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| 23 | <title>UVMAT HELP</title> |
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| 81 | <!--Converted with LaTeX2HTML 2002 (1.62) original version by: Nikos Drakos, CBLU, University of Leeds * revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan * with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><!--Navigation Panel--> |
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| 82 | </head> |
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| 85 | <body style="direction: ltr; width: 720px;" lang="en-US"> |
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| 86 | |
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| 89 | |
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| 90 | <p><br> |
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| 91 | |
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| 94 | |
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| 95 | </p> |
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| 96 | |
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| 98 | |
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| 99 | |
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| 100 | <div style="text-align: center;"><a class="mozTocDIV" name="mozTocId399691"></a><big><big><big><b>UVMAT |
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| 101 | ON LINE HELP</b></big></big></big><a class="mozTocH1" name="top"></a></div> |
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| 102 | |
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| 103 | |
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| 104 | |
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| 105 | |
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| 106 | <p align="center"><b><i>Joël |
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| 107 | Sommeria, revised March 2008</i></b></p> |
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| 108 | |
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| 109 | |
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| 110 | |
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| 111 | |
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| 112 | <ul id="mozToc"> |
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| 113 | |
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| 114 | |
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| 115 | |
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| 116 | <!--mozToc h1 1 h2 2 h3 3--><li><a href="#mozTocId965242">1-Generalities:</a> |
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| 117 | |
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| 118 | |
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| 119 | |
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| 120 | <ul> |
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| 121 | |
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| 122 | |
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| 123 | |
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| 124 | <li><a href="#mozTocId812052">1.1 |
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| 125 | Aim:</a></li> |
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| 126 | |
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| 127 | |
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| 128 | |
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| 129 | <li><a href="#mozTocId216298">1.2 |
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| 130 | The package:</a></li> |
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| 131 | |
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| 132 | |
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| 133 | |
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| 134 | <li><a href="#mozTocId428776">1.3 |
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| 135 | Overview of the GUI uvmat.fig:</a></li> |
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| 136 | |
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| 137 | |
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| 138 | |
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| 139 | <li><a href="#mozTocId783870">1.4 |
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| 140 | General tools:</a></li> |
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| 141 | |
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| 142 | |
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| 143 | |
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| 145 | |
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| 146 | |
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| 147 | </ul> |
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| 150 | |
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| 151 | </li> |
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| 152 | |
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| 153 | |
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| 154 | |
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| 155 | <li><a href="#mozTocId805645">2 |
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| 156 | Input files and navigation with uvmat:</a> |
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| 157 | |
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| 158 | |
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| 159 | |
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| 160 | <ul> |
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| 161 | |
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| 162 | |
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| 163 | |
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| 164 | <li><a href="#mozTocId260505">2.1 |
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| 165 | Input file naming and |
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| 166 | indexing:</a></li> |
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| 167 | |
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| 168 | |
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| 169 | |
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| 170 | <li><a href="#mozTocId596391">2.2 |
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| 171 | Comparing two fields:</a></li> |
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| 172 | |
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| 173 | |
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| 174 | |
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| 175 | <li><a href="#mozTocId383799">2.3 |
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| 176 | Documentation files (.xml):</a></li> |
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| 177 | |
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| 178 | |
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| 179 | |
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| 180 | <li><a href="#mozTocId962678">2.4 |
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| 181 | Navigation among file |
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| 182 | indices:</a></li> |
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| 183 | |
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| 184 | |
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| 185 | |
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| 186 | <li><a href="#mozTocId130904">2.5 |
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| 187 | Ancillary input files:</a></li> |
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| 188 | |
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| 189 | |
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| 190 | |
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| 191 | |
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| 192 | |
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| 193 | |
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| 194 | </ul> |
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| 195 | |
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| 196 | |
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| 197 | |
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| 198 | </li> |
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| 199 | |
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| 200 | |
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| 201 | |
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| 202 | <li><a href="#mozTocId314695">3 |
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| 203 | Field representation (uvmat): </a> |
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| 204 | |
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| 205 | |
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| 206 | |
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| 207 | <ul> |
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| 208 | |
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| 209 | |
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| 210 | |
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| 211 | <li><a href="#mozTocId187440">3.1 |
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| 212 | Images and scalars:</a></li> |
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| 213 | |
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| 214 | |
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| 215 | |
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| 216 | <li><a href="#mozTocId794224">3.2 |
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| 217 | Vectors:</a></li> |
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| 218 | |
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| 219 | |
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| 220 | |
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| 221 | <li><a href="#mozTocId356208">3.3 |
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| 222 | Selecting fields from CIVx files:</a></li> |
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| 223 | |
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| 224 | |
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| 225 | |
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| 226 | <li><a href="#mozTocId271098">3.4 Succession of operations:</a></li> |
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| 227 | |
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| 228 | |
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| 229 | |
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| 230 | <li><a href="#mozTocId901896">3.5 |
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| 231 | Histograms</a></li> |
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| 232 | |
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| 233 | |
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| 234 | |
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| 235 | <li><a href="#mozTocId472013">3.6 |
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| 236 | Viewing volume fields:**</a></li> |
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| 237 | |
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| 238 | |
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| 239 | |
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| 240 | |
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| 241 | |
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| 242 | |
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| 243 | </ul> |
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| 244 | |
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| 245 | |
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| 246 | |
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| 247 | </li> |
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| 248 | |
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| 249 | |
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| 250 | |
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| 251 | <li><a href="#mozTocId71913">4 The |
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| 252 | GUI get_field.fig:</a> |
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| 253 | |
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| 254 | |
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| 255 | |
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| 256 | <ul> |
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| 257 | |
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| 258 | |
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| 259 | |
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| 260 | <li><a href="#mozTocId539613">4.1 |
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| 261 | Overview:</a></li> |
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| 262 | |
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| 263 | |
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| 264 | |
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| 265 | <li><a href="#mozTocId665737">4.2 |
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| 266 | 2D and 3D plots: </a></li> |
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| 267 | |
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| 268 | |
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| 269 | |
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| 270 | |
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| 271 | |
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| 272 | |
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| 273 | </ul> |
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| 274 | |
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| 275 | |
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| 276 | |
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| 277 | </li> |
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| 278 | |
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| 279 | |
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| 280 | |
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| 281 | <li><a href="#mozTocId71913">5 |
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| 282 | Projection objects:</a> |
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| 283 | |
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| 284 | |
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| 285 | |
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| 286 | <ul> |
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| 287 | |
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| 288 | |
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| 289 | |
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| 290 | <li><a href="#mozTocId113693">5-1 |
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| 291 | Definition and editing with the uvmat interface:</a></li> |
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| 292 | |
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| 293 | |
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| 294 | |
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| 295 | <li><a href="#mozTocId624817">5-2 |
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| 296 | Object properties:</a></li> |
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| 297 | |
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| 298 | |
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| 299 | |
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| 300 | <li><a href="#mozTocId680179">5-3 |
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| 301 | Object plotting:</a></li> |
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| 302 | |
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| 303 | |
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| 304 | |
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| 305 | |
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| 306 | |
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| 307 | |
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| 308 | </ul> |
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| 309 | |
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| 310 | |
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| 311 | |
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| 312 | </li> |
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| 313 | |
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| 314 | |
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| 315 | |
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| 316 | <li><a href="#mozTocId529788">6 |
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| 317 | Geometric |
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| 318 | calibration:</a> |
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| 319 | |
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| 320 | |
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| 321 | |
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| 322 | <ul> |
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| 323 | |
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| 324 | |
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| 325 | |
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| 326 | <li><a href="#mozTocId348355">6-1 Generalities:</a></li> |
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| 327 | |
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| 328 | |
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| 329 | |
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| 330 | <li><a href="#mozTocId348355">6-2 |
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| 331 | The GUI geometry_calib.fig:</a></li> |
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| 332 | |
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| 333 | |
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| 334 | |
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| 335 | |
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| 336 | |
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| 337 | |
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| 338 | </ul> |
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| 339 | |
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| 340 | |
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| 341 | |
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| 342 | </li> |
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| 343 | |
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| 344 | |
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| 345 | |
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| 346 | <li><a href="#mozTocId574740">7 |
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| 347 | Masks and grids:</a> |
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| 348 | |
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| 349 | |
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| 350 | |
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| 351 | <ul> |
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| 352 | |
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| 353 | |
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| 354 | |
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| 355 | <li><a href="#mozTocId348355">7-1 |
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| 356 | Masks:</a></li> |
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| 357 | |
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| 358 | |
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| 359 | |
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| 360 | <li><a href="#mozTocId502619">7-2 |
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| 361 | Grids:</a></li> |
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| 362 | |
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| 363 | |
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| 364 | |
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| 365 | |
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| 366 | |
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| 367 | |
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| 368 | </ul> |
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| 369 | |
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| 370 | |
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| 371 | |
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| 372 | </li> |
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| 373 | |
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| 374 | |
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| 375 | |
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| 376 | <li><a href="#mozTocId479237">8 |
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| 377 | Operations on field series:</a> |
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| 378 | |
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| 379 | |
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| 380 | |
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| 381 | <ul> |
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| 382 | |
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| 383 | |
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| 384 | |
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| 385 | <li><a href="#mozTocId856905">8-1 |
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| 386 | The GUI series.fig:</a></li> |
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| 387 | |
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| 388 | |
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| 389 | |
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| 390 | <li><a href="#mozTocId483256">8-2 |
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| 391 | check_files:</a></li> |
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| 392 | |
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| 393 | |
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| 394 | |
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| 395 | <li><a href="#mozTocId310092">8-3 |
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| 396 | aver_stat:</a></li> |
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| 397 | |
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| 398 | |
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| 399 | |
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| 400 | <li><a href="#mozTocId887562">8-4 |
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| 401 | time_series:</a></li> |
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| 402 | |
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| 403 | |
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| 404 | |
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| 405 | <li><a href="#mozTocId109414">8-5 |
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| 406 | merge_proj: </a></li> |
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| 407 | |
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| 408 | |
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| 409 | |
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| 410 | <li><a href="#mozTocId736727">8-6 more...:</a></li> |
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| 411 | |
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| 412 | |
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| 413 | |
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| 414 | <li><a href="#mozTocId360245">Peaklocking |
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| 415 | errors:(to update |
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| 416 | **)</a></li> |
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| 417 | |
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| 418 | |
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| 419 | |
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| 420 | |
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| 421 | |
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| 422 | |
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| 423 | </ul> |
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| 424 | |
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| 425 | |
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| 426 | |
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| 427 | </li> |
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| 428 | |
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| 429 | |
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| 430 | |
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| 431 | <li><a href="#mozTocId280008">9 |
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| 432 | The GUI editxml.fig:</a></li> |
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| 433 | |
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| 434 | |
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| 435 | |
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| 436 | <li><a href="#mozTocId609725">10 |
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| 437 | Particle Imaging Velocimetry (PIV)</a> |
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| 438 | |
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| 439 | |
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| 440 | |
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| 441 | <ul> |
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| 442 | |
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| 443 | |
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| 444 | |
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| 445 | <li><a href="#mozTocId109414">10-1 |
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| 446 | Civ operations:</a></li> |
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| 447 | |
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| 448 | |
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| 449 | |
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| 450 | <li><a href="#mozTocId178080">10-2 |
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| 451 | Codes for vector flags:</a></li> |
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| 452 | |
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| 453 | |
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| 454 | |
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| 455 | <li><a href="#mozTocId109414">10-3 |
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| 456 | RUN and BATCH: </a></li> |
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| 457 | |
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| 458 | |
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| 459 | |
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| 460 | <li><a href="#mozTocId491591">10-4 Displacement between two |
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| 461 | image series: </a></li> |
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| 462 | |
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| 463 | |
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| 464 | |
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| 465 | <li><a href="#mozTocId118098">10-5 Stereoscopic PIV: </a></li> |
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| 466 | |
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| 467 | |
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| 468 | |
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| 469 | <li><a href="#mozTocId691001">10-6 3D PIV in a volume:(to be |
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| 470 | implemented**)</a></li> |
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| 471 | |
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| 472 | |
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| 473 | |
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| 474 | |
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| 475 | |
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| 476 | |
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| 477 | </ul> |
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| 478 | |
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| 479 | |
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| 480 | |
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| 481 | </li> |
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| 482 | |
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| 483 | |
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| 484 | |
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| 485 | <li><a href="#mozTocId280008">11 |
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| 486 | LIF:(to update **)</a></li> |
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| 487 | |
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| 488 | |
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| 489 | |
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| 490 | <li><a href="#mozTocId67078">About this |
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| 491 | document |
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| 492 | ...</a></li> |
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| 493 | |
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| 494 | |
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| 495 | |
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| 496 | </ul> |
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| 497 | |
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| 498 | |
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| 499 | |
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| 500 | |
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| 501 | <br> |
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| 502 | |
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| 503 | |
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| 504 | |
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| 505 | |
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| 506 | <span style="text-decoration: underline;"></span><span style="text-decoration: underline;"></span> |
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| 507 | <h1><a class="mozTocH1" name="mozTocId965242"></a><a name="generalities2"></a><a name="generalities1"></a>1-Generalities:</h1> |
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| 508 | |
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| 509 | |
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| 510 | |
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| 511 | |
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| 512 | <h2><a class="mozTocH2" name="mozTocId812052"></a><a name="netcdf"></a><a name="aim"></a>1.1 |
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| 513 | Aim:</h2> |
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| 514 | |
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| 515 | |
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| 516 | |
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| 517 | |
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| 518 | <p style="text-align: justify;"> |
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| 519 | This Matlab toolbox is a set of |
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| 520 | Graphic User Interfaces (GUI) and related functions, designed to scan |
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| 521 | and |
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| 522 | analyse images, vector and scalar fields, in two or three dimensions. |
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| 523 | It can be used with a wide variety of input data: all image |
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| 524 | formats recognised by |
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| 525 | Matlab (function <span style="text-decoration: underline;">imread.m</span>), |
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| 526 | .avi movies |
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| 527 | (after installation of the appropriate codex), binary files with the |
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| 528 | format NetCDF. The package is |
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| 529 | however particularly designed for laboratory data obtained |
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| 530 | from |
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| 531 | imaging systems: it includes a GUI to run the Particle |
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| 532 | Image Velocimetry |
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| 533 | software CIVx of civproject, see <a href="http://www.civproject.org/documentation">http://www.civproject.org</a>, |
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| 534 | as well as tools for geometric calibration, masks, grid generation and |
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| 535 | image pre-processing (background removal), and editing of xml |
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| 536 | documentation files. Stereoscopic PIV, PIV-LIF |
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| 537 | and 3D PIV in a volume (still under development) are handled. </p> |
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| 538 | |
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| 539 | |
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| 540 | |
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| 541 | |
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| 542 | <p style="text-align: justify;"> |
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| 543 | This package can be used |
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| 544 | without knowledge of |
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| 545 | the Matlab language, but it is designed to be complemented by |
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| 546 | user |
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| 547 | defined Matlab functions, providing flexibility for further data |
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| 548 | analysis. It provides convenient tools to manage a set of |
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| 549 | processing function with a standardized input-output system.</p> |
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| 550 | |
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| 551 | |
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| 552 | |
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| 553 | |
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| 554 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId216298"></a><a name="netcdf1"></a><a name="paquage"></a>1.2 |
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| 555 | The package:</h2> |
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| 556 | |
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| 557 | |
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| 558 | |
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| 559 | |
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| 560 | <p style="text-align: justify;"> |
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| 561 | The master program |
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| 562 | is a Matlab GUI, made of a |
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| 563 | Matlab figure <a href="FUNCTIONS_DOC/uvmat.html"><span style="text-decoration: underline;">uvmat.fig</span></a> |
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| 564 | and an associated set of functions in |
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| 565 | the file <span style="text-decoration: underline;">uvmat.m</span>. The menu bar at the top of the GUI, push |
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| 566 | buttons and editing box in the |
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| 567 | <span style="text-decoration: underline;">uvmat.fig</span> |
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| 568 | start the Matlab functions in <span style="text-decoration: underline;">uvmat.m</span> |
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| 569 | (Callback |
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| 570 | functions). The directory <span style="text-decoration: underline;">UVMAT</span> |
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| 571 | also contains the following set of GUI, which can be called by push |
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| 572 | buttons in |
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| 573 | <span style="text-decoration: underline;">uvmat.fig</span><strong style="font-weight: normal;"></strong>, |
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| 574 | or |
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| 575 | opened directly from the Matlab prompt. </p> |
|---|
| 576 | |
|---|
| 577 | |
|---|
| 578 | |
|---|
| 579 | |
|---|
| 580 | <ul style="text-align: justify;"> |
|---|
| 581 | |
|---|
| 582 | |
|---|
| 583 | |
|---|
| 584 | |
|---|
| 585 | <li> <strong><a href="FUNCTIONS_DOC/civ.html"><span style="text-decoration: underline; font-weight: normal;">civ.fig</span></a>:</strong> run |
|---|
| 586 | the software for Particle Imaging Velocimetry CIVx </li> |
|---|
| 587 | |
|---|
| 588 | |
|---|
| 589 | |
|---|
| 590 | |
|---|
| 591 | <li><a href="FUNCTIONS_DOC/editxml.html"><span style="text-decoration: underline;">editxml.fig</span></a>: |
|---|
| 592 | display and edit xml files according to xml schema</li> |
|---|
| 593 | |
|---|
| 594 | |
|---|
| 595 | |
|---|
| 596 | |
|---|
| 597 | <li><a href="FUNCTIONS_DOC/geometry_calib.html"><span style="text-decoration: underline;">geometry_calib.fig</span></a>: |
|---|
| 598 | determines geometric calibration parameters for relating image to |
|---|
| 599 | physical coordinates</li> |
|---|
| 600 | |
|---|
| 601 | |
|---|
| 602 | |
|---|
| 603 | |
|---|
| 604 | <li><a href="FUNCTIONS_DOC/get_field.html"><span style="text-decoration: underline;">get_field.fig</span></a><span style="font-weight: bold;">:</span> select coordinates |
|---|
| 605 | and field in a general NetCDF file </li> |
|---|
| 606 | |
|---|
| 607 | |
|---|
| 608 | |
|---|
| 609 | |
|---|
| 610 | <li><a href="FUNCTIONS_DOC/series.html"><span style="text-decoration: underline;">series.fig</span></a><span style="font-weight: bold;">:</span> apply various |
|---|
| 611 | processing functions to series of fields</li> |
|---|
| 612 | |
|---|
| 613 | |
|---|
| 614 | |
|---|
| 615 | |
|---|
| 616 | <li><a href="FUNCTIONS_DOC/set_grid.html"><span style="text-decoration: underline;">set_grid.fig</span></a><span style="font-weight: bold;">:</span> creates grids for |
|---|
| 617 | PIV</li> |
|---|
| 618 | |
|---|
| 619 | |
|---|
| 620 | |
|---|
| 621 | |
|---|
| 622 | <li><a href="FUNCTIONS_DOC/set_object.html"><span style="text-decoration: underline;">set_object.fig</span></a><span style="font-weight: bold;">:</span> creates and edits |
|---|
| 623 | geometric objects used to project data: points, lines, planes...</li> |
|---|
| 624 | |
|---|
| 625 | |
|---|
| 626 | |
|---|
| 627 | |
|---|
| 628 | </ul> |
|---|
| 629 | |
|---|
| 630 | |
|---|
| 631 | |
|---|
| 632 | |
|---|
| 633 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId277137"></a> |
|---|
| 634 | Functions in the UVMAT |
|---|
| 635 | directory are called by these GUIs. |
|---|
| 636 | These are used to generate file names, read files and plot data, and |
|---|
| 637 | perform various ancillary tasks. Type 'help fct_name' to get detail |
|---|
| 638 | information on the function named fct_name, or open it with an editor. <br> |
|---|
| 639 | |
|---|
| 640 | |
|---|
| 641 | |
|---|
| 642 | |
|---|
| 643 | <br> |
|---|
| 644 | |
|---|
| 645 | |
|---|
| 646 | |
|---|
| 647 | |
|---|
| 648 | <span style="font-weight: bold; font-style: italic;">Help |
|---|
| 649 | and |
|---|
| 650 | documentation:</span> <br> |
|---|
| 651 | |
|---|
| 652 | |
|---|
| 653 | |
|---|
| 654 | |
|---|
| 655 | To install the |
|---|
| 656 | package, uncompress the whole directory UVMAT and read |
|---|
| 657 | the instructions in the file <a href="README_INSTALL.txt"><span style="text-decoration: underline;">README_INSTALL.txt</span></a> |
|---|
| 658 | contained in the sub-directory UVMAT_DOC. This directory also |
|---|
| 659 | contains the current help file <span style="text-decoration: underline;">uvmat_doc.html</span> |
|---|
| 660 | and a sub-directory <a href="FUNCTIONS_DOC/index.html">FUNCTIONS_DOC</a> |
|---|
| 661 | with detail documention for all functions. Finally a tutorial <span style="text-decoration: underline;">UV_DEMO </span>is |
|---|
| 662 | also available (outside UVMAT) with test data |
|---|
| 663 | files. <br> |
|---|
| 664 | |
|---|
| 665 | |
|---|
| 666 | |
|---|
| 667 | |
|---|
| 668 | The current help file is |
|---|
| 669 | accessible on-line from each of the GUIs. A short |
|---|
| 670 | comment about each GUI uicontrol (push buttons, |
|---|
| 671 | edit |
|---|
| 672 | boxes, menus..), as well as the name of this uicontrol, is provided as |
|---|
| 673 | a tool tip window by moving the |
|---|
| 674 | mouse over it. In this help document, the names of GUI uicontrols are |
|---|
| 675 | quoted |
|---|
| 676 | with <span style="font-weight: bold;">bold</span> |
|---|
| 677 | characters, names of files in the package are <span style="text-decoration: underline;">underlined</span>, |
|---|
| 678 | and text on the matlab workspace is under quotes ' '. |
|---|
| 679 | Features not yet implemented or tested (in particular 3D features) are |
|---|
| 680 | marked by **.<br> |
|---|
| 681 | |
|---|
| 682 | |
|---|
| 683 | |
|---|
| 684 | |
|---|
| 685 | <br> |
|---|
| 686 | |
|---|
| 687 | |
|---|
| 688 | |
|---|
| 689 | |
|---|
| 690 | <span style="font-weight: bold; font-style: italic;">Copyright |
|---|
| 691 | and licence:</span> <br> |
|---|
| 692 | |
|---|
| 693 | |
|---|
| 694 | |
|---|
| 695 | |
|---|
| 696 | Copyright Joel Sommeria, 2008, LEGI / CNRS-UJF-INPG, |
|---|
| 697 | sommeria@coriolis-legi.org.<br> |
|---|
| 698 | |
|---|
| 699 | |
|---|
| 700 | |
|---|
| 701 | |
|---|
| 702 | The |
|---|
| 703 | package UVMAT is free |
|---|
| 704 | software; it can be redistributed and/or modified it under the terms of |
|---|
| 705 | the GNU General Public License as published by the Free Software |
|---|
| 706 | Foundation; either version 2 of the License, or (at your option) any |
|---|
| 707 | later version.<br> |
|---|
| 708 | |
|---|
| 709 | |
|---|
| 710 | |
|---|
| 711 | |
|---|
| 712 | UVMAT is |
|---|
| 713 | distributed in the hope |
|---|
| 714 | that it will be useful, but WITHOUT ANY WARRANTY; without even the |
|---|
| 715 | implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
|---|
| 716 | PURPOSE. See theGNU General Public License (file <a href="COPYING.txt">COPYING.txt</a>) for more details.</div> |
|---|
| 717 | |
|---|
| 718 | |
|---|
| 719 | |
|---|
| 720 | |
|---|
| 721 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId428776"></a><a name="netcdf2"></a><a name="opening"></a>1.3 |
|---|
| 722 | Overview of the GUI <span style="text-decoration: underline;">uvmat.fig</span>:</h2> |
|---|
| 723 | |
|---|
| 724 | |
|---|
| 725 | |
|---|
| 726 | |
|---|
| 727 | <p style="text-align: justify;"> |
|---|
| 728 | Type 'uvmat' in the Matlab |
|---|
| 729 | prompt to display |
|---|
| 730 | the GUI. |
|---|
| 731 | Then the path and date of the version of <span style="text-decoration: underline;">uvmat.m</span> |
|---|
| 732 | used is |
|---|
| 733 | displayed in the central display window. During opening, the |
|---|
| 734 | program checks that the Matlab path to all the functions called by |
|---|
| 735 | uvmat |
|---|
| 736 | are in the |
|---|
| 737 | same directory <span style="text-decoration: underline;">UVMAT</span> |
|---|
| 738 | as <span style="text-decoration: underline;">uvmat.m</span>, |
|---|
| 739 | using the function<span style="text-decoration: underline;"> |
|---|
| 740 | <a href="FUNCTIONS_DOC/check_functions.html">check_functions</a></span>. |
|---|
| 741 | Indeed a function with a higher priority path |
|---|
| 742 | could |
|---|
| 743 | override a function of the toolbox with the same name (see the Matlab |
|---|
| 744 | help 'help path'). The list of overridden functions is given in the |
|---|
| 745 | central display window at the opening of the uvmat interface.</p> |
|---|
| 746 | |
|---|
| 747 | |
|---|
| 748 | |
|---|
| 749 | |
|---|
| 750 | <p style="text-align: justify;"> |
|---|
| 751 | The name of each uicontrol |
|---|
| 752 | (push |
|---|
| 753 | buttons, edit boxes, menus..) on the GUI can be displayed in |
|---|
| 754 | a tool tip window by moving the |
|---|
| 755 | mouse over it: it is followed by a short help comment. The name is also |
|---|
| 756 | displayed in the window <span style="font-weight: bold;">text_display_1</span>, |
|---|
| 757 | at the upper right of the GUI. The red pushbuttons command the main |
|---|
| 758 | actions, while the |
|---|
| 759 | green ones command ancillary or help actions. Links with |
|---|
| 760 | other |
|---|
| 761 | interfaces are in magenta. The current activation of an |
|---|
| 762 | uicontrol |
|---|
| 763 | is indicated by a yellow color. </p> |
|---|
| 764 | |
|---|
| 765 | |
|---|
| 766 | |
|---|
| 767 | |
|---|
| 768 | <p style="text-align: justify;"> |
|---|
| 769 | The menu bar <span style="font-weight: bold;">Open/Browse...</span>at |
|---|
| 770 | the top |
|---|
| 771 | left allows to browse the directories to open files. The last |
|---|
| 772 | previously opened files can be also directly accessed in the same menu. |
|---|
| 773 | After selection, |
|---|
| 774 | the file names are decomposed into path, root name, index and |
|---|
| 775 | extension, |
|---|
| 776 | displayed in the top edit boxes. The input file name, as well |
|---|
| 777 | as |
|---|
| 778 | other personal information, is stored for convenience in a |
|---|
| 779 | file (<span style="text-decoration: underline;">uvmat_perso.mat</span>) |
|---|
| 780 | automatically created in the user preference directory of Matlab |
|---|
| 781 | (indicated by the |
|---|
| 782 | Matlab command 'prefdir'). Browsers then read default input |
|---|
| 783 | in this file. A corruption of this file <span style="text-decoration: underline;">uvmat_perso.mat </span>may |
|---|
| 784 | lead to problems for opening uvmat, type <a href="FUNCTIONS_DOC/reinit.html">reinit</a> on the |
|---|
| 785 | Matlab prompt to delete it.</p> |
|---|
| 786 | |
|---|
| 787 | |
|---|
| 788 | |
|---|
| 789 | |
|---|
| 790 | <p style="text-align: justify;"> |
|---|
| 791 | A choice of input field ( 'image', |
|---|
| 792 | 'velocity'... ) can be made by the menu <span style="font-weight: bold;">Fields</span>. </p> |
|---|
| 793 | |
|---|
| 794 | |
|---|
| 795 | |
|---|
| 796 | |
|---|
| 797 | <p style="text-align: justify;"> |
|---|
| 798 | Two file series can be |
|---|
| 799 | simultaneously opened and compared using the check box <span style="font-weight: bold;">SubField</span> (<span style="font-weight: bold;">'-'</span>) at |
|---|
| 800 | the upper left. </p> |
|---|
| 801 | |
|---|
| 802 | |
|---|
| 803 | |
|---|
| 804 | |
|---|
| 805 | <p style="text-align: justify;"> |
|---|
| 806 | Once a root name has been |
|---|
| 807 | introduced, navigation among the file indices is provided by |
|---|
| 808 | the push buttons <span style="font-weight: bold;">runplus</span> |
|---|
| 809 | ( '<span style="font-weight: bold;">-></span>') |
|---|
| 810 | and <span style="font-weight: bold;">runmin</span> |
|---|
| 811 | ('<span style="font-weight: bold;"><-</span>') |
|---|
| 812 | at the upper left. The push button <span style="font-weight: bold;">REFRESH</span> |
|---|
| 813 | reactualizes the current plot on the interface. </p> |
|---|
| 814 | |
|---|
| 815 | |
|---|
| 816 | |
|---|
| 817 | |
|---|
| 818 | <p style="text-align: justify;"> |
|---|
| 819 | Parameters for the display of |
|---|
| 820 | scalars/images and vector fields are |
|---|
| 821 | defined in the frames <span style="font-weight: bold;">SCAL</span> |
|---|
| 822 | and <span style="font-weight: bold;">VEC</span> |
|---|
| 823 | respectively on the right |
|---|
| 824 | side. </p> |
|---|
| 825 | |
|---|
| 826 | |
|---|
| 827 | |
|---|
| 828 | |
|---|
| 829 | <p style="text-align: justify;"> |
|---|
| 830 | The push buttons <span style="font-weight: bold;">calib</span>. |
|---|
| 831 | , <span style="font-weight: bold;">mask</span>, <span style="font-weight: bold;">grid</span> are used to |
|---|
| 832 | create respectively a geometric calibration of the images, masks and |
|---|
| 833 | grids used for PIV.</p> |
|---|
| 834 | |
|---|
| 835 | |
|---|
| 836 | |
|---|
| 837 | |
|---|
| 838 | <p style="text-align: justify;"> |
|---|
| 839 | The button <span style="font-weight: bold;">CIV</span> |
|---|
| 840 | opens the |
|---|
| 841 | interface<span style="font-weight: bold;"> </span><span style="text-decoration: underline;">civ.fig</span><span style="font-weight: bold;"> </span>or Particle |
|---|
| 842 | Imaging Velocimetry. The menu bar<span style="font-weight: bold;"> Run/Field series </span>opens the |
|---|
| 843 | interface <span style="text-decoration: underline;">series.fig</span> |
|---|
| 844 | for analysing field series. </p> |
|---|
| 845 | |
|---|
| 846 | |
|---|
| 847 | |
|---|
| 848 | |
|---|
| 849 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId783870"></a>1.4 |
|---|
| 850 | General tools:</h2> |
|---|
| 851 | |
|---|
| 852 | |
|---|
| 853 | |
|---|
| 854 | |
|---|
| 855 | <p style="text-align: justify;"><span style="font-weight: bold; font-style: italic;">Mouse |
|---|
| 856 | motion:</span> the local |
|---|
| 857 | coordinates and field values are obtained by moving the mouse over any |
|---|
| 858 | plotting axes in the uvmat system. This is displayed in the four text |
|---|
| 859 | boxes <span style="font-weight: bold;">text_display_1, |
|---|
| 860 | _2, _3, _4</span> on the upper right.</p> |
|---|
| 861 | |
|---|
| 862 | |
|---|
| 863 | |
|---|
| 864 | |
|---|
| 865 | <p style="text-align: justify;"><span style="font-weight: bold; font-style: italic;"><a name="Zoom"></a>Zoom:</span> a zoom rectangle |
|---|
| 866 | can |
|---|
| 867 | be cut in any plotting axes by pressing the mouse left button, moving |
|---|
| 868 | the mouse while the button is pressed, and releasing the button to end |
|---|
| 869 | the operation. The plot in the enclosed rectangular region is |
|---|
| 870 | reproduced in a new figure. Zoom can be alternatively obtained in the |
|---|
| 871 | initial figure by selecting the check box zoom on the right of the |
|---|
| 872 | uvmat interface, and pressing the mouse left button on the figure. Zoom |
|---|
| 873 | out by pressing the right mouse button<span style="font-style: italic;">. </span>The zoomed |
|---|
| 874 | region can be translated through the initial field by |
|---|
| 875 | pressing the directional arrows of the key board.</p> |
|---|
| 876 | |
|---|
| 877 | |
|---|
| 878 | |
|---|
| 879 | |
|---|
| 880 | <p style="text-align: justify;"><span style="font-weight: bold; font-style: italic;"><a name="Zoom"></a>Other mouse operations:</span> |
|---|
| 881 | if an object creation option is selected, or the options calib. or |
|---|
| 882 | mask, mouse action products specific effects, see the corresponding |
|---|
| 883 | sections. These actions override the zoom. </p> |
|---|
| 884 | |
|---|
| 885 | |
|---|
| 886 | |
|---|
| 887 | |
|---|
| 888 | <p style="text-align: justify;"><span style="font-weight: bold; font-style: italic;">Keyboard |
|---|
| 889 | short cuts:</span> the activation of the push buttons <span style="font-weight: bold;">runplus</span> ( '<span style="font-weight: bold;">-></span>') |
|---|
| 890 | and <span style="font-weight: bold;">runmin</span> |
|---|
| 891 | ('<span style="font-weight: bold;"><-</span>') |
|---|
| 892 | can be performed by the key board short cuts 'p' and 'm' respectively, |
|---|
| 893 | after initialisation by pressing the mouse on the uvmat interface. |
|---|
| 894 | Similarly the command of the push button run0 can be performed by |
|---|
| 895 | typing the return carriage key.</p> |
|---|
| 896 | |
|---|
| 897 | |
|---|
| 898 | |
|---|
| 899 | |
|---|
| 900 | <p style="text-align: justify;"> <span style="font-style: italic;"><span style="font-weight: bold;">Extracting graphs</span></span><span style="font-weight: bold; font-style: italic;">:</span> |
|---|
| 901 | The current field is displayed in the central |
|---|
| 902 | window, while their histograms are displayed in the lower left graphs. |
|---|
| 903 | The field in the central window can be copied to a separate figure by |
|---|
| 904 | the push button <span style="font-weight: bold;">extract_plot</span> |
|---|
| 905 | on the right. This allows plot editing, exporting and printing, using |
|---|
| 906 | standard Matlab graphic tools. It is also possible to extract a |
|---|
| 907 | subregion of any graph by cutting a <a href="uvmat_doc.html#Zoom">zoom</a> rectangle with the |
|---|
| 908 | mouse. The creation of <a href="uvmat_doc.html#ProjectionObject">projection |
|---|
| 909 | objects</a>, with the buttons in the box <span style="font-weight: bold;">OBJECT, </span>provides |
|---|
| 910 | alternative ways for extracting graphs. Movies in the avi format can be |
|---|
| 911 | extracted using <span style="font-weight: bold;">Export/make movie avi</span> in the menu bar.</p> |
|---|
| 912 | |
|---|
| 913 | |
|---|
| 914 | |
|---|
| 915 | |
|---|
| 916 | <p style="text-align: justify;"> <span style="font-style: italic;"><span style="font-weight: bold;">Extracting data as Matlab arrays</span></span><span style="font-weight: bold; font-style: italic;">:</span> |
|---|
| 917 | the data plotted in any figure can be made available in the |
|---|
| 918 | Matlab workspace as global variables: for that purpose click |
|---|
| 919 | on |
|---|
| 920 | the corresponding axes with the right mouse button. The list of |
|---|
| 921 | available fields is then displayed in a new figure, and the same list |
|---|
| 922 | is printed on the Matlab workspace in the form of a Matlab structure |
|---|
| 923 | 'CurData'. An image or scalar matrix is for instance obtained as |
|---|
| 924 | CurData.A. </p> |
|---|
| 925 | |
|---|
| 926 | |
|---|
| 927 | |
|---|
| 928 | |
|---|
| 929 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId483726"></a> |
|---|
| 930 | </div> |
|---|
| 931 | |
|---|
| 932 | |
|---|
| 933 | |
|---|
| 934 | |
|---|
| 935 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId805645"></a><a name="file_input"></a>2 |
|---|
| 936 | Input files and navigation with uvmat:</h1> |
|---|
| 937 | |
|---|
| 938 | |
|---|
| 939 | |
|---|
| 940 | |
|---|
| 941 | <p style="text-align: justify;"><a href="#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="#top">Back to the Top</a></p> |
|---|
| 942 | |
|---|
| 943 | |
|---|
| 944 | |
|---|
| 945 | |
|---|
| 946 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId260505"></a><a name="nomenclature"></a>2.1 |
|---|
| 947 | Input file naming and |
|---|
| 948 | indexing:</h2> |
|---|
| 949 | |
|---|
| 950 | |
|---|
| 951 | |
|---|
| 952 | |
|---|
| 953 | <p style="text-align: justify;"> |
|---|
| 954 | A wide variety of input files, |
|---|
| 955 | organised in |
|---|
| 956 | indexed series, can be opened by uvmat. When a file name is selected by |
|---|
| 957 | the browser, it is automatically split into a root path (filling |
|---|
| 958 | the edit box <span style="font-weight: bold;">RootPath</span>), |
|---|
| 959 | a subdirectory (edit box <span style="font-weight: bold;">SubDir</span>), |
|---|
| 960 | a root name (edit box <span style="font-weight: bold;">RootFile</span>), |
|---|
| 961 | an index suffix (edit box <span style="font-weight: bold;">FileIndex</span>), |
|---|
| 962 | a file extension (edit box <span style="font-weight: bold;">FileExt</span>). |
|---|
| 963 | Note that no blank is allowed in path and file names, to avoid possible |
|---|
| 964 | errors in some processing software. The input file name can be directly |
|---|
| 965 | entered and modified by these edit |
|---|
| 966 | boxes, without the browser. The file indices can be then incremented or |
|---|
| 967 | decremented by |
|---|
| 968 | the navigation buttons <span style="font-weight: bold;">runmin</span> |
|---|
| 969 | ('<span style="font-weight: bold;"><-</span>') |
|---|
| 970 | and <span style="font-weight: bold;">runplus</span> |
|---|
| 971 | ( '<span style="font-weight: bold;">-></span>'), |
|---|
| 972 | see <a href="#navigation">section 2.4</a>.</p> |
|---|
| 973 | |
|---|
| 974 | |
|---|
| 975 | |
|---|
| 976 | |
|---|
| 977 | <p style="text-align: justify;"> |
|---|
| 978 | Different kinds of file |
|---|
| 979 | indexing are recognised:</p> |
|---|
| 980 | |
|---|
| 981 | |
|---|
| 982 | |
|---|
| 983 | |
|---|
| 984 | <ul style="text-align: justify;"> |
|---|
| 985 | |
|---|
| 986 | |
|---|
| 987 | |
|---|
| 988 | |
|---|
| 989 | <li><span style="font-weight: bold;"><span style="font-style: italic;">Simple series:</span> </span></li> |
|---|
| 990 | |
|---|
| 991 | |
|---|
| 992 | |
|---|
| 993 | |
|---|
| 994 | They are labeled |
|---|
| 995 | by a single integer index <em>i</em>, with name obtained |
|---|
| 996 | by concatenation of the full root ('RootPath'/'RootFile'), the suffix |
|---|
| 997 | '_i', and the file extension<em></em> 'Ext' |
|---|
| 998 | (example 'Exp1/aa_45.png'). Then the character transcription of |
|---|
| 999 | the integer i must not begin by 0. Other indexing systems without the |
|---|
| 1000 | suffix '_',are also recognized (e.g. 'Exp1/aa045.jpg' or |
|---|
| 1001 | 'Exp1/aa45.TIF'), but not recommended. Finally a simple |
|---|
| 1002 | series |
|---|
| 1003 | can be read from a single .avi movie file, with no file index. <li><span style="font-weight: bold; font-style: italic;">Double |
|---|
| 1004 | series:</span> </li> |
|---|
| 1005 | |
|---|
| 1006 | |
|---|
| 1007 | |
|---|
| 1008 | |
|---|
| 1009 | They are labeled |
|---|
| 1010 | by two integer indices i and j, with names obtained by concatenating |
|---|
| 1011 | the full root, the suffix '_i_j' and the file extension(e.g. |
|---|
| 1012 | 'Exp/aa_45_2.png'). This two index labeling is commonly used for |
|---|
| 1013 | bursts of images (index |
|---|
| 1014 | j) separated by longer time intervals (index i). It can be |
|---|
| 1015 | also |
|---|
| 1016 | used for successive volume scanning by a laser sheet, with index j |
|---|
| 1017 | representing the position in the volume and i the time. <li><span style="font-weight: bold;"><span style="font-style: italic;">Derived file indexing:</span></span> </li> |
|---|
| 1018 | |
|---|
| 1019 | |
|---|
| 1020 | |
|---|
| 1021 | |
|---|
| 1022 | New file series can result |
|---|
| 1023 | from the processing of |
|---|
| 1024 | primary series. For a processing involving each file sequentially, the |
|---|
| 1025 | initial file index is naturally reproduced in the output series with |
|---|
| 1026 | one to one correspondence. |
|---|
| 1027 | |
|---|
| 1028 | |
|---|
| 1029 | |
|---|
| 1030 | <p> |
|---|
| 1031 | Other processing can involve file pairs, for |
|---|
| 1032 | instance Particle Imaging Velocity producing a velocity field from an |
|---|
| 1033 | image pair. In a simple series, the result from the two primary fields |
|---|
| 1034 | *_<span style="font-style: italic;">i</span>1 and *_<span style="font-style: italic;">i</span>2 is then labeled |
|---|
| 1035 | as *_<span style="font-style: italic;">i</span>1-<span style="font-style: italic;">i</span>2 with the file |
|---|
| 1036 | extension indicating the output format. More generally, |
|---|
| 1037 | the result from any processing involving |
|---|
| 1038 | a range of primary indices <span style="font-style: italic;">i</span>1 |
|---|
| 1039 | to <span style="font-style: italic;">i</span>2 |
|---|
| 1040 | is labeled as |
|---|
| 1041 | _<span style="font-style: italic;">i</span>1-<span style="font-style: italic;">i</span>2.</p> |
|---|
| 1042 | |
|---|
| 1043 | |
|---|
| 1044 | |
|---|
| 1045 | |
|---|
| 1046 | |
|---|
| 1047 | |
|---|
| 1048 | |
|---|
| 1049 | <p> |
|---|
| 1050 | The same rule applies for double series. |
|---|
| 1051 | For instance the file resulting from the comparison of the images 'root_<em>i</em>_<em>j</em>1.ext' |
|---|
| 1052 | and 'root_<em>i</em>_<em>j2</em>.ext' is called |
|---|
| 1053 | 'root_<em>i</em>_<em>j</em>1-<em>j</em>2.nc', |
|---|
| 1054 | while the result from the images 'root_<em>i</em>1_<em>j</em>.ext' |
|---|
| 1055 | and 'root_<em>i</em>2_<em>j</em>.ext' is called |
|---|
| 1056 | 'root_<em>i</em>1-<em>i</em>2_<em>j</em>.nc'. More |
|---|
| 1057 | generally, a file resulting from any processing involving |
|---|
| 1058 | a range of primary indices<span style="font-style: italic;"> |
|---|
| 1059 | i</span>1 to<span style="font-style: italic;"> i</span>2 |
|---|
| 1060 | and <span style="font-style: italic;">j</span>1 to<span style="font-style: italic;"> j</span>2 is labeled as |
|---|
| 1061 | *_<span style="font-style: italic;">i</span>1-<span style="font-style: italic;">i</span>2_j1-<span style="font-style: italic;">j</span>2. For instance, |
|---|
| 1062 | this can be the result of the averaging from i1 to i2 of the |
|---|
| 1063 | velocity fields 'root_<em>i</em>_<em>j</em>1-<em>j</em>2.nc' |
|---|
| 1064 | obtained from image pairs <span style="font-style: italic;">j</span>1-<span style="font-style: italic;">j</span>2 inside a |
|---|
| 1065 | burst. </p> |
|---|
| 1066 | |
|---|
| 1067 | |
|---|
| 1068 | |
|---|
| 1069 | |
|---|
| 1070 | |
|---|
| 1071 | |
|---|
| 1072 | |
|---|
| 1073 | <p> |
|---|
| 1074 | This derived file series is preferably stored in |
|---|
| 1075 | a subdirectory of the primary file series, to clearly indicate the |
|---|
| 1076 | filiation. Then the documentation file of the primary series also apply |
|---|
| 1077 | to the derived one (for instance calibration data). In addition, a |
|---|
| 1078 | specific documentation file named root.xml, containing the processing |
|---|
| 1079 | parameters, can be introduced in the sub-directory by the |
|---|
| 1080 | processing |
|---|
| 1081 | program </p> |
|---|
| 1082 | |
|---|
| 1083 | |
|---|
| 1084 | |
|---|
| 1085 | |
|---|
| 1086 | |
|---|
| 1087 | |
|---|
| 1088 | |
|---|
| 1089 | <p> |
|---|
| 1090 | For scanning (index incrementing) among files series with derived |
|---|
| 1091 | indexing, for instance *_<em>i</em>1-<em>i</em>2_<em>j</em>, |
|---|
| 1092 | the 'reference |
|---|
| 1093 | index' is used, defined as the integer part of the mean index |
|---|
| 1094 | (<span style="font-style: italic;">i</span>1+<span style="font-style: italic;">i</span>2)/2). </p> |
|---|
| 1095 | |
|---|
| 1096 | |
|---|
| 1097 | |
|---|
| 1098 | |
|---|
| 1099 | </ul> |
|---|
| 1100 | |
|---|
| 1101 | |
|---|
| 1102 | |
|---|
| 1103 | |
|---|
| 1104 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId729818"></a> |
|---|
| 1105 | <span style="font-weight: bold; font-style: italic;">Cyclic |
|---|
| 1106 | indexing:</span> it is |
|---|
| 1107 | sometimes useful to change file indices in a cyclic way as the field |
|---|
| 1108 | number is increased. For that purpose we use the convention that when |
|---|
| 1109 | the root name ends in the form [root '_xx' 'mmmm' ], |
|---|
| 1110 | where xx is a number and 'mmmm' a string of four letters beginning |
|---|
| 1111 | with m (like 'mask' or 'mean'), then the file number is taken modulo |
|---|
| 1112 | xx . This is convenient to visualize a mask for each slice or for |
|---|
| 1113 | subtracting a field average calculated on each slice. <br> |
|---|
| 1114 | |
|---|
| 1115 | |
|---|
| 1116 | |
|---|
| 1117 | |
|---|
| 1118 | <br> |
|---|
| 1119 | |
|---|
| 1120 | |
|---|
| 1121 | |
|---|
| 1122 | |
|---|
| 1123 | <span style="font-weight: bold;"><span style="font-style: italic;">Old nomenclature:</span> </span>double |
|---|
| 1124 | image series (bursts) were previously labeled by 3 digit |
|---|
| 1125 | number |
|---|
| 1126 | and a letter, for instance 'Exp1/aa045b.png'. PIV results from images a |
|---|
| 1127 | and b were then represented as Exp1/A/aa045ab.nc. This older |
|---|
| 1128 | nomenclature is still handled but not recommended. |
|---|
| 1129 | </div> |
|---|
| 1130 | |
|---|
| 1131 | |
|---|
| 1132 | |
|---|
| 1133 | |
|---|
| 1134 | <p style="text-align: justify;"><span style="font-weight: bold; font-style: italic;">Relevant |
|---|
| 1135 | Matlab functions:</span> |
|---|
| 1136 | the file name is determined by the functions <a href="FUNCTIONS_DOC/name_generator.html"><span style="text-decoration: underline;">name_generator.m</span></a><span style="font-weight: bold;"><span style="text-decoration: underline;"> |
|---|
| 1137 | </span></span>from a root name, indices and a nomenclature |
|---|
| 1138 | type |
|---|
| 1139 | ('_i', '_i_j'...). The reverse operation, splitting a name into a root |
|---|
| 1140 | and indices and detecting the nomenclature type, is performed |
|---|
| 1141 | by <a href="FUNCTIONS_DOC/name2display.html"><span style="text-decoration: underline;">name2display.m</span></a>. |
|---|
| 1142 | Other file nomenclatures could be defined by |
|---|
| 1143 | consistently changing these two inverse functions. </p> |
|---|
| 1144 | |
|---|
| 1145 | |
|---|
| 1146 | |
|---|
| 1147 | |
|---|
| 1148 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId596391"></a><a name="netcdf5"></a><a name="netcdf4"></a>2.2 |
|---|
| 1149 | Comparing two fields:</h2> |
|---|
| 1150 | |
|---|
| 1151 | |
|---|
| 1152 | |
|---|
| 1153 | |
|---|
| 1154 | <p style="text-align: justify;"> A second field series can be opened and compared to the first one, using |
|---|
| 1155 | the menu bar <span style="font-weight: bold;">Open_1</span>. |
|---|
| 1156 | When this box is activated, the current input file name |
|---|
| 1157 | is copied in the second line of input file. Then a new file name and |
|---|
| 1158 | indices appear on the second line, as well as the check box <span style="font-weight: bold;">SubField</span>. The two file series will be scanned |
|---|
| 1159 | simultaneously, |
|---|
| 1160 | according to their own nomenclature.</p> |
|---|
| 1161 | |
|---|
| 1162 | |
|---|
| 1163 | |
|---|
| 1164 | |
|---|
| 1165 | <p style="text-align: justify;"> |
|---|
| 1166 | If the two files are both images or scalar, their difference |
|---|
| 1167 | is introduced |
|---|
| 1168 | as the input field. If the second file is an image (or scalar), while |
|---|
| 1169 | the first |
|---|
| 1170 | one is |
|---|
| 1171 | a vector field, the image will appear as a background in the vector |
|---|
| 1172 | field. This is convenient for instance to relate the CIV result to |
|---|
| 1173 | the quality of the raw image, or to relate vorticity to the vector |
|---|
| 1174 | field. This option is also activated by the check box <strong>mask</strong>, |
|---|
| 1175 | to visualize the mask as a background image in the velocity field, |
|---|
| 1176 | see<strong> </strong><a href="uvmat_doc.html#Makemask">Makemask</a> |
|---|
| 1177 | for details.</p> |
|---|
| 1178 | |
|---|
| 1179 | |
|---|
| 1180 | |
|---|
| 1181 | |
|---|
| 1182 | <p style="text-align: justify;"> |
|---|
| 1183 | It is also possible to visualize an |
|---|
| 1184 | image pair as a small movie by simultaneously |
|---|
| 1185 | writting the field numbers <em>i1</em> and <em>i2</em>, |
|---|
| 1186 | or <em>j1</em> |
|---|
| 1187 | and <em>j2</em> (or the letters a,b for the 'png_old' |
|---|
| 1188 | nomenclature) |
|---|
| 1189 | in each line, and selecting the checkbox '<strong>-</strong>' |
|---|
| 1190 | between |
|---|
| 1191 | the two lines of field numbers, see also <a href="uvmat_doc.html#view_images">3.1</a>. </p> |
|---|
| 1192 | |
|---|
| 1193 | |
|---|
| 1194 | |
|---|
| 1195 | |
|---|
| 1196 | <p style="text-align: justify;"> |
|---|
| 1197 | If the two files are vector fields, their difference is taken |
|---|
| 1198 | as |
|---|
| 1199 | the input field, and is then displayed and analysed. If the two |
|---|
| 1200 | fields are not at the same points, the velocities of the second field |
|---|
| 1201 | are linearly interpolated at the positions of the first one (using |
|---|
| 1202 | the Matlab function <b>griddata</b>) . </p> |
|---|
| 1203 | |
|---|
| 1204 | |
|---|
| 1205 | |
|---|
| 1206 | |
|---|
| 1207 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId383799"></a><a name="netcdf5"></a><a name="netcdf4"></a>2.3 |
|---|
| 1208 | Documentation files (.xml):</h2> |
|---|
| 1209 | |
|---|
| 1210 | |
|---|
| 1211 | |
|---|
| 1212 | |
|---|
| 1213 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId500238"></a> |
|---|
| 1214 | When a new root name is |
|---|
| 1215 | introduced, a |
|---|
| 1216 | documentation file is automatically sought, whose path and name are |
|---|
| 1217 | displayed by <span style="font-weight: bold;">RootPath</span> |
|---|
| 1218 | and <span style="font-weight: bold;">RootFile </span>respectively, |
|---|
| 1219 | with extension .xml. This file contains information on timing for image |
|---|
| 1220 | series, geometric calibration and various information on the camera and |
|---|
| 1221 | illumination. The structure of the documentation file is constrained by |
|---|
| 1222 | an xml schema, <span style="text-decoration: underline;">XML_SCHEMAS/ImaDoc.xsd</span>. |
|---|
| 1223 | The following information is directly used by uvmat:<br> |
|---|
| 1224 | |
|---|
| 1225 | |
|---|
| 1226 | |
|---|
| 1227 | |
|---|
| 1228 | </div> |
|---|
| 1229 | |
|---|
| 1230 | |
|---|
| 1231 | |
|---|
| 1232 | |
|---|
| 1233 | <ul style="text-align: justify;"> |
|---|
| 1234 | |
|---|
| 1235 | |
|---|
| 1236 | |
|---|
| 1237 | |
|---|
| 1238 | <li><span style="font-weight: bold; font-style: italic;">Timing</span> |
|---|
| 1239 | of each file with index i and j in the series. This time is displayed |
|---|
| 1240 | for in the text box <span style="font-weight: bold;">abs_time</span> |
|---|
| 1241 | at the upper right of the interface (the corresponding unit is stored |
|---|
| 1242 | in the text box <span style="font-weight: bold;">TimeUnit</span>). |
|---|
| 1243 | The second text box <span style="font-weight: bold;">abs_time_1</span> |
|---|
| 1244 | is used when a second file series is introduced (the same |
|---|
| 1245 | time |
|---|
| 1246 | unit must be used)**. In the absence of time information in the |
|---|
| 1247 | documentation file, uvmat reads the time in each input file, |
|---|
| 1248 | if |
|---|
| 1249 | available. </li> |
|---|
| 1250 | |
|---|
| 1251 | |
|---|
| 1252 | |
|---|
| 1253 | |
|---|
| 1254 | <li><span style="font-weight: bold; font-style: italic;">Geometric |
|---|
| 1255 | calibration:</span> |
|---|
| 1256 | this includes coefficients of transforms from image to |
|---|
| 1257 | physical |
|---|
| 1258 | coordinates. For multiplane scanning it also describes the set |
|---|
| 1259 | of |
|---|
| 1260 | laser planes. Then the current plane index is indicated by the text box |
|---|
| 1261 | <span style="font-weight: bold;">z_index</span> |
|---|
| 1262 | and the total number of planes by the text box <span style="font-weight: bold;">nb_slice</span>. </li> |
|---|
| 1263 | |
|---|
| 1264 | |
|---|
| 1265 | |
|---|
| 1266 | |
|---|
| 1267 | <li><span style="font-style: italic; font-weight: bold;">File |
|---|
| 1268 | path: </span> the |
|---|
| 1269 | path to the current file can be recalled by a heading with elements |
|---|
| 1270 | 'Device' (not mandatory), 'Exp', 'Project' (or alternatively |
|---|
| 1271 | 'Campaign'). This means that the path RootPath should end as |
|---|
| 1272 | Project/Exp/Device. Discrepancy is indicated by a warning message, |
|---|
| 1273 | which may be evidence for misplaced data files. If a |
|---|
| 1274 | consistent |
|---|
| 1275 | path is read, the current Matlab working directory is moved to |
|---|
| 1276 | Project/0_MATLAB_WORK (it is created if it does not exist yet). Then |
|---|
| 1277 | all figures and functions created during data processing of this |
|---|
| 1278 | project are written in this directory by default. This is convenient |
|---|
| 1279 | when the same data set is analysed from different computers and/or by |
|---|
| 1280 | different users. Note that the uvmat interface keeps |
|---|
| 1281 | its Matlab working directory in memory, and it returns to it |
|---|
| 1282 | at |
|---|
| 1283 | each activation of the <span style="font-weight: bold;">run0 |
|---|
| 1284 | </span>command. </li> |
|---|
| 1285 | |
|---|
| 1286 | |
|---|
| 1287 | |
|---|
| 1288 | |
|---|
| 1289 | </ul> |
|---|
| 1290 | |
|---|
| 1291 | |
|---|
| 1292 | |
|---|
| 1293 | |
|---|
| 1294 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId826472"></a> |
|---|
| 1295 | The xml documentation file is read by |
|---|
| 1296 | the function <span style="text-decoration: underline;">read_imadoc.m</span>. |
|---|
| 1297 | If this file does not exist, a file with the same root name but |
|---|
| 1298 | extension .civ is read by the function <span style="text-decoration: underline;">read_imatext.m. </span>This |
|---|
| 1299 | function can be modified to account for any user defined |
|---|
| 1300 | format. |
|---|
| 1301 | In the absence of any documentation file, uvmat reads timing |
|---|
| 1302 | information directly on the input file in the case of avi movies or |
|---|
| 1303 | NetCDF files. |
|---|
| 1304 | The information read when a new root name is introduced is stored in |
|---|
| 1305 | the uvmat interface as |
|---|
| 1306 | 'UserData' .<br> |
|---|
| 1307 | |
|---|
| 1308 | |
|---|
| 1309 | |
|---|
| 1310 | |
|---|
| 1311 | <br> |
|---|
| 1312 | |
|---|
| 1313 | |
|---|
| 1314 | |
|---|
| 1315 | |
|---|
| 1316 | </div> |
|---|
| 1317 | |
|---|
| 1318 | |
|---|
| 1319 | |
|---|
| 1320 | |
|---|
| 1321 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId962678"></a><a name="navigation"></a>2.4 |
|---|
| 1322 | Navigation among file |
|---|
| 1323 | indices:</h2> |
|---|
| 1324 | |
|---|
| 1325 | |
|---|
| 1326 | |
|---|
| 1327 | |
|---|
| 1328 | <p style="text-align: justify;"> |
|---|
| 1329 | The field indices can be |
|---|
| 1330 | incremented or decremented by the push buttons <span style="font-weight: bold;">runplus</span> ( '<span style="font-weight: bold;">-></span>') |
|---|
| 1331 | and <span style="font-weight: bold;">runmin</span> |
|---|
| 1332 | ('<span style="font-weight: bold;"><-</span>') |
|---|
| 1333 | respectively. This scanning is performed over the |
|---|
| 1334 | first |
|---|
| 1335 | index (i) or the second one (j), depending on the selection of the |
|---|
| 1336 | check boxes <span style="font-weight: bold;">scan_i |
|---|
| 1337 | </span>or <span style="font-weight: bold;">scan_j</span> |
|---|
| 1338 | respectively. The step for increment is set by the edit box <span style="font-weight: bold;">increment_scan</span>. </p> |
|---|
| 1339 | |
|---|
| 1340 | |
|---|
| 1341 | |
|---|
| 1342 | |
|---|
| 1343 | <p style="text-align: justify;"> The current |
|---|
| 1344 | indices are displayed in the four edit |
|---|
| 1345 | boxes <span style="font-weight: bold;">i1, i2, j1, j2</span>. |
|---|
| 1346 | The two first indices i1 and j1 are used for image series, while the |
|---|
| 1347 | second line i2, j2 is used to label the image pairs used for PIV data. |
|---|
| 1348 | The file indices can be directly set in these edit boxes, or |
|---|
| 1349 | equivalently in the edit box <span style="font-weight: bold;">FileIndex</span> |
|---|
| 1350 | at the top of the interface. The maximum value of each index is |
|---|
| 1351 | indicated by the edit boxes <span style="font-weight: bold;">last_i</span> |
|---|
| 1352 | and <span style="font-weight: bold;">last_j</span> |
|---|
| 1353 | respectively, filled from the xml documentation file.</p> |
|---|
| 1354 | |
|---|
| 1355 | |
|---|
| 1356 | |
|---|
| 1357 | |
|---|
| 1358 | <p style="text-align: justify;"> |
|---|
| 1359 | In the case of a second input |
|---|
| 1360 | field (check box <span style="font-weight: bold;">SubField</span> |
|---|
| 1361 | activated), the corresponding file indices <span style="font-weight: bold;">FileIndex_1 </span>is also |
|---|
| 1362 | updated by <span style="font-weight: bold;">runplus</span> |
|---|
| 1363 | ( '<span style="font-weight: bold;">-></span>') |
|---|
| 1364 | and <span style="font-weight: bold;">runmin</span> |
|---|
| 1365 | ('<span style="font-weight: bold;"><-</span>') |
|---|
| 1366 | , so the indices of both fields remain synchronized by default. It is |
|---|
| 1367 | however possible to manually edit <span style="font-weight: bold;">FieldIndex_1</span> |
|---|
| 1368 | to compare two fields with different indices. </p> |
|---|
| 1369 | |
|---|
| 1370 | |
|---|
| 1371 | |
|---|
| 1372 | |
|---|
| 1373 | <p style="text-align: justify;"> |
|---|
| 1374 | For navigation with index |
|---|
| 1375 | pairs, the reference index, defined as the |
|---|
| 1376 | integer part of the mean value ((j1+j2)/2), is incremented. If the |
|---|
| 1377 | check box <span style="font-weight: bold;">fix_pair</span> |
|---|
| 1378 | is |
|---|
| 1379 | selected, the difference j1-j2 is then imposed while the |
|---|
| 1380 | reference index is incremented. Else the pair with appropriate |
|---|
| 1381 | reference index is searched. In the case of multiple choices, the most |
|---|
| 1382 | recent file is chosen. This allows to scan successive fields obtained |
|---|
| 1383 | with different image pairs (to match changing velocity of the |
|---|
| 1384 | fluid). </p> |
|---|
| 1385 | |
|---|
| 1386 | |
|---|
| 1387 | |
|---|
| 1388 | |
|---|
| 1389 | <p style="text-align: justify;"> |
|---|
| 1390 | Fields can be |
|---|
| 1391 | continuously scanned as a movie by pressing the push button <span style="font-weight: bold;">RunMovie </span>( '<span style="font-weight: bold;">--></span>')<span style="font-weight: bold;"> </span>instead of <span style="font-weight: bold;">runplus</span> ( '<span style="font-weight: bold;">-></span>'). |
|---|
| 1392 | Press <span style="font-weight: bold;">STOP</span> |
|---|
| 1393 | to stop the movie. The movie speed can be |
|---|
| 1394 | controlled by the slider <b>movie speed</b>. The movie can |
|---|
| 1395 | be extracted and recorded as an avi file, by activating the menu bar <span style="font-weight: bold;">Export/make movie avi</span>.<br> |
|---|
| 1396 | |
|---|
| 1397 | |
|---|
| 1398 | |
|---|
| 1399 | |
|---|
| 1400 | </p> |
|---|
| 1401 | |
|---|
| 1402 | |
|---|
| 1403 | |
|---|
| 1404 | |
|---|
| 1405 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId130904"></a><a name="netcdf5"></a><a name="netcdf4"></a>2.5 |
|---|
| 1406 | Ancillary input files:</h2> |
|---|
| 1407 | |
|---|
| 1408 | |
|---|
| 1409 | |
|---|
| 1410 | |
|---|
| 1411 | <ul style="text-align: justify;"> |
|---|
| 1412 | |
|---|
| 1413 | |
|---|
| 1414 | |
|---|
| 1415 | |
|---|
| 1416 | <li>Masks: The mask image |
|---|
| 1417 | can be displayed in 'uvmat' by selecting the check box <strong>view mask</strong> |
|---|
| 1418 | on the upper right. If the .png file with |
|---|
| 1419 | appropriate name is available in the image directory. In case of |
|---|
| 1420 | mutiple levels, the number of slices detected (xx in the mask name) |
|---|
| 1421 | is displayed in the edit box <strong>nb_slice </strong>on |
|---|
| 1422 | the upper |
|---|
| 1423 | left (nb_slice is set in priority by the xml file ImaDoc so a warning |
|---|
| 1424 | message should appear in case of conflict<span style="font-style: italic;">*</span>*).<br> |
|---|
| 1425 | |
|---|
| 1426 | |
|---|
| 1427 | |
|---|
| 1428 | |
|---|
| 1429 | </li> |
|---|
| 1430 | |
|---|
| 1431 | |
|---|
| 1432 | |
|---|
| 1433 | |
|---|
| 1434 | </ul> |
|---|
| 1435 | |
|---|
| 1436 | |
|---|
| 1437 | |
|---|
| 1438 | |
|---|
| 1439 | <ul style="text-align: justify;"> |
|---|
| 1440 | |
|---|
| 1441 | |
|---|
| 1442 | |
|---|
| 1443 | |
|---|
| 1444 | <li> |
|---|
| 1445 | |
|---|
| 1446 | |
|---|
| 1447 | |
|---|
| 1448 | <p style="margin-bottom: 0cm;">'.civ' file. name 'root |
|---|
| 1449 | .civ', ascii text file containing the calibration and the list of image |
|---|
| 1450 | times. This file is automatically sought by 'uvmat' and 'civ' when an |
|---|
| 1451 | image is opened by the file input browser. It must be stored in the |
|---|
| 1452 | same directory as the corresponding series of images. The scaling in |
|---|
| 1453 | pixel/cm (<b>pxcm</b> and <b>pycm</b> in x and |
|---|
| 1454 | y directions), the number of pixels of the image in both directions (<b>npx</b> |
|---|
| 1455 | and <b>npy</b>) are read in the .civ file, see <a href="http://www.civproject.org/documentation/fileformat">http://www.civproject.org/documentation/fileformat</a> |
|---|
| 1456 | for details on the file format. </p> |
|---|
| 1457 | |
|---|
| 1458 | |
|---|
| 1459 | |
|---|
| 1460 | |
|---|
| 1461 | </li> |
|---|
| 1462 | |
|---|
| 1463 | |
|---|
| 1464 | |
|---|
| 1465 | |
|---|
| 1466 | <li> |
|---|
| 1467 | |
|---|
| 1468 | |
|---|
| 1469 | |
|---|
| 1470 | <p style="margin-bottom: 0cm;">'.cmx' text files, |
|---|
| 1471 | containing the parameters sent to the CIV fortran programmes. The name |
|---|
| 1472 | is obtained by replacing the result file extension '.nc' by '.cmx'. </p> |
|---|
| 1473 | |
|---|
| 1474 | |
|---|
| 1475 | |
|---|
| 1476 | |
|---|
| 1477 | </li> |
|---|
| 1478 | |
|---|
| 1479 | |
|---|
| 1480 | |
|---|
| 1481 | |
|---|
| 1482 | <li> |
|---|
| 1483 | |
|---|
| 1484 | |
|---|
| 1485 | |
|---|
| 1486 | <p style="margin-bottom: 0cm;">'.log' text files, |
|---|
| 1487 | containing information about the CIV or PATCH processing. The name is |
|---|
| 1488 | obtained by replacing the result file extension '.nc' by '.log' or |
|---|
| 1489 | '_patch.log'. </p> |
|---|
| 1490 | |
|---|
| 1491 | |
|---|
| 1492 | |
|---|
| 1493 | |
|---|
| 1494 | </li> |
|---|
| 1495 | |
|---|
| 1496 | |
|---|
| 1497 | |
|---|
| 1498 | |
|---|
| 1499 | <li> |
|---|
| 1500 | |
|---|
| 1501 | |
|---|
| 1502 | |
|---|
| 1503 | <p>'.fig' Matlab figures, which represent plots but also |
|---|
| 1504 | Graphic User Interfaces (GUI). In that case matlab functions |
|---|
| 1505 | (Callbacks) are attached to the graphic objects on the figure and can |
|---|
| 1506 | be activated by the mouse. When the 'civ' interface is run, its present |
|---|
| 1507 | state is saved as a figure named 'root _ SUBDIR <em>i1</em> |
|---|
| 1508 | - <em>i2</em> .fig', in the base directory, where SUBDIR |
|---|
| 1509 | is the subdirectory containing the .nc files, <em>i1</em> |
|---|
| 1510 | and <em>i2</em> are the first and last numbers in the |
|---|
| 1511 | processed image series. </p> |
|---|
| 1512 | |
|---|
| 1513 | |
|---|
| 1514 | |
|---|
| 1515 | |
|---|
| 1516 | </li> |
|---|
| 1517 | |
|---|
| 1518 | |
|---|
| 1519 | |
|---|
| 1520 | |
|---|
| 1521 | </ul> |
|---|
| 1522 | |
|---|
| 1523 | |
|---|
| 1524 | |
|---|
| 1525 | |
|---|
| 1526 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId764268"></a> |
|---|
| 1527 | </div> |
|---|
| 1528 | |
|---|
| 1529 | |
|---|
| 1530 | |
|---|
| 1531 | |
|---|
| 1532 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId314695"></a><a name="view_field"></a>3 |
|---|
| 1533 | Field representation (uvmat): </h1> |
|---|
| 1534 | |
|---|
| 1535 | |
|---|
| 1536 | |
|---|
| 1537 | |
|---|
| 1538 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 1539 | |
|---|
| 1540 | |
|---|
| 1541 | |
|---|
| 1542 | |
|---|
| 1543 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId923709"></a> |
|---|
| 1544 | The uvmat interface primarily reads and visualises |
|---|
| 1545 | two-dimensional fields, which can be images or scalars, or vector |
|---|
| 1546 | fields. |
|---|
| 1547 | </div> |
|---|
| 1548 | |
|---|
| 1549 | |
|---|
| 1550 | |
|---|
| 1551 | |
|---|
| 1552 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId187440"></a><a name="view_images"></a><b>3.1 |
|---|
| 1553 | Images and scalars:</b></h2> |
|---|
| 1554 | |
|---|
| 1555 | |
|---|
| 1556 | |
|---|
| 1557 | |
|---|
| 1558 | <p style="text-align: justify;"> |
|---|
| 1559 | Images are matrices of |
|---|
| 1560 | integers, visualised by the |
|---|
| 1561 | <span style="text-decoration: underline;">imagesc.m</span> |
|---|
| 1562 | Matlab function. </p> |
|---|
| 1563 | |
|---|
| 1564 | |
|---|
| 1565 | |
|---|
| 1566 | |
|---|
| 1567 | <p style="text-align: justify;"> |
|---|
| 1568 | True color images are described |
|---|
| 1569 | by a matrix A(nx,ny,3) of integers |
|---|
| 1570 | between 0 and 255, the last index labeling the color component red, |
|---|
| 1571 | green or blue. They are displayed directly as color images.</p> |
|---|
| 1572 | |
|---|
| 1573 | |
|---|
| 1574 | |
|---|
| 1575 | |
|---|
| 1576 | <p style="text-align: justify;"> |
|---|
| 1577 | The black and white (B/W) |
|---|
| 1578 | images are described by a matrix A(nx,ny,1) of |
|---|
| 1579 | integers, whose range depends on the camera dynamics (0 to 255 for 8 |
|---|
| 1580 | bit images, 0 to 65535 for 16 bit images). They are represented with |
|---|
| 1581 | grey levels, according to the colorbar displayed on the right. The |
|---|
| 1582 | luminosity and contrast can be adjusted using the edit boxes<b> |
|---|
| 1583 | AMin</b> and <b>AMax </b>on the right of the |
|---|
| 1584 | interface:<b> |
|---|
| 1585 | </b>the luminosity level <strong>AMin</strong> (and |
|---|
| 1586 | levels below) is |
|---|
| 1587 | represented as black, and the luminosity level <strong>AMax</strong> |
|---|
| 1588 | (or levels above) as white. Selecting the <strong>AutoScal</strong> |
|---|
| 1589 | check box, <strong>AMin</strong> and <span style="font-weight: bold;">AMax</span> are set |
|---|
| 1590 | automatically to the |
|---|
| 1591 | image minimum and maximum respectively. Then the image may appear |
|---|
| 1592 | dark if a single point is very bright, in that case unselect the |
|---|
| 1593 | option <strong>AutoScal</strong>, and choose a lower value |
|---|
| 1594 | for <strong>AMax</strong>.</p> |
|---|
| 1595 | |
|---|
| 1596 | |
|---|
| 1597 | |
|---|
| 1598 | |
|---|
| 1599 | <p style="text-align: justify;"> |
|---|
| 1600 | Two images can be visually |
|---|
| 1601 | compared by switching back and forth |
|---|
| 1602 | between them as a short movie. This is quite useful to get a visual |
|---|
| 1603 | feeling of the image correlation. This effect is obtained by |
|---|
| 1604 | introducing two image numbers in the edit boxes <span style="font-weight: bold;">j1</span> and <span style="font-weight: bold;">j2</span>, and |
|---|
| 1605 | selecting the checkbox <span style="font-weight: bold;">fix_pair</span> |
|---|
| 1606 | (<span style="font-weight: bold;">'|'</span>) |
|---|
| 1607 | between the two lines of field numbers. |
|---|
| 1608 | The speed of the movie can be adjusted by the slider <span style="font-weight: bold;">speed</span> which then |
|---|
| 1609 | appears. Press <strong>STOP</strong> to stop the |
|---|
| 1610 | motion. </p> |
|---|
| 1611 | |
|---|
| 1612 | |
|---|
| 1613 | |
|---|
| 1614 | |
|---|
| 1615 | <p style="text-align: justify;"> |
|---|
| 1616 | Scalar fields are |
|---|
| 1617 | represented like B/W |
|---|
| 1618 | images, but with with a false color map ranging from blue (minimum |
|---|
| 1619 | values) to red (maximum). They can be alternatively displayed |
|---|
| 1620 | as B/W images by the check box <span style="font-weight: bold;">auto_scalar</span> ('<span style="font-weight: bold;">B/W</span>') |
|---|
| 1621 | (to test**). Other false color maps can be introduced by the standard |
|---|
| 1622 | Matlab figure menu Edit/Colormap , after extracting the figure with |
|---|
| 1623 | 'EXTRACT PLOT'.<br> |
|---|
| 1624 | |
|---|
| 1625 | |
|---|
| 1626 | |
|---|
| 1627 | |
|---|
| 1628 | Scalar are represented by matrices with real |
|---|
| 1629 | ('double') values, unlike images which are integers. They can be |
|---|
| 1630 | alternatively defined with unstructured grid: they are then linearly |
|---|
| 1631 | interpolated on a regular grid before plotting (which is a fairly slow |
|---|
| 1632 | process). </p> |
|---|
| 1633 | |
|---|
| 1634 | |
|---|
| 1635 | |
|---|
| 1636 | |
|---|
| 1637 | <p style="text-align: justify;"> |
|---|
| 1638 | The x,y coordinates, image |
|---|
| 1639 | value, and pixel |
|---|
| 1640 | indices i and j are displayed on the upper right, when the mouse is |
|---|
| 1641 | moved on the image. To extract the image visualize |
|---|
| 1642 | it by |
|---|
| 1643 | yourselves, click on it with the mouse riight button, then type |
|---|
| 1644 | 'image(CurData.AX,CurData.AY,CurData.A)' on the Matlab |
|---|
| 1645 | workspace. </p> |
|---|
| 1646 | |
|---|
| 1647 | |
|---|
| 1648 | |
|---|
| 1649 | |
|---|
| 1650 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId794224"></a><a name="velocity"></a>3.2 |
|---|
| 1651 | <a name="vectors"></a>Vectors:</h2> |
|---|
| 1652 | |
|---|
| 1653 | |
|---|
| 1654 | |
|---|
| 1655 | |
|---|
| 1656 | <p style="text-align: justify;"> |
|---|
| 1657 | The vector fields are represented as arrows. The length of the |
|---|
| 1658 | arrows can be automatically adjusted (checkbox <span style="font-weight: bold;">AutoVec</span> selected), |
|---|
| 1659 | or |
|---|
| 1660 | manually set by the edit box <span style="font-weight: bold;">VecScale</span>. |
|---|
| 1661 | </p> |
|---|
| 1662 | |
|---|
| 1663 | |
|---|
| 1664 | |
|---|
| 1665 | |
|---|
| 1666 | <p style="text-align: justify;"> |
|---|
| 1667 | Colors represent scalars associated with the vectors. With the |
|---|
| 1668 | default option 'ima_cor', the value of the image correlation (vec_C) |
|---|
| 1669 | is represented by a code with three colors. The red values correspond |
|---|
| 1670 | to poor correlations, green to fair values, and blue to good ones. The |
|---|
| 1671 | value range covered by each of the three colors is set by the pair of |
|---|
| 1672 | sliders on the upper right. </p> |
|---|
| 1673 | |
|---|
| 1674 | |
|---|
| 1675 | |
|---|
| 1676 | |
|---|
| 1677 | <p style="text-align: justify;"> |
|---|
| 1678 | Other color representations can be specified by the menu on |
|---|
| 1679 | the |
|---|
| 1680 | upper right. 'Black' and 'white' provides arrows with this fixed |
|---|
| 1681 | color. The other options provide a choice of scalars, for instance |
|---|
| 1682 | the vector norm ('norm_vec') or vorticity ('vort'). The list of |
|---|
| 1683 | available scalars is set by the function <a href="FUNCTIONS_DOC/calc_scal.html">calc_scal.m</a>. A |
|---|
| 1684 | quasi-continuous color representation with 64 levels can be used |
|---|
| 1685 | instead of the three colors by mouse clicking the color band between |
|---|
| 1686 | the two sliders. A second click switches back to the three color |
|---|
| 1687 | representation. The color thresholds can be relative to the min-max |
|---|
| 1688 | scalar values or remain fixed, depending on the 'auto' check box on |
|---|
| 1689 | the upper right.</p> |
|---|
| 1690 | |
|---|
| 1691 | |
|---|
| 1692 | |
|---|
| 1693 | |
|---|
| 1694 | <p style="text-align: justify;"> |
|---|
| 1695 | If the option <b>show flags</b> is selected, the |
|---|
| 1696 | correlation |
|---|
| 1697 | colors are taken over by flag colors indicating dubious or false |
|---|
| 1698 | vectors. False vectors are detected by various criteria: they |
|---|
| 1699 | are not removed from the files but marqued by flags, so that the |
|---|
| 1700 | process is reversible. By default these vectors are displayed in |
|---|
| 1701 | magenta, and they can be just removed from the view by deselecting |
|---|
| 1702 | the option <b>magenta on</b>. But in all cases these <b>magenta |
|---|
| 1703 | vectors are</b> <b>not taken into account</b> in |
|---|
| 1704 | processing: they are |
|---|
| 1705 | ignored in statistics or replaced by interpolation from neighboors |
|---|
| 1706 | when needed, in particular to get the fields <b>interp</b> |
|---|
| 1707 | or <b>filter</b> |
|---|
| 1708 | on a regular grid. The black color indicates some warning from the |
|---|
| 1709 | CIV process, but the corresponding vectors are taken into account in |
|---|
| 1710 | the processing (see the <b>FIX </b>in the <b>civ </b>interface |
|---|
| 1711 | or the |
|---|
| 1712 | <b>ACTION</b> <b>fix_vel </b>to |
|---|
| 1713 | remove dubious vectors using |
|---|
| 1714 | different criteria). The display of black color can be desactivated |
|---|
| 1715 | by unselecting the option <b>show black</b>. Then their |
|---|
| 1716 | correlation |
|---|
| 1717 | color is seen. </p> |
|---|
| 1718 | |
|---|
| 1719 | |
|---|
| 1720 | |
|---|
| 1721 | |
|---|
| 1722 | <p style="text-align: justify;"> |
|---|
| 1723 | One can also use the same mouse operation to display |
|---|
| 1724 | information |
|---|
| 1725 | on any vector in the text window on the upper right (there will be no |
|---|
| 1726 | change in the data if the pushbutton <b>record</b> is not |
|---|
| 1727 | pressed). |
|---|
| 1728 | These are the position coordinates vec_X and vec_Y, the velocity |
|---|
| 1729 | components vec_U and vec_V, the correlation vec_C, and flags vec_F |
|---|
| 1730 | and FixFlag in case of anomaly. Their meaning is explained below. </p> |
|---|
| 1731 | |
|---|
| 1732 | |
|---|
| 1733 | |
|---|
| 1734 | |
|---|
| 1735 | <p style="text-align: justify;"> |
|---|
| 1736 | The fields <b>interp</b> and <b>filter</b> |
|---|
| 1737 | are interpolations from |
|---|
| 1738 | several vectors, so they bear no color information (and cannot be |
|---|
| 1739 | removed by the mouse). If a first velocity field civ1 or civ2 |
|---|
| 1740 | is substracted to a second field (by activating the two fields |
|---|
| 1741 | simultaneously or by using the pushbutton <b><font color="#ff0000">-</font></b><font color="#330000">)</font><font color="#000000">,the |
|---|
| 1742 | colors are set by the first field, and the removed vectors of field 2 |
|---|
| 1743 | are not taken into account for the interpolation to the grid points |
|---|
| 1744 | of the first field.</font> </p> |
|---|
| 1745 | |
|---|
| 1746 | |
|---|
| 1747 | |
|---|
| 1748 | |
|---|
| 1749 | <p style="text-align: justify;"> |
|---|
| 1750 | The current vector field information can be made available in the |
|---|
| 1751 | Command |
|---|
| 1752 | window by clicking with the right mouse button in the |
|---|
| 1753 | plot. |
|---|
| 1754 | To plot the vector field |
|---|
| 1755 | by yourselves type |
|---|
| 1756 | 'quiver(CurData.X,CurData.Y,CurData.U,CurData.V)'. To remove the false |
|---|
| 1757 | vectors, type 'index=find(CurData.FF~=0)' to select the |
|---|
| 1758 | appropriate |
|---|
| 1759 | vector indices , |
|---|
| 1760 | then 'quiver(CurData.X(index),CurData.Y(index),CurData.U(index),CurData.V(index))'. |
|---|
| 1761 | </p> |
|---|
| 1762 | |
|---|
| 1763 | |
|---|
| 1764 | |
|---|
| 1765 | |
|---|
| 1766 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId172527"></a> |
|---|
| 1767 | <span style="font-style: italic; font-weight: bold;">Manual |
|---|
| 1768 | editing of vectors: </span> One can manually remove a |
|---|
| 1769 | vector with the mouse. First |
|---|
| 1770 | activate |
|---|
| 1771 | the <span style="font-weight: bold;">edit_vect</span> |
|---|
| 1772 | push button. A selected vector becomes magenta. Inversely, if a magenta |
|---|
| 1773 | vector is selected, it is rehabilitated and retrieve its initial |
|---|
| 1774 | color. The corrections are recorded as false flags |
|---|
| 1775 | in the |
|---|
| 1776 | data file by pressing the |
|---|
| 1777 | pushbutton <b>record</b>. |
|---|
| 1778 | </div> |
|---|
| 1779 | |
|---|
| 1780 | |
|---|
| 1781 | |
|---|
| 1782 | |
|---|
| 1783 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId356208"></a><a name="netcdf5"></a><a name="netcdf4"></a>3.3 |
|---|
| 1784 | Selecting fields from CIVx files:</h2> |
|---|
| 1785 | |
|---|
| 1786 | |
|---|
| 1787 | |
|---|
| 1788 | |
|---|
| 1789 | <p style="text-align: justify;"> |
|---|
| 1790 | The uvmat package recognizes the NetCDF |
|---|
| 1791 | fields obtained from the CIVx software (see **ref). This |
|---|
| 1792 | includes |
|---|
| 1793 | the velocity fields and their spatial derivatives, |
|---|
| 1794 | as well as information about the CIV processing (correlation values |
|---|
| 1795 | and flags). The content of any NetCDF file can be checked directly by |
|---|
| 1796 | the Matlab command <b>ncbrowser</b>, or by the GUI <span style="text-decoration: underline;">get_field.fig</span>. |
|---|
| 1797 | The vorticity, |
|---|
| 1798 | divergence, or |
|---|
| 1799 | strain are read in the same NetCDF files, but are available only after |
|---|
| 1800 | a <b>PATCH</b> operation has been run |
|---|
| 1801 | in the CIVx |
|---|
| 1802 | software. |
|---|
| 1803 | </p> |
|---|
| 1804 | |
|---|
| 1805 | |
|---|
| 1806 | |
|---|
| 1807 | |
|---|
| 1808 | <p style="text-align: justify;"> |
|---|
| 1809 | One of the field options <b>civ1, interp1</b> and |
|---|
| 1810 | <b>filter1, |
|---|
| 1811 | civ2, interp2</b> and <b>filter2</b> can be chosen, |
|---|
| 1812 | using the check |
|---|
| 1813 | boxes on the left. The first CIV processing is visualized by the CIV1 |
|---|
| 1814 | option. Then <strong>filter1 </strong>and<strong> |
|---|
| 1815 | interp1</strong> |
|---|
| 1816 | fields are interpolated on a regular grid, with or without smoothing |
|---|
| 1817 | respectively. It allows to fill holes and get spatial derivatives. If |
|---|
| 1818 | a scalar depending on spatial derivatives, like <strong>vort</strong>, |
|---|
| 1819 | is selected, the field option switches automatically from civ2 or |
|---|
| 1820 | interp2 to filter2, from civ1 or interp1 to filter2. If a refined CIV |
|---|
| 1821 | processing has been realised, it can be visualized by <b>civ2, |
|---|
| 1822 | patch2, filter2</b>. If more than two iterations have been |
|---|
| 1823 | performed, |
|---|
| 1824 | only the last two are stored, with the names civ1 and 2. </p> |
|---|
| 1825 | |
|---|
| 1826 | |
|---|
| 1827 | |
|---|
| 1828 | |
|---|
| 1829 | <p style="text-align: justify;"> |
|---|
| 1830 | If no field option is selected, it will be automatically |
|---|
| 1831 | chosen. |
|---|
| 1832 | For velocity, 'civ2' is chosen in priority, or 'civ1' if it does not |
|---|
| 1833 | exist. For scalar fields, like vort, 'filter2' is chosen in priority, |
|---|
| 1834 | or 'filter1' if it does not exist. This choice is motivated by the |
|---|
| 1835 | fact that civ2 results are supposedly better than civ1, that the |
|---|
| 1836 | velocity fields are most reliably defined by the uninterpolated civ |
|---|
| 1837 | fileds, while filter is needed for spatial derivatives. </p> |
|---|
| 1838 | |
|---|
| 1839 | |
|---|
| 1840 | |
|---|
| 1841 | |
|---|
| 1842 | <p style="text-align: justify;"> |
|---|
| 1843 | The choice of field names in the .nc file is set by the |
|---|
| 1844 | function |
|---|
| 1845 | 'varname_generator.m' of the UVMAT toolbox.</p> |
|---|
| 1846 | |
|---|
| 1847 | |
|---|
| 1848 | |
|---|
| 1849 | |
|---|
| 1850 | <p style="text-align: justify;"> |
|---|
| 1851 | The reading and calculation of scalars from the NetCDF files |
|---|
| 1852 | is |
|---|
| 1853 | done by the function 'UVMAT/calc_scal.m'. New scalars can be defined |
|---|
| 1854 | by modifying this function. They will appear in the <strong>FIELDS</strong> |
|---|
| 1855 | menu as a submenu <strong>scalar</strong>.The same scalars |
|---|
| 1856 | can be |
|---|
| 1857 | also displayed as colors of the vectors.</p> |
|---|
| 1858 | |
|---|
| 1859 | |
|---|
| 1860 | |
|---|
| 1861 | |
|---|
| 1862 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId271098"></a>3.4 Succession of operations:</h2> |
|---|
| 1863 | |
|---|
| 1864 | |
|---|
| 1865 | |
|---|
| 1866 | |
|---|
| 1867 | The following succession of operations is performed by uvmat.fig:<span style="font-style: italic; font-weight: bold;"></span><br> |
|---|
| 1868 | |
|---|
| 1869 | |
|---|
| 1870 | |
|---|
| 1871 | |
|---|
| 1872 | <span style="font-style: italic; font-weight: bold;">Reading: |
|---|
| 1873 | </span>The input field is first read from the input file by the |
|---|
| 1874 | function <a href="FUNCTIONS_DOC/read_ncfield.html"><span style="text-decoration: underline;">read_ncfield.m</span></a> |
|---|
| 1875 | or <a href="FUNCTIONS_DOC/read_image.html"><span style="text-decoration: underline;">read_image.m</span></a>. |
|---|
| 1876 | <br> |
|---|
| 1877 | |
|---|
| 1878 | |
|---|
| 1879 | |
|---|
| 1880 | |
|---|
| 1881 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId298394"></a> |
|---|
| 1882 | <span style="font-weight: bold; font-style: italic;">Transform: |
|---|
| 1883 | </span>a |
|---|
| 1884 | transform can be systematically applied just after reading, for |
|---|
| 1885 | instance to take into account geometric calibration. The processing |
|---|
| 1886 | function is set by the menu <span style="font-weight: bold;">menu_coord</span> |
|---|
| 1887 | on the left. With the default 'phys' option, the input field is |
|---|
| 1888 | transformed (by the function <a href="FUNCTIONS_DOC/phys.html">phys.m</a>) |
|---|
| 1889 | if it contains the key 'CoordType' with value 'raw' (or 'px'), else it |
|---|
| 1890 | is left unchanged. Similarly, a reverse transform to image coordinates |
|---|
| 1891 | is performed if the input file contains the key 'CoordType' with value |
|---|
| 1892 | 'phys'. </div> |
|---|
| 1893 | |
|---|
| 1894 | |
|---|
| 1895 | |
|---|
| 1896 | |
|---|
| 1897 | Note that this transform can be |
|---|
| 1898 | also performed |
|---|
| 1899 | pointwise when moving the mouse. In 3D cases, the initial 3D |
|---|
| 1900 | coordinates are given by the mouse, while the plot axis correspond to |
|---|
| 1901 | the coordinates of the current plane.<br> |
|---|
| 1902 | |
|---|
| 1903 | |
|---|
| 1904 | |
|---|
| 1905 | |
|---|
| 1906 | Other transform functions can be made, |
|---|
| 1907 | following the examples in the subdirectories IMA_TRANSFORMS and |
|---|
| 1908 | VEL_TRANSFORMS. |
|---|
| 1909 | <br> |
|---|
| 1910 | |
|---|
| 1911 | |
|---|
| 1912 | |
|---|
| 1913 | |
|---|
| 1914 | <br> |
|---|
| 1915 | |
|---|
| 1916 | |
|---|
| 1917 | |
|---|
| 1918 | |
|---|
| 1919 | <span style="font-weight: bold; font-style: italic;">Scalar |
|---|
| 1920 | calculation: </span><span style="font-style: italic;"></span>a |
|---|
| 1921 | scalar can be calculated from the input data, as selected by |
|---|
| 1922 | the menu <span style="font-weight: bold;">Fields</span>. |
|---|
| 1923 | It is then mapped as an image, or represented by contours (selecting |
|---|
| 1924 | the check box <span style="font-weight: bold;">contour</span> |
|---|
| 1925 | in the frame <span style="font-weight: bold;">SCAL</span>). |
|---|
| 1926 | If a vector field is plotted, a scalar can be |
|---|
| 1927 | alternatively represented as arrow color, as described in |
|---|
| 1928 | section 3.2. |
|---|
| 1929 | <br> |
|---|
| 1930 | |
|---|
| 1931 | |
|---|
| 1932 | |
|---|
| 1933 | |
|---|
| 1934 | <br> |
|---|
| 1935 | |
|---|
| 1936 | |
|---|
| 1937 | |
|---|
| 1938 | |
|---|
| 1939 | <span style="font-weight: bold; font-style: italic;">Comparison:</span> |
|---|
| 1940 | when two fields of the same nature are introduced, the difference is |
|---|
| 1941 | taken by the function <span style="text-decoration: underline;">subfield.m</span>. |
|---|
| 1942 | <br> |
|---|
| 1943 | |
|---|
| 1944 | |
|---|
| 1945 | |
|---|
| 1946 | |
|---|
| 1947 | <br> |
|---|
| 1948 | |
|---|
| 1949 | |
|---|
| 1950 | |
|---|
| 1951 | |
|---|
| 1952 | <span style="font-weight: bold; font-style: italic;">Projection: |
|---|
| 1953 | </span>on the projection object, see section 5. |
|---|
| 1954 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId274690"></a></div> |
|---|
| 1955 | |
|---|
| 1956 | |
|---|
| 1957 | |
|---|
| 1958 | |
|---|
| 1959 | <span style="font-weight: bold; font-style: italic;">Plotting:</span> |
|---|
| 1960 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId599668"></a></div> |
|---|
| 1961 | |
|---|
| 1962 | |
|---|
| 1963 | |
|---|
| 1964 | |
|---|
| 1965 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId901896"></a>3.5 |
|---|
| 1966 | Histograms</h2> |
|---|
| 1967 | |
|---|
| 1968 | |
|---|
| 1969 | |
|---|
| 1970 | |
|---|
| 1971 | <p style="text-align: justify;">Histograms of the input |
|---|
| 1972 | fields are represented on the |
|---|
| 1973 | bottom left. The choice of the variable is done by the menus <span style="font-weight: bold;">histo1_menu</span> and <span style="font-weight: bold;">histo2_menu</span>. |
|---|
| 1974 | </p> |
|---|
| 1975 | |
|---|
| 1976 | |
|---|
| 1977 | |
|---|
| 1978 | |
|---|
| 1979 | <p style="text-align: justify;"> For color |
|---|
| 1980 | images, the |
|---|
| 1981 | histogram of each color component, r, g, b, is given with a curve of |
|---|
| 1982 | the corresponding color. In case of saturation, the proportion of |
|---|
| 1983 | pixels beyond the <b>max</b> limit is written on the graph.</p> |
|---|
| 1984 | |
|---|
| 1985 | |
|---|
| 1986 | |
|---|
| 1987 | |
|---|
| 1988 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId107014"></a> |
|---|
| 1989 | </div> |
|---|
| 1990 | |
|---|
| 1991 | |
|---|
| 1992 | |
|---|
| 1993 | |
|---|
| 1994 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId472013"></a>3.6 |
|---|
| 1995 | Viewing volume fields:**</h2> |
|---|
| 1996 | |
|---|
| 1997 | |
|---|
| 1998 | |
|---|
| 1999 | |
|---|
| 2000 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId757221"></a> |
|---|
| 2001 | not yet implemented</div> |
|---|
| 2002 | |
|---|
| 2003 | |
|---|
| 2004 | |
|---|
| 2005 | |
|---|
| 2006 | <br> |
|---|
| 2007 | |
|---|
| 2008 | |
|---|
| 2009 | |
|---|
| 2010 | |
|---|
| 2011 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId71913"></a><a name="get_field" class="mozTocH1"></a>4 The |
|---|
| 2012 | GUI get_field.fig:</h1> |
|---|
| 2013 | |
|---|
| 2014 | |
|---|
| 2015 | |
|---|
| 2016 | |
|---|
| 2017 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 2018 | |
|---|
| 2019 | |
|---|
| 2020 | |
|---|
| 2021 | |
|---|
| 2022 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId515715"></a> |
|---|
| 2023 | <h2><a class="mozTocH2" name="mozTocId539613"></a>4.1 |
|---|
| 2024 | Overview:</h2> |
|---|
| 2025 | |
|---|
| 2026 | |
|---|
| 2027 | |
|---|
| 2028 | |
|---|
| 2029 | This GUI is designed to analyse a NetCDF |
|---|
| 2030 | file, |
|---|
| 2031 | showing all the variables, attributes and variable dimensions. |
|---|
| 2032 | Variables can be selected and plotted. The GUI is opened by the prompt |
|---|
| 2033 | command 'get_field' or |
|---|
| 2034 | 'get_field (input)', where 'input' is a NetCDF file name or a Matlab |
|---|
| 2035 | structure with the appropriate content. It is also opened by |
|---|
| 2036 | the |
|---|
| 2037 | GUI <span style="text-decoration: underline;">uvmat.fig</span> |
|---|
| 2038 | when an input NetCDF file does contain recognized variables. |
|---|
| 2039 | Finally the GUI <a href="FUNCTIONS_DOC/get_field.html">get_field.m</a> |
|---|
| 2040 | is also opened by pressing the right mouse button |
|---|
| 2041 | on a current plotting axis, to display information on the corresponding |
|---|
| 2042 | fields. <br> |
|---|
| 2043 | |
|---|
| 2044 | |
|---|
| 2045 | |
|---|
| 2046 | |
|---|
| 2047 | When a NetCDF input file is |
|---|
| 2048 | entered, the names and |
|---|
| 2049 | value of the global attributes are listed in the left column <span style="font-weight: bold;">attributes</span>, the list |
|---|
| 2050 | of variables in the central column <span style="font-weight: bold;">variables</span>, |
|---|
| 2051 | and the list of dimension names and values in the right column <span style="font-weight: bold;">dimensions</span>. |
|---|
| 2052 | By selecting one of the variables in the central column, the |
|---|
| 2053 | corresponding variable attributes and dimensions are displayed in the |
|---|
| 2054 | left and right columns respectively. By a right button mouse click on the interface, |
|---|
| 2055 | the whole content of the NetCDF file can be made available on the |
|---|
| 2056 | Matlab prompt in the form of a Matlab structure 'CurData'. <br> |
|---|
| 2057 | |
|---|
| 2058 | |
|---|
| 2059 | |
|---|
| 2060 | |
|---|
| 2061 | Ordinary graphs: to make a simple graph, |
|---|
| 2062 | select the abscissa in the column <span style="font-weight: bold;">abscissa</span>, |
|---|
| 2063 | and a corresponding set of fields in the column <span style="font-weight: bold;">ordinate</span>, then press |
|---|
| 2064 | <span style="font-weight: bold;">PLOT</span>. |
|---|
| 2065 | If the variable is indexed with more than one dimension, plots of each |
|---|
| 2066 | component are made versus the first index (like with the <span style="text-decoration: underline;">plot</span> Matlab |
|---|
| 2067 | command). If no abscissa is selected ( blank selected at the top of <span style="font-weight: bold;">abscissa</span>), variables |
|---|
| 2068 | are plotted versus their (first) index . <br> |
|---|
| 2069 | |
|---|
| 2070 | |
|---|
| 2071 | |
|---|
| 2072 | |
|---|
| 2073 | Plots can be made in a new figure |
|---|
| 2074 | (default), or |
|---|
| 2075 | added to an existing one. The choice of available figures is available |
|---|
| 2076 | in the listbox menu <span style="font-weight: bold;">list_fig</span>. The full list of available plotting axes can be obtained in <span style="font-weight: bold;">list_fig</span> by pressing <span style="font-weight: bold;">browse_field</span>. |
|---|
| 2077 | <br> |
|---|
| 2078 | |
|---|
| 2079 | |
|---|
| 2080 | |
|---|
| 2081 | |
|---|
| 2082 | <h2><a class="mozTocH2" name="mozTocId665737"></a>4.2 |
|---|
| 2083 | 2D and 3D plots: </h2> |
|---|
| 2084 | |
|---|
| 2085 | |
|---|
| 2086 | |
|---|
| 2087 | |
|---|
| 2088 | 2D vector plots or scalar images can be |
|---|
| 2089 | made by |
|---|
| 2090 | selecting the check boxes <span style="font-weight: bold;">check_2D</span> |
|---|
| 2091 | or <span style="font-weight: bold;">check_scalar </span>respectively. |
|---|
| 2092 | Then select the appropriate variables representing the velocity |
|---|
| 2093 | components and/or the scalar, then the variables chosen as <span style="font-weight: bold;">abscissa</span>, |
|---|
| 2094 | <span style="font-weight: bold;">ordinate</span> and |
|---|
| 2095 | <span style="font-weight: bold;">z coordinate</span>. <br> |
|---|
| 2096 | |
|---|
| 2097 | |
|---|
| 2098 | If these coordinate variables correspond to |
|---|
| 2099 | one of the dimensions of the matrix selected as scalar or vector |
|---|
| 2100 | components, they will be used as structured coordinates. If they have |
|---|
| 2101 | the same dimensions as the matrix, they will be used as unstructured |
|---|
| 2102 | coordinates. If the blank option is selected for a coordinate, |
|---|
| 2103 | the corresponding matrix index is used as coordinate. <br> |
|---|
| 2104 | |
|---|
| 2105 | |
|---|
| 2106 | If the options <span style="font-weight: bold;">check_2D</span> and <span style="font-weight: bold;">check_scalar</span> are |
|---|
| 2107 | simultaenously selected, the scalar is represented as colors of the |
|---|
| 2108 | vector arrows. <br> |
|---|
| 2109 | |
|---|
| 2110 | |
|---|
| 2111 | The uvmat GUI is automatically |
|---|
| 2112 | opened when 2D |
|---|
| 2113 | or 3D fields are displayed, allowing us to adjust the plotting |
|---|
| 2114 | parameters. In 3D, a middle plane of cut is automatically selected. |
|---|
| 2115 | This can be moved then with the slider on the interface set_object (see |
|---|
| 2116 | section 5). The default cuts are made at constant z coordiante, but any |
|---|
| 2117 | of the three initial coordiantes can be used as z coordinate, using the |
|---|
| 2118 | menu <span style="font-weight: bold;">coord_z</span>. <br> |
|---|
| 2119 | |
|---|
| 2120 | |
|---|
| 2121 | Once uvmat is opened, navigations through file numbers is then possible, while |
|---|
| 2122 | keeping the same selection of plotted field variables. <br> |
|---|
| 2123 | |
|---|
| 2124 | |
|---|
| 2125 | |
|---|
| 2126 | |
|---|
| 2127 | <br> |
|---|
| 2128 | |
|---|
| 2129 | |
|---|
| 2130 | |
|---|
| 2131 | |
|---|
| 2132 | </div> |
|---|
| 2133 | |
|---|
| 2134 | |
|---|
| 2135 | |
|---|
| 2136 | |
|---|
| 2137 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId71913"></a><a name="ProjectionObject" class="mozTocH1"></a>5 |
|---|
| 2138 | Projection objects:</h1> |
|---|
| 2139 | |
|---|
| 2140 | |
|---|
| 2141 | |
|---|
| 2142 | |
|---|
| 2143 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 2144 | |
|---|
| 2145 | |
|---|
| 2146 | |
|---|
| 2147 | |
|---|
| 2148 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId113693"></a><a name="set_object"></a>5-1 |
|---|
| 2149 | Definition and editing with the uvmat interface:</h2> |
|---|
| 2150 | |
|---|
| 2151 | |
|---|
| 2152 | |
|---|
| 2153 | |
|---|
| 2154 | <p style="text-align: justify;"> |
|---|
| 2155 | These are geometrical objects |
|---|
| 2156 | used to define cuts |
|---|
| 2157 | along lines, or |
|---|
| 2158 | planes for 3D data, to interpolate fields on a regular grid, |
|---|
| 2159 | to |
|---|
| 2160 | restrict the |
|---|
| 2161 | visualization of fields and their analysis to subregions. See next |
|---|
| 2162 | subsection for details. Objects are |
|---|
| 2163 | created by selecting the appropriate creation buttons on the interface |
|---|
| 2164 | uvmat (lower right). This opens an auxiliary GUI <a href="FUNCTIONS_DOC/set_object.html"><span style="text-decoration: underline;">set_object.fig</span></a><span style="text-decoration: underline;"></span>. </p> |
|---|
| 2165 | |
|---|
| 2166 | |
|---|
| 2167 | |
|---|
| 2168 | |
|---|
| 2169 | <p style="text-align: justify;"> |
|---|
| 2170 | The list of current projection |
|---|
| 2171 | objects is |
|---|
| 2172 | displayed on the uvmat interface. Each field displayed by uvmat is |
|---|
| 2173 | projected on these current objects, and displayed in corresponding |
|---|
| 2174 | satellite figures. The projection of fields on objects is performed by |
|---|
| 2175 | the function <a href="FUNCTIONS_DOC/proj_field.html">proj_field.m</a>, |
|---|
| 2176 | which can be used also for instance in the GUI <a href="#series"><span style="text-decoration: underline;">series</span>.fig</a>. </p> |
|---|
| 2177 | |
|---|
| 2178 | |
|---|
| 2179 | |
|---|
| 2180 | |
|---|
| 2181 | <ul style="text-align: justify;"> |
|---|
| 2182 | |
|---|
| 2183 | |
|---|
| 2184 | |
|---|
| 2185 | |
|---|
| 2186 | <li>Creating objects: </li> |
|---|
| 2187 | |
|---|
| 2188 | |
|---|
| 2189 | |
|---|
| 2190 | |
|---|
| 2191 | </ul> |
|---|
| 2192 | |
|---|
| 2193 | |
|---|
| 2194 | |
|---|
| 2195 | |
|---|
| 2196 | Object can be interactively drawn with |
|---|
| 2197 | the mouse on |
|---|
| 2198 | the GUI uvmat . First activate the creation mode by selecting the |
|---|
| 2199 | appropriate item in the menu bar <span style="font-weight: bold;">Tools</span>. <br> |
|---|
| 2200 | |
|---|
| 2201 | |
|---|
| 2202 | |
|---|
| 2203 | |
|---|
| 2204 | -'points': mark points with mouse left |
|---|
| 2205 | button. Use |
|---|
| 2206 | right click to end the series. The list of coordinates appear on the |
|---|
| 2207 | set_object interface. These can be then manually edited, use <span style="font-weight: bold;">plot</span> on the GUI <a href="FUNCTIONS_DOC/set_object.html"><span style="text-decoration: underline;">set_object</span></a> |
|---|
| 2208 | to validate. The range of action can be set on the |
|---|
| 2209 | GUI <a href="FUNCTIONS_DOC/set_object.html"><span style="text-decoration: underline;">set_object</span></a> |
|---|
| 2210 | by the edit box <span style="font-weight: bold;">YMax</span> |
|---|
| 2211 | (only needed in the ProjMode 'projection'). This range is |
|---|
| 2212 | visualized by dashed circles around each point. The set of points can |
|---|
| 2213 | be determined from successive images (to track a feature for instance): |
|---|
| 2214 | for that purpose use the keyboard keys 'p' and 'm' to increament or |
|---|
| 2215 | decrement fields without the mouse. <br> |
|---|
| 2216 | |
|---|
| 2217 | |
|---|
| 2218 | |
|---|
| 2219 | |
|---|
| 2220 | -'line': just draw a line, keeping the mouse left |
|---|
| 2221 | button |
|---|
| 2222 | pressed, release to end. The range of action, set by YMax, is |
|---|
| 2223 | visualized by two dashed lines (only in ProjMode 'projection').<br> |
|---|
| 2224 | |
|---|
| 2225 | |
|---|
| 2226 | |
|---|
| 2227 | |
|---|
| 2228 | -'polyline': draw a line with several segments, |
|---|
| 2229 | press and |
|---|
| 2230 | release the mouse left button to mark each summit, press the right |
|---|
| 2231 | button to end the line.<br> |
|---|
| 2232 | |
|---|
| 2233 | |
|---|
| 2234 | |
|---|
| 2235 | |
|---|
| 2236 | -'rectangle': defined by its center, half width |
|---|
| 2237 | and half |
|---|
| 2238 | height.<br> |
|---|
| 2239 | |
|---|
| 2240 | |
|---|
| 2241 | |
|---|
| 2242 | |
|---|
| 2243 | -'polygon': closed line made of n consecutive |
|---|
| 2244 | segments |
|---|
| 2245 | (defined by n points)<br> |
|---|
| 2246 | |
|---|
| 2247 | |
|---|
| 2248 | |
|---|
| 2249 | |
|---|
| 2250 | -ellipse: defined by its center, half width and |
|---|
| 2251 | half |
|---|
| 2252 | height.<br> |
|---|
| 2253 | |
|---|
| 2254 | |
|---|
| 2255 | |
|---|
| 2256 | |
|---|
| 2257 | -plane: plane with associated |
|---|
| 2258 | cartesian |
|---|
| 2259 | coordinates<br> |
|---|
| 2260 | |
|---|
| 2261 | |
|---|
| 2262 | |
|---|
| 2263 | |
|---|
| 2264 | -volume: volume with associated cartesian |
|---|
| 2265 | coordinates |
|---|
| 2266 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId407637"></a></div> |
|---|
| 2267 | |
|---|
| 2268 | |
|---|
| 2269 | |
|---|
| 2270 | |
|---|
| 2271 | <ul style="text-align: justify;"> |
|---|
| 2272 | |
|---|
| 2273 | |
|---|
| 2274 | |
|---|
| 2275 | |
|---|
| 2276 | </ul> |
|---|
| 2277 | |
|---|
| 2278 | |
|---|
| 2279 | |
|---|
| 2280 | |
|---|
| 2281 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId624817"></a>5-2 |
|---|
| 2282 | Object properties:</h2> |
|---|
| 2283 | |
|---|
| 2284 | |
|---|
| 2285 | |
|---|
| 2286 | |
|---|
| 2287 | <p style="margin-bottom: 0cm; text-align: justify;"> |
|---|
| 2288 | The type of |
|---|
| 2289 | projection object is defined by a 'Style' and a projection |
|---|
| 2290 | mode |
|---|
| 2291 | 'ProjMode', whose possible options are listed in the |
|---|
| 2292 | table below. |
|---|
| 2293 | A 'TITLE', derived from these two properties, is also given |
|---|
| 2294 | for |
|---|
| 2295 | clarity. </p> |
|---|
| 2296 | |
|---|
| 2297 | |
|---|
| 2298 | |
|---|
| 2299 | |
|---|
| 2300 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId264298"></a></div> |
|---|
| 2301 | |
|---|
| 2302 | |
|---|
| 2303 | |
|---|
| 2304 | |
|---|
| 2305 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId440774"></a></div> |
|---|
| 2306 | |
|---|
| 2307 | |
|---|
| 2308 | |
|---|
| 2309 | |
|---|
| 2310 | <table style="width: 874px; height: 745px; text-align: left; margin-left: 0px; margin-right: 0px;" border="1" cellpadding="4" cellspacing="3"> |
|---|
| 2311 | |
|---|
| 2312 | |
|---|
| 2313 | |
|---|
| 2314 | |
|---|
| 2315 | <col width="43*"> <col width="43*"> <col width="43*"> <col width="43*"> <col width="43*"> <col width="43*"> <tbody> |
|---|
| 2316 | |
|---|
| 2317 | |
|---|
| 2318 | |
|---|
| 2319 | |
|---|
| 2320 | <tr valign="top"> |
|---|
| 2321 | |
|---|
| 2322 | |
|---|
| 2323 | |
|---|
| 2324 | |
|---|
| 2325 | <td width="17%"> |
|---|
| 2326 | |
|---|
| 2327 | |
|---|
| 2328 | |
|---|
| 2329 | <p><b>TITLE</b></p> |
|---|
| 2330 | |
|---|
| 2331 | |
|---|
| 2332 | |
|---|
| 2333 | |
|---|
| 2334 | </td> |
|---|
| 2335 | |
|---|
| 2336 | |
|---|
| 2337 | |
|---|
| 2338 | |
|---|
| 2339 | <td width="17%"> |
|---|
| 2340 | |
|---|
| 2341 | |
|---|
| 2342 | |
|---|
| 2343 | <p><b>Style</b></p> |
|---|
| 2344 | |
|---|
| 2345 | |
|---|
| 2346 | |
|---|
| 2347 | |
|---|
| 2348 | </td> |
|---|
| 2349 | |
|---|
| 2350 | |
|---|
| 2351 | |
|---|
| 2352 | |
|---|
| 2353 | <td width="17%"> |
|---|
| 2354 | |
|---|
| 2355 | |
|---|
| 2356 | |
|---|
| 2357 | <p style="width: 158px;"><b>ProjMode</b></p> |
|---|
| 2358 | |
|---|
| 2359 | |
|---|
| 2360 | |
|---|
| 2361 | |
|---|
| 2362 | </td> |
|---|
| 2363 | |
|---|
| 2364 | |
|---|
| 2365 | |
|---|
| 2366 | |
|---|
| 2367 | <td style="font-weight: bold;" width="17%"> |
|---|
| 2368 | |
|---|
| 2369 | |
|---|
| 2370 | |
|---|
| 2371 | <p>Resulting fields</p> |
|---|
| 2372 | |
|---|
| 2373 | |
|---|
| 2374 | |
|---|
| 2375 | |
|---|
| 2376 | </td> |
|---|
| 2377 | |
|---|
| 2378 | |
|---|
| 2379 | |
|---|
| 2380 | |
|---|
| 2381 | </tr> |
|---|
| 2382 | |
|---|
| 2383 | |
|---|
| 2384 | |
|---|
| 2385 | |
|---|
| 2386 | <tr> |
|---|
| 2387 | |
|---|
| 2388 | |
|---|
| 2389 | |
|---|
| 2390 | |
|---|
| 2391 | <td></td> |
|---|
| 2392 | |
|---|
| 2393 | |
|---|
| 2394 | |
|---|
| 2395 | |
|---|
| 2396 | <td></td> |
|---|
| 2397 | |
|---|
| 2398 | |
|---|
| 2399 | |
|---|
| 2400 | |
|---|
| 2401 | <td></td> |
|---|
| 2402 | |
|---|
| 2403 | |
|---|
| 2404 | |
|---|
| 2405 | |
|---|
| 2406 | <td></td> |
|---|
| 2407 | |
|---|
| 2408 | |
|---|
| 2409 | |
|---|
| 2410 | |
|---|
| 2411 | </tr> |
|---|
| 2412 | |
|---|
| 2413 | |
|---|
| 2414 | |
|---|
| 2415 | |
|---|
| 2416 | <tr valign="top"> |
|---|
| 2417 | |
|---|
| 2418 | |
|---|
| 2419 | |
|---|
| 2420 | |
|---|
| 2421 | <td width="17%"> |
|---|
| 2422 | |
|---|
| 2423 | |
|---|
| 2424 | |
|---|
| 2425 | <p>POINTS</p> |
|---|
| 2426 | |
|---|
| 2427 | |
|---|
| 2428 | |
|---|
| 2429 | |
|---|
| 2430 | </td> |
|---|
| 2431 | |
|---|
| 2432 | |
|---|
| 2433 | |
|---|
| 2434 | |
|---|
| 2435 | <td width="17%"> |
|---|
| 2436 | |
|---|
| 2437 | |
|---|
| 2438 | |
|---|
| 2439 | <p>points</p> |
|---|
| 2440 | |
|---|
| 2441 | |
|---|
| 2442 | |
|---|
| 2443 | |
|---|
| 2444 | </td> |
|---|
| 2445 | |
|---|
| 2446 | |
|---|
| 2447 | |
|---|
| 2448 | |
|---|
| 2449 | <td width="17%"> projection<br> |
|---|
| 2450 | |
|---|
| 2451 | |
|---|
| 2452 | |
|---|
| 2453 | |
|---|
| 2454 | interp<br> |
|---|
| 2455 | |
|---|
| 2456 | |
|---|
| 2457 | |
|---|
| 2458 | |
|---|
| 2459 | filter<br> |
|---|
| 2460 | |
|---|
| 2461 | |
|---|
| 2462 | |
|---|
| 2463 | |
|---|
| 2464 | none </td> |
|---|
| 2465 | |
|---|
| 2466 | |
|---|
| 2467 | |
|---|
| 2468 | |
|---|
| 2469 | <td width="17%"> |
|---|
| 2470 | |
|---|
| 2471 | |
|---|
| 2472 | |
|---|
| 2473 | <p>set of <span style="font-style: italic;">n</span> |
|---|
| 2474 | values of each field component, corresponding |
|---|
| 2475 | to the <span style="font-style: italic;">n</span> |
|---|
| 2476 | points of projection.</p> |
|---|
| 2477 | |
|---|
| 2478 | |
|---|
| 2479 | |
|---|
| 2480 | |
|---|
| 2481 | </td> |
|---|
| 2482 | |
|---|
| 2483 | |
|---|
| 2484 | |
|---|
| 2485 | |
|---|
| 2486 | </tr> |
|---|
| 2487 | |
|---|
| 2488 | |
|---|
| 2489 | |
|---|
| 2490 | |
|---|
| 2491 | <tr valign="top"> |
|---|
| 2492 | |
|---|
| 2493 | |
|---|
| 2494 | |
|---|
| 2495 | |
|---|
| 2496 | <td width="17%"> |
|---|
| 2497 | |
|---|
| 2498 | |
|---|
| 2499 | |
|---|
| 2500 | <p>LINE</p> |
|---|
| 2501 | |
|---|
| 2502 | |
|---|
| 2503 | |
|---|
| 2504 | |
|---|
| 2505 | </td> |
|---|
| 2506 | |
|---|
| 2507 | |
|---|
| 2508 | |
|---|
| 2509 | |
|---|
| 2510 | <td width="17%"> line<br> |
|---|
| 2511 | |
|---|
| 2512 | |
|---|
| 2513 | |
|---|
| 2514 | |
|---|
| 2515 | polyline<br> |
|---|
| 2516 | |
|---|
| 2517 | |
|---|
| 2518 | |
|---|
| 2519 | |
|---|
| 2520 | rectangle <br> |
|---|
| 2521 | |
|---|
| 2522 | |
|---|
| 2523 | |
|---|
| 2524 | |
|---|
| 2525 | polygon<br> |
|---|
| 2526 | |
|---|
| 2527 | |
|---|
| 2528 | |
|---|
| 2529 | |
|---|
| 2530 | ellipse </td> |
|---|
| 2531 | |
|---|
| 2532 | |
|---|
| 2533 | |
|---|
| 2534 | |
|---|
| 2535 | <td width="17%"> projection<br> |
|---|
| 2536 | |
|---|
| 2537 | |
|---|
| 2538 | |
|---|
| 2539 | |
|---|
| 2540 | interp<br> |
|---|
| 2541 | |
|---|
| 2542 | |
|---|
| 2543 | |
|---|
| 2544 | |
|---|
| 2545 | filter<br> |
|---|
| 2546 | |
|---|
| 2547 | |
|---|
| 2548 | |
|---|
| 2549 | |
|---|
| 2550 | none |
|---|
| 2551 | |
|---|
| 2552 | |
|---|
| 2553 | |
|---|
| 2554 | <p></p> |
|---|
| 2555 | |
|---|
| 2556 | |
|---|
| 2557 | |
|---|
| 2558 | |
|---|
| 2559 | </td> |
|---|
| 2560 | |
|---|
| 2561 | |
|---|
| 2562 | |
|---|
| 2563 | |
|---|
| 2564 | <td width="17%"> |
|---|
| 2565 | |
|---|
| 2566 | |
|---|
| 2567 | |
|---|
| 2568 | <p style="margin-bottom: 0cm;">profile of each |
|---|
| 2569 | field |
|---|
| 2570 | component (and mean value) along the line.</p> |
|---|
| 2571 | |
|---|
| 2572 | |
|---|
| 2573 | |
|---|
| 2574 | |
|---|
| 2575 | |
|---|
| 2576 | |
|---|
| 2577 | |
|---|
| 2578 | <p style="margin-bottom: 0cm;"> |
|---|
| 2579 | The |
|---|
| 2580 | vectors |
|---|
| 2581 | are projected along the line direction and its |
|---|
| 2582 | normal, providing the new x and y components respectively. </p> |
|---|
| 2583 | |
|---|
| 2584 | |
|---|
| 2585 | |
|---|
| 2586 | |
|---|
| 2587 | </td> |
|---|
| 2588 | |
|---|
| 2589 | |
|---|
| 2590 | |
|---|
| 2591 | |
|---|
| 2592 | </tr> |
|---|
| 2593 | |
|---|
| 2594 | |
|---|
| 2595 | |
|---|
| 2596 | |
|---|
| 2597 | <tr valign="top"> |
|---|
| 2598 | |
|---|
| 2599 | |
|---|
| 2600 | |
|---|
| 2601 | |
|---|
| 2602 | <td width="17%"> |
|---|
| 2603 | |
|---|
| 2604 | |
|---|
| 2605 | |
|---|
| 2606 | <p>PATCH</p> |
|---|
| 2607 | |
|---|
| 2608 | |
|---|
| 2609 | |
|---|
| 2610 | |
|---|
| 2611 | </td> |
|---|
| 2612 | |
|---|
| 2613 | |
|---|
| 2614 | |
|---|
| 2615 | |
|---|
| 2616 | <td width="17%"> rectangle<br> |
|---|
| 2617 | |
|---|
| 2618 | |
|---|
| 2619 | |
|---|
| 2620 | |
|---|
| 2621 | polygon<br> |
|---|
| 2622 | |
|---|
| 2623 | |
|---|
| 2624 | |
|---|
| 2625 | |
|---|
| 2626 | ellipse </td> |
|---|
| 2627 | |
|---|
| 2628 | |
|---|
| 2629 | |
|---|
| 2630 | |
|---|
| 2631 | <td width="17%"> |
|---|
| 2632 | |
|---|
| 2633 | |
|---|
| 2634 | |
|---|
| 2635 | <p>inside</p> |
|---|
| 2636 | |
|---|
| 2637 | |
|---|
| 2638 | |
|---|
| 2639 | |
|---|
| 2640 | |
|---|
| 2641 | |
|---|
| 2642 | |
|---|
| 2643 | <p>outside</p> |
|---|
| 2644 | |
|---|
| 2645 | |
|---|
| 2646 | |
|---|
| 2647 | |
|---|
| 2648 | </td> |
|---|
| 2649 | |
|---|
| 2650 | |
|---|
| 2651 | |
|---|
| 2652 | |
|---|
| 2653 | <td width="17%"> |
|---|
| 2654 | |
|---|
| 2655 | |
|---|
| 2656 | |
|---|
| 2657 | <p>histogram of each field component inside or outside |
|---|
| 2658 | the |
|---|
| 2659 | closed line + surface integral.</p> |
|---|
| 2660 | |
|---|
| 2661 | |
|---|
| 2662 | |
|---|
| 2663 | |
|---|
| 2664 | </td> |
|---|
| 2665 | |
|---|
| 2666 | |
|---|
| 2667 | |
|---|
| 2668 | |
|---|
| 2669 | </tr> |
|---|
| 2670 | |
|---|
| 2671 | |
|---|
| 2672 | |
|---|
| 2673 | |
|---|
| 2674 | <tr> |
|---|
| 2675 | <td>MASK</td> |
|---|
| 2676 | <td>polygon</td> |
|---|
| 2677 | <td>mask_inside<br> |
|---|
| 2678 | mask_outside</td> |
|---|
| 2679 | <td>no projection result. Object used to make masks.</td> |
|---|
| 2680 | </tr> |
|---|
| 2681 | <tr valign="top"> |
|---|
| 2682 | |
|---|
| 2683 | |
|---|
| 2684 | |
|---|
| 2685 | |
|---|
| 2686 | <td width="17%"> |
|---|
| 2687 | |
|---|
| 2688 | |
|---|
| 2689 | |
|---|
| 2690 | <p>PLANE</p> |
|---|
| 2691 | |
|---|
| 2692 | |
|---|
| 2693 | |
|---|
| 2694 | |
|---|
| 2695 | </td> |
|---|
| 2696 | |
|---|
| 2697 | |
|---|
| 2698 | |
|---|
| 2699 | |
|---|
| 2700 | <td width="17%"> |
|---|
| 2701 | |
|---|
| 2702 | |
|---|
| 2703 | |
|---|
| 2704 | <p>plane</p> |
|---|
| 2705 | |
|---|
| 2706 | |
|---|
| 2707 | |
|---|
| 2708 | |
|---|
| 2709 | </td> |
|---|
| 2710 | |
|---|
| 2711 | |
|---|
| 2712 | |
|---|
| 2713 | |
|---|
| 2714 | <td width="17%"> projection<br> |
|---|
| 2715 | |
|---|
| 2716 | |
|---|
| 2717 | |
|---|
| 2718 | |
|---|
| 2719 | interp<br> |
|---|
| 2720 | |
|---|
| 2721 | |
|---|
| 2722 | |
|---|
| 2723 | |
|---|
| 2724 | none </td> |
|---|
| 2725 | |
|---|
| 2726 | |
|---|
| 2727 | |
|---|
| 2728 | |
|---|
| 2729 | <td width="17%"> |
|---|
| 2730 | |
|---|
| 2731 | |
|---|
| 2732 | |
|---|
| 2733 | <p>2D field components. Vectors are |
|---|
| 2734 | projected in the plane (new x y components), and along the |
|---|
| 2735 | normal in 3D. </p> |
|---|
| 2736 | |
|---|
| 2737 | |
|---|
| 2738 | |
|---|
| 2739 | |
|---|
| 2740 | </td> |
|---|
| 2741 | |
|---|
| 2742 | |
|---|
| 2743 | |
|---|
| 2744 | |
|---|
| 2745 | </tr> |
|---|
| 2746 | |
|---|
| 2747 | |
|---|
| 2748 | |
|---|
| 2749 | |
|---|
| 2750 | <tr valign="top"> |
|---|
| 2751 | |
|---|
| 2752 | |
|---|
| 2753 | |
|---|
| 2754 | |
|---|
| 2755 | <td width="17%"> |
|---|
| 2756 | |
|---|
| 2757 | |
|---|
| 2758 | |
|---|
| 2759 | <p>VOLUME</p> |
|---|
| 2760 | |
|---|
| 2761 | |
|---|
| 2762 | |
|---|
| 2763 | |
|---|
| 2764 | </td> |
|---|
| 2765 | |
|---|
| 2766 | |
|---|
| 2767 | |
|---|
| 2768 | |
|---|
| 2769 | <td width="17%"> |
|---|
| 2770 | |
|---|
| 2771 | |
|---|
| 2772 | |
|---|
| 2773 | <p>volume</p> |
|---|
| 2774 | |
|---|
| 2775 | |
|---|
| 2776 | |
|---|
| 2777 | |
|---|
| 2778 | </td> |
|---|
| 2779 | |
|---|
| 2780 | |
|---|
| 2781 | |
|---|
| 2782 | |
|---|
| 2783 | <td width="17%"> |
|---|
| 2784 | |
|---|
| 2785 | |
|---|
| 2786 | |
|---|
| 2787 | <p>projection</p> |
|---|
| 2788 | |
|---|
| 2789 | |
|---|
| 2790 | |
|---|
| 2791 | |
|---|
| 2792 | |
|---|
| 2793 | |
|---|
| 2794 | |
|---|
| 2795 | <p>interp</p> |
|---|
| 2796 | |
|---|
| 2797 | |
|---|
| 2798 | |
|---|
| 2799 | |
|---|
| 2800 | |
|---|
| 2801 | |
|---|
| 2802 | |
|---|
| 2803 | <p>none</p> |
|---|
| 2804 | |
|---|
| 2805 | |
|---|
| 2806 | |
|---|
| 2807 | |
|---|
| 2808 | </td> |
|---|
| 2809 | |
|---|
| 2810 | |
|---|
| 2811 | |
|---|
| 2812 | |
|---|
| 2813 | <td width="17%"> |
|---|
| 2814 | |
|---|
| 2815 | |
|---|
| 2816 | |
|---|
| 2817 | <p>3D field components. Vectors are projected |
|---|
| 2818 | along the new coordinates attached to the |
|---|
| 2819 | volume . </p> |
|---|
| 2820 | |
|---|
| 2821 | |
|---|
| 2822 | |
|---|
| 2823 | |
|---|
| 2824 | </td> |
|---|
| 2825 | |
|---|
| 2826 | |
|---|
| 2827 | |
|---|
| 2828 | |
|---|
| 2829 | </tr> |
|---|
| 2830 | |
|---|
| 2831 | |
|---|
| 2832 | |
|---|
| 2833 | |
|---|
| 2834 | |
|---|
| 2835 | |
|---|
| 2836 | |
|---|
| 2837 | </tbody> |
|---|
| 2838 | </table> |
|---|
| 2839 | |
|---|
| 2840 | |
|---|
| 2841 | |
|---|
| 2842 | |
|---|
| 2843 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId596019"></a><br> |
|---|
| 2844 | |
|---|
| 2845 | |
|---|
| 2846 | |
|---|
| 2847 | |
|---|
| 2848 | </div> |
|---|
| 2849 | |
|---|
| 2850 | |
|---|
| 2851 | |
|---|
| 2852 | |
|---|
| 2853 | <ul style="text-align: justify;"> |
|---|
| 2854 | |
|---|
| 2855 | |
|---|
| 2856 | |
|---|
| 2857 | |
|---|
| 2858 | <li> |
|---|
| 2859 | |
|---|
| 2860 | |
|---|
| 2861 | |
|---|
| 2862 | <p style="margin-bottom: 0cm;"><strong>Style:</strong></p> |
|---|
| 2863 | |
|---|
| 2864 | |
|---|
| 2865 | |
|---|
| 2866 | |
|---|
| 2867 | |
|---|
| 2868 | |
|---|
| 2869 | |
|---|
| 2870 | <ul> |
|---|
| 2871 | |
|---|
| 2872 | |
|---|
| 2873 | |
|---|
| 2874 | |
|---|
| 2875 | <li>points: set of <span style="font-style: italic;">n</span> |
|---|
| 2876 | points</li> |
|---|
| 2877 | |
|---|
| 2878 | |
|---|
| 2879 | |
|---|
| 2880 | |
|---|
| 2881 | <li>line: simple straight segment, defined by its two end |
|---|
| 2882 | points</li> |
|---|
| 2883 | |
|---|
| 2884 | |
|---|
| 2885 | |
|---|
| 2886 | |
|---|
| 2887 | <li>polyline: open line made of <span style="font-style: italic;">n</span>-1 consecutive |
|---|
| 2888 | segments |
|---|
| 2889 | (defined by <span style="font-style: italic;">n</span> |
|---|
| 2890 | points)</li> |
|---|
| 2891 | |
|---|
| 2892 | |
|---|
| 2893 | |
|---|
| 2894 | |
|---|
| 2895 | <li>rectangle: defined by its center, half width and half |
|---|
| 2896 | height.</li> |
|---|
| 2897 | |
|---|
| 2898 | |
|---|
| 2899 | |
|---|
| 2900 | |
|---|
| 2901 | <li>polygon: closed line made of <span style="font-style: italic;">n</span> consecutive |
|---|
| 2902 | segments |
|---|
| 2903 | (defined by <span style="font-style: italic;">n</span> |
|---|
| 2904 | points)</li> |
|---|
| 2905 | |
|---|
| 2906 | |
|---|
| 2907 | |
|---|
| 2908 | |
|---|
| 2909 | <li>ellipse: defined by its center, half width and half |
|---|
| 2910 | height.</li> |
|---|
| 2911 | |
|---|
| 2912 | |
|---|
| 2913 | |
|---|
| 2914 | |
|---|
| 2915 | <li> plane: plane with associated cartesian |
|---|
| 2916 | coordinates</li> |
|---|
| 2917 | |
|---|
| 2918 | |
|---|
| 2919 | |
|---|
| 2920 | |
|---|
| 2921 | <li>volume: volume with associated cartesian coordinates</li> |
|---|
| 2922 | |
|---|
| 2923 | |
|---|
| 2924 | |
|---|
| 2925 | |
|---|
| 2926 | |
|---|
| 2927 | |
|---|
| 2928 | |
|---|
| 2929 | </ul> |
|---|
| 2930 | |
|---|
| 2931 | |
|---|
| 2932 | |
|---|
| 2933 | |
|---|
| 2934 | </li> |
|---|
| 2935 | |
|---|
| 2936 | |
|---|
| 2937 | |
|---|
| 2938 | |
|---|
| 2939 | <li> <strong>ProjMode: </strong><br> |
|---|
| 2940 | |
|---|
| 2941 | |
|---|
| 2942 | |
|---|
| 2943 | |
|---|
| 2944 | </li> |
|---|
| 2945 | |
|---|
| 2946 | |
|---|
| 2947 | |
|---|
| 2948 | |
|---|
| 2949 | It specifies the method of projection of coordinates and |
|---|
| 2950 | fields. |
|---|
| 2951 | |
|---|
| 2952 | |
|---|
| 2953 | |
|---|
| 2954 | <ul> |
|---|
| 2955 | |
|---|
| 2956 | |
|---|
| 2957 | |
|---|
| 2958 | |
|---|
| 2959 | <li>'projection': </li> |
|---|
| 2960 | |
|---|
| 2961 | |
|---|
| 2962 | |
|---|
| 2963 | |
|---|
| 2964 | Direct |
|---|
| 2965 | projection of the field data in a region of action |
|---|
| 2966 | around the object, as defined by the parameters 'RangeX', 'RangeY', |
|---|
| 2967 | "RangeZ'. For |
|---|
| 2968 | 'points', |
|---|
| 2969 | this region of action is a circle (or sphere in 3D) |
|---|
| 2970 | around each point. For 'line', 'polyline' or 'polygon', it is |
|---|
| 2971 | a |
|---|
| 2972 | band surrounding the line, and for 'plane' (in 3D cases), it is a layer |
|---|
| 2973 | around |
|---|
| 2974 | the plane (in the range Z=[-RangeZ RangeZ] with respect to the |
|---|
| 2975 | projection plane). <br> |
|---|
| 2976 | |
|---|
| 2977 | |
|---|
| 2978 | |
|---|
| 2979 | |
|---|
| 2980 | - For 'points': an average of all |
|---|
| 2981 | the |
|---|
| 2982 | (nonfalse) data points is made in each neighborhood, yielding a single |
|---|
| 2983 | field value (=NaN if all the data points are false). |
|---|
| 2984 | Each field component U (or U(:)) results in a projected field U(i) (or |
|---|
| 2985 | U(i,:)), with unstructured coordinates (X(i), Y(i)), i=1 to n.<br> |
|---|
| 2986 | |
|---|
| 2987 | |
|---|
| 2988 | |
|---|
| 2989 | |
|---|
| 2990 | - For |
|---|
| 2991 | 'line', 'polyline', 'rectangle' |
|---|
| 2992 | or 'polygon: each non-false data point in the region |
|---|
| 2993 | of |
|---|
| 2994 | action is projected |
|---|
| 2995 | onto the line. The direction |
|---|
| 2996 | of projection is normal |
|---|
| 2997 | except if 'Phi' is non equal to 0 (only possible for 'line'). For each |
|---|
| 2998 | field component U, a corresponding projected field U is produced. If DX |
|---|
| 2999 | is defined, a smoothed field |
|---|
| 3000 | Usmooth is also calculated, as well as the mean Umean along the |
|---|
| 3001 | line. <br> |
|---|
| 3002 | |
|---|
| 3003 | |
|---|
| 3004 | |
|---|
| 3005 | |
|---|
| 3006 | |
|---|
| 3007 | -For 'rectangle' and 'ellipse': option |
|---|
| 3008 | 'projection' not |
|---|
| 3009 | implemented<br> |
|---|
| 3010 | |
|---|
| 3011 | |
|---|
| 3012 | |
|---|
| 3013 | |
|---|
| 3014 | -For |
|---|
| 3015 | 'plane': each data point in the layer of action is projected normally |
|---|
| 3016 | to |
|---|
| 3017 | the plane, and its position expressed with respect to the new frame |
|---|
| 3018 | attached to the plane.<br> |
|---|
| 3019 | |
|---|
| 3020 | |
|---|
| 3021 | |
|---|
| 3022 | |
|---|
| 3023 | -For 'volume': |
|---|
| 3024 | each scalar data in the domain selected by 'RangeX, RangeY, RangeZ' is |
|---|
| 3025 | preserved, but |
|---|
| 3026 | their coordinates are expressed with respect to the new frame |
|---|
| 3027 | attached to the volume.<br> |
|---|
| 3028 | |
|---|
| 3029 | |
|---|
| 3030 | |
|---|
| 3031 | |
|---|
| 3032 | <li>'interp' :</li> |
|---|
| 3033 | |
|---|
| 3034 | |
|---|
| 3035 | |
|---|
| 3036 | |
|---|
| 3037 | Linear |
|---|
| 3038 | interpolation of the fields on a grid of regularly spaced points |
|---|
| 3039 | defined on the projection object, with meshes DX, DY, DZ. The grid |
|---|
| 3040 | array along x starts at RangeX(1) and ends at the closest value smaller |
|---|
| 3041 | than RangeX(2). Similar convention is used for y and z in case |
|---|
| 3042 | of planes and volumes. <li>'filter': </li> |
|---|
| 3043 | |
|---|
| 3044 | |
|---|
| 3045 | |
|---|
| 3046 | |
|---|
| 3047 | Filtered |
|---|
| 3048 | interpolation (used only for lines). For each point an average of the |
|---|
| 3049 | neighborhing data is used, with a weighting function whose range is |
|---|
| 3050 | given by max(RangeY). This is useful to get reliable profiles in the |
|---|
| 3051 | presence of |
|---|
| 3052 | 'holes' in the data fields. <li>'inside': |
|---|
| 3053 | defined only for rectangle, polygon, |
|---|
| 3054 | ellipse. |
|---|
| 3055 | For |
|---|
| 3056 | each field U, its probability distribution function Uhist of the field |
|---|
| 3057 | data inside the patch |
|---|
| 3058 | is calculated, as well as the mean Umean. </li> |
|---|
| 3059 | |
|---|
| 3060 | |
|---|
| 3061 | |
|---|
| 3062 | |
|---|
| 3063 | <li>'outside': defined only for rectangle, polygon, |
|---|
| 3064 | ellipse. |
|---|
| 3065 | The probability |
|---|
| 3066 | distribution function and mean of the field data outside the patch is |
|---|
| 3067 | given. </li> |
|---|
| 3068 | |
|---|
| 3069 | |
|---|
| 3070 | |
|---|
| 3071 | |
|---|
| 3072 | <li>'none', 'mask_inside', 'mask_outside': no projection operation. The object |
|---|
| 3073 | is used |
|---|
| 3074 | solely for plotting purpose (e. g. to show a boundary).</li> |
|---|
| 3075 | |
|---|
| 3076 | |
|---|
| 3077 | |
|---|
| 3078 | |
|---|
| 3079 | |
|---|
| 3080 | |
|---|
| 3081 | |
|---|
| 3082 | </ul> |
|---|
| 3083 | |
|---|
| 3084 | |
|---|
| 3085 | |
|---|
| 3086 | |
|---|
| 3087 | Note: when any averaging or interpolation process is involved, the only |
|---|
| 3088 | projected variables are scalars and vector components, excluding |
|---|
| 3089 | 'warnflag', 'errorflag', 'ancillary'. Those are only projected with the |
|---|
| 3090 | mode 'projection' on LINE, PLANE, VOLUME. <li><strong>CoordType:</strong> </li> |
|---|
| 3091 | |
|---|
| 3092 | |
|---|
| 3093 | |
|---|
| 3094 | |
|---|
| 3095 | type of coordinates used to describe |
|---|
| 3096 | the object, = 'phys' (physical), or 'raw' (pixels). It must |
|---|
| 3097 | fit with the coordinate type of the projected field. <li><strong>Coord:</strong></li> |
|---|
| 3098 | |
|---|
| 3099 | |
|---|
| 3100 | |
|---|
| 3101 | |
|---|
| 3102 | coordinates [x y z] (or [x y] in 2D) defining the object position. |
|---|
| 3103 | |
|---|
| 3104 | |
|---|
| 3105 | |
|---|
| 3106 | <ul> |
|---|
| 3107 | |
|---|
| 3108 | |
|---|
| 3109 | |
|---|
| 3110 | |
|---|
| 3111 | <li> for 'points', 'line', 'polyline', 'polygon': |
|---|
| 3112 | matrix with<span style="font-style: italic;"> n</span> |
|---|
| 3113 | lines [x<sub>i</sub> y<sub>i</sub> z<sub>i</sub>], |
|---|
| 3114 | corresponding to each of the <span style="font-style: italic;">n</span> |
|---|
| 3115 | defining points. Note that in 3D case, polygons must be included in a |
|---|
| 3116 | plane, which imposes restrictions on these coordinates. </li> |
|---|
| 3117 | |
|---|
| 3118 | |
|---|
| 3119 | |
|---|
| 3120 | |
|---|
| 3121 | <li>for 'rectangle', 'ellipse': coordinates of the |
|---|
| 3122 | center.</li> |
|---|
| 3123 | |
|---|
| 3124 | |
|---|
| 3125 | |
|---|
| 3126 | |
|---|
| 3127 | <li>for 'plane' or 'volume': coordinates of the |
|---|
| 3128 | origin of |
|---|
| 3129 | the new coordinate frame attached to the object.</li> |
|---|
| 3130 | |
|---|
| 3131 | |
|---|
| 3132 | |
|---|
| 3133 | |
|---|
| 3134 | |
|---|
| 3135 | |
|---|
| 3136 | |
|---|
| 3137 | </ul> |
|---|
| 3138 | |
|---|
| 3139 | |
|---|
| 3140 | |
|---|
| 3141 | |
|---|
| 3142 | <li><span style="font-weight: bold;">RangeX, |
|---|
| 3143 | RangeY,RangeZ:</span><br> |
|---|
| 3144 | |
|---|
| 3145 | |
|---|
| 3146 | |
|---|
| 3147 | |
|---|
| 3148 | scalars, or vectors of two real |
|---|
| 3149 | numbers, |
|---|
| 3150 | defining the range of action of the |
|---|
| 3151 | object along each dimension (default value=0) |
|---|
| 3152 | |
|---|
| 3153 | |
|---|
| 3154 | |
|---|
| 3155 | <ul> |
|---|
| 3156 | |
|---|
| 3157 | |
|---|
| 3158 | |
|---|
| 3159 | |
|---|
| 3160 | <li> for 'points': RangeX (or |
|---|
| 3161 | max(RangeX,RangeY,RangeZ)) is a scalar specifying |
|---|
| 3162 | the radius of action.</li> |
|---|
| 3163 | |
|---|
| 3164 | |
|---|
| 3165 | |
|---|
| 3166 | |
|---|
| 3167 | <li>for 'line', 'polyline', 'polygon': </li> |
|---|
| 3168 | |
|---|
| 3169 | |
|---|
| 3170 | |
|---|
| 3171 | |
|---|
| 3172 | - RangeY (or |
|---|
| 3173 | max(RangeY)) |
|---|
| 3174 | represents the half |
|---|
| 3175 | width of the projection band (needed for ProjMode= 'projection' |
|---|
| 3176 | or 'filter') |
|---|
| 3177 | - RangeX (or min(RangeX)) represents the |
|---|
| 3178 | abscissa of the line |
|---|
| 3179 | origin |
|---|
| 3180 | (first defining point) in the line coordinate (=0 by default) <li>for |
|---|
| 3181 | 'rectangle', 'ellipse':</li> |
|---|
| 3182 | |
|---|
| 3183 | |
|---|
| 3184 | |
|---|
| 3185 | |
|---|
| 3186 | -RangeX (or |
|---|
| 3187 | max(RangeX)): half |
|---|
| 3188 | width along x <br> |
|---|
| 3189 | |
|---|
| 3190 | |
|---|
| 3191 | |
|---|
| 3192 | |
|---|
| 3193 | -RangeY (or |
|---|
| 3194 | max(RangeY)): half |
|---|
| 3195 | width along y<br> |
|---|
| 3196 | |
|---|
| 3197 | |
|---|
| 3198 | |
|---|
| 3199 | |
|---|
| 3200 | |
|---|
| 3201 | -RangeZ (or max(RangeZ)): half |
|---|
| 3202 | width of the layer of action (in 3D) <li>for 'plane':</li> |
|---|
| 3203 | |
|---|
| 3204 | |
|---|
| 3205 | |
|---|
| 3206 | |
|---|
| 3207 | -min(RangeX), |
|---|
| 3208 | max(RangeX): min and max |
|---|
| 3209 | abscissa of the selected domain (in the plane coordinates) |
|---|
| 3210 | <br> |
|---|
| 3211 | |
|---|
| 3212 | |
|---|
| 3213 | |
|---|
| 3214 | |
|---|
| 3215 | -min(RangeY), |
|---|
| 3216 | max(RangeY): min and max |
|---|
| 3217 | ordinates of the selected domain (in the plane coordinates)<br> |
|---|
| 3218 | |
|---|
| 3219 | |
|---|
| 3220 | |
|---|
| 3221 | |
|---|
| 3222 | - |
|---|
| 3223 | Range(Z) (or max(RangeZ)): half width of the layer of action of the |
|---|
| 3224 | plane (in 3D) |
|---|
| 3225 | |
|---|
| 3226 | |
|---|
| 3227 | |
|---|
| 3228 | </ul> |
|---|
| 3229 | |
|---|
| 3230 | |
|---|
| 3231 | |
|---|
| 3232 | |
|---|
| 3233 | </li> |
|---|
| 3234 | |
|---|
| 3235 | |
|---|
| 3236 | |
|---|
| 3237 | |
|---|
| 3238 | <li> <span style="font-weight: bold;">DX, DY, |
|---|
| 3239 | DZ:</span> <br> |
|---|
| 3240 | |
|---|
| 3241 | |
|---|
| 3242 | |
|---|
| 3243 | |
|---|
| 3244 | |
|---|
| 3245 | |
|---|
| 3246 | |
|---|
| 3247 | <ul style="font-weight: bold;"> |
|---|
| 3248 | |
|---|
| 3249 | |
|---|
| 3250 | |
|---|
| 3251 | |
|---|
| 3252 | <li> <span style="font-weight: normal;">grid |
|---|
| 3253 | mesh along the |
|---|
| 3254 | x, y, z directions respectively. Needed for the projection modes |
|---|
| 3255 | 'interp' and 'filter', or to define smoothed variables in the mode |
|---|
| 3256 | 'projection'.</span></li> |
|---|
| 3257 | |
|---|
| 3258 | |
|---|
| 3259 | |
|---|
| 3260 | |
|---|
| 3261 | |
|---|
| 3262 | |
|---|
| 3263 | |
|---|
| 3264 | </ul> |
|---|
| 3265 | |
|---|
| 3266 | |
|---|
| 3267 | |
|---|
| 3268 | |
|---|
| 3269 | </li> |
|---|
| 3270 | |
|---|
| 3271 | |
|---|
| 3272 | |
|---|
| 3273 | |
|---|
| 3274 | <li>Angles<span style="font-weight: bold;"> |
|---|
| 3275 | Phi, |
|---|
| 3276 | Theta, Psi</span><strong>:</strong></li> |
|---|
| 3277 | |
|---|
| 3278 | |
|---|
| 3279 | |
|---|
| 3280 | |
|---|
| 3281 | |
|---|
| 3282 | |
|---|
| 3283 | |
|---|
| 3284 | <ul> |
|---|
| 3285 | |
|---|
| 3286 | |
|---|
| 3287 | |
|---|
| 3288 | |
|---|
| 3289 | <li>For 'plane' and 'volume':</li> |
|---|
| 3290 | |
|---|
| 3291 | |
|---|
| 3292 | |
|---|
| 3293 | |
|---|
| 3294 | it corresponds |
|---|
| 3295 | to |
|---|
| 3296 | the Euler angles defining the coordinate |
|---|
| 3297 | system attached to the object. The first rotation is by an angle <img style="border: 0px solid ; width: 8px; height: 15px;" src="Inline8.gif" class="inlineformula" alt="phi"> |
|---|
| 3298 | about the <a href="http://mathworld.wolfram.com/z-Axis.html" class="Hyperlink"><i>z</i>-axis</a>, the |
|---|
| 3299 | second is by an angle <img style="border: 0px solid ; width: 55px; height: 15px;" src="Inline9.gif" class="inlineformula" alt="theta in [0,pi]"> about the <a href="http://mathworld.wolfram.com/x-Axis.html" class="Hyperlink"><i>x</i>-axis</a>, and |
|---|
| 3300 | the third is by an angle <img style="border: 0px solid ; width: 9px; height: 15px;" src="Inline10.gif" class="inlineformula" alt="psi"> |
|---|
| 3301 | about the <a href="http://mathworld.wolfram.com/z-Axis.html" class="Hyperlink"><i>z</i>-axis</a> |
|---|
| 3302 | (again). |
|---|
| 3303 | |
|---|
| 3304 | |
|---|
| 3305 | |
|---|
| 3306 | </ul> |
|---|
| 3307 | |
|---|
| 3308 | |
|---|
| 3309 | |
|---|
| 3310 | |
|---|
| 3311 | </ul> |
|---|
| 3312 | |
|---|
| 3313 | |
|---|
| 3314 | |
|---|
| 3315 | |
|---|
| 3316 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId777014"></a><img style="width: 498px; height: 143px;" alt="definition of Euler's angle" src="EulerAngles_600.gif"></div> |
|---|
| 3317 | |
|---|
| 3318 | |
|---|
| 3319 | |
|---|
| 3320 | |
|---|
| 3321 | <ul style="text-align: justify;"> |
|---|
| 3322 | |
|---|
| 3323 | |
|---|
| 3324 | |
|---|
| 3325 | |
|---|
| 3326 | <li>For 'points', 'polyline', 'polygon': not |
|---|
| 3327 | used </li> |
|---|
| 3328 | |
|---|
| 3329 | |
|---|
| 3330 | |
|---|
| 3331 | |
|---|
| 3332 | <li>For 'rectangle', 'ellipse': defines the |
|---|
| 3333 | plane |
|---|
| 3334 | of the figure and its orientation (along the x and y orientatons |
|---|
| 3335 | defined by the new plane axis)</li> |
|---|
| 3336 | |
|---|
| 3337 | |
|---|
| 3338 | |
|---|
| 3339 | |
|---|
| 3340 | <li>for 'line': in 2D, Phi can represent a non-normal |
|---|
| 3341 | angle |
|---|
| 3342 | of projection (=0 by default for a normal projection). In 3D, Psi can |
|---|
| 3343 | be used to define a new axis with origin at the first point of the line |
|---|
| 3344 | and z axis aligned with the line (then Phi and Theta are |
|---|
| 3345 | already implicitely imposed by the line direction). </li> |
|---|
| 3346 | |
|---|
| 3347 | |
|---|
| 3348 | |
|---|
| 3349 | |
|---|
| 3350 | </ul> |
|---|
| 3351 | |
|---|
| 3352 | |
|---|
| 3353 | |
|---|
| 3354 | |
|---|
| 3355 | <p style="margin-bottom: 0cm; text-align: justify;"> </p> |
|---|
| 3356 | |
|---|
| 3357 | |
|---|
| 3358 | |
|---|
| 3359 | |
|---|
| 3360 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId680179"></a>5-3 |
|---|
| 3361 | Object plotting:</h2> |
|---|
| 3362 | |
|---|
| 3363 | |
|---|
| 3364 | |
|---|
| 3365 | |
|---|
| 3366 | Projections objects are drawn in magenta color when they are selected |
|---|
| 3367 | for creation or edition, and in blue otherwise. |
|---|
| 3368 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId180938"></a> |
|---|
| 3369 | <ul> |
|---|
| 3370 | |
|---|
| 3371 | |
|---|
| 3372 | |
|---|
| 3373 | |
|---|
| 3374 | <li>'points' are represented by dots surrounded by a dashed |
|---|
| 3375 | circle showing the range of projection.</li> |
|---|
| 3376 | |
|---|
| 3377 | |
|---|
| 3378 | |
|---|
| 3379 | |
|---|
| 3380 | <li>'line' , 'polyline' are plotted as lines, surrounded by two |
|---|
| 3381 | dashed lines showing the range of projection, when applicable (i.e. not |
|---|
| 3382 | in the case ProjMode='interp').</li> |
|---|
| 3383 | |
|---|
| 3384 | |
|---|
| 3385 | |
|---|
| 3386 | |
|---|
| 3387 | <li>'polygon', 'rectangle', 'ellipse' are drawn. In the |
|---|
| 3388 | case ProjMode ='inside' or 'outside' the corresponding area is |
|---|
| 3389 | painted in magenta (or blue when they are not selected).</li> |
|---|
| 3390 | |
|---|
| 3391 | |
|---|
| 3392 | |
|---|
| 3393 | |
|---|
| 3394 | <li>'plane' are shown by their axis. These axis are limited to |
|---|
| 3395 | their range of selection (RangeX and RangeY) when applicable. |
|---|
| 3396 | Otherwise they end at the edge of the figure with an arrow. **</li> |
|---|
| 3397 | |
|---|
| 3398 | |
|---|
| 3399 | |
|---|
| 3400 | |
|---|
| 3401 | <li>'volume' are shown like 'plane', except that they are |
|---|
| 3402 | painted in magenta (or blue) **<span style="font-weight: bold;"></span></li> |
|---|
| 3403 | |
|---|
| 3404 | |
|---|
| 3405 | |
|---|
| 3406 | |
|---|
| 3407 | </ul> |
|---|
| 3408 | |
|---|
| 3409 | |
|---|
| 3410 | |
|---|
| 3411 | |
|---|
| 3412 | </div> |
|---|
| 3413 | |
|---|
| 3414 | |
|---|
| 3415 | |
|---|
| 3416 | |
|---|
| 3417 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId529788"></a>6 |
|---|
| 3418 | <a name="geometry_calib"></a>Geometric |
|---|
| 3419 | calibration:</h1> |
|---|
| 3420 | |
|---|
| 3421 | |
|---|
| 3422 | |
|---|
| 3423 | |
|---|
| 3424 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 3425 | |
|---|
| 3426 | |
|---|
| 3427 | |
|---|
| 3428 | |
|---|
| 3429 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId348355"></a><a name="geometric_calib_gene"></a>6-1 Generalities:</h2> |
|---|
| 3430 | |
|---|
| 3431 | |
|---|
| 3432 | |
|---|
| 3433 | |
|---|
| 3434 | <p style="text-align: justify;"> |
|---|
| 3435 | Transforming image to |
|---|
| 3436 | physical |
|---|
| 3437 | coordinates is an important problem |
|---|
| 3438 | for measuring techniques based on imaging. The image coordinates |
|---|
| 3439 | represent the two cartesian axis x,y of the image, with origin at the |
|---|
| 3440 | lower left corner. Note that the y direction is directed upward, while |
|---|
| 3441 | the corresponding image index j is oriented downward. The |
|---|
| 3442 | physical coordinates are defined from the experimental set-up. The |
|---|
| 3443 | correspondance is obtained by imaging reference object(s) |
|---|
| 3444 | whose |
|---|
| 3445 | positions are known with respect to the physical coordinate system. We |
|---|
| 3446 | handle three kinds of transforms:</p> |
|---|
| 3447 | |
|---|
| 3448 | |
|---|
| 3449 | |
|---|
| 3450 | |
|---|
| 3451 | <ul style="text-align: justify;"> |
|---|
| 3452 | |
|---|
| 3453 | |
|---|
| 3454 | |
|---|
| 3455 | |
|---|
| 3456 | <li><span style="font-weight: bold;"><span style="font-style: italic;">Scaling</span>:</span> |
|---|
| 3457 | linear rescaling along x and y + translation</li> |
|---|
| 3458 | |
|---|
| 3459 | |
|---|
| 3460 | |
|---|
| 3461 | |
|---|
| 3462 | </ul> |
|---|
| 3463 | |
|---|
| 3464 | |
|---|
| 3465 | |
|---|
| 3466 | |
|---|
| 3467 | <ul style="text-align: justify;"> |
|---|
| 3468 | |
|---|
| 3469 | |
|---|
| 3470 | |
|---|
| 3471 | |
|---|
| 3472 | <li><span style="font-style: italic; font-weight: bold;">Linear:</span> |
|---|
| 3473 | general linear transform, including translation and rotation (but no |
|---|
| 3474 | perspective effects)</li> |
|---|
| 3475 | |
|---|
| 3476 | |
|---|
| 3477 | |
|---|
| 3478 | |
|---|
| 3479 | </ul> |
|---|
| 3480 | |
|---|
| 3481 | |
|---|
| 3482 | |
|---|
| 3483 | |
|---|
| 3484 | <ul style="text-align: justify;"> |
|---|
| 3485 | |
|---|
| 3486 | |
|---|
| 3487 | |
|---|
| 3488 | |
|---|
| 3489 | <li><span style="font-weight: bold; font-style: italic;">Tsai:</span> |
|---|
| 3490 | this transforms handles projection effects, as needed for stereoscopic |
|---|
| 3491 | view, as well as quadratic distortion, according to the pinhole camera |
|---|
| 3492 | model ( R.Y. Tsai,<em> An Efficient and Accurate Camera |
|---|
| 3493 | Calibration Technique for 3D Machine Vision.</em> Proceedings of |
|---|
| 3494 | IEEE Conference on Computer Vision and Pattern Recognition, Miami |
|---|
| 3495 | Beach, FL, pp. 364-374, 1986). </li> |
|---|
| 3496 | |
|---|
| 3497 | |
|---|
| 3498 | |
|---|
| 3499 | |
|---|
| 3500 | </ul> |
|---|
| 3501 | |
|---|
| 3502 | |
|---|
| 3503 | |
|---|
| 3504 | |
|---|
| 3505 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId949329"></a> |
|---|
| 3506 | <span style="font-weight: normal;"> |
|---|
| 3507 | The transform coefficients for each |
|---|
| 3508 | image series are stored in the corresponding xml documentation file, in |
|---|
| 3509 | the section |
|---|
| 3510 | ImaDoc/GeometryCalib. These coefficients are read by the function <span style="text-decoration: underline;">UVMAT/read_imadoc.m</span>. |
|---|
| 3511 | The function <a href="FUNCTIONS_DOC/phys.html"><span style="text-decoration: underline;">phys.m</span></a> |
|---|
| 3512 | applies the transform of any input field from image to physical |
|---|
| 3513 | coordinates, while <a href="FUNCTIONS_DOC/px.html"><span style="text-decoration: underline;">px.m</span></a> |
|---|
| 3514 | applies the reverse transform. The coefficients for the Tsai |
|---|
| 3515 | transform can be determined using the image acquisition software <span style="text-decoration: underline;">Acquix</span>. |
|---|
| 3516 | Calibration coefficients can be also obtained with the |
|---|
| 3517 | interface <span style="text-decoration: underline;">geometry_calib.fig</span>. |
|---|
| 3518 | </span><br> |
|---|
| 3519 | |
|---|
| 3520 | |
|---|
| 3521 | |
|---|
| 3522 | |
|---|
| 3523 | <span style="font-weight: normal;"> |
|---|
| 3524 | </span><br> |
|---|
| 3525 | |
|---|
| 3526 | |
|---|
| 3527 | |
|---|
| 3528 | |
|---|
| 3529 | <span style="font-weight: normal;"> |
|---|
| 3530 | </span></div> |
|---|
| 3531 | |
|---|
| 3532 | |
|---|
| 3533 | |
|---|
| 3534 | |
|---|
| 3535 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId348355"></a>6-2 |
|---|
| 3536 | The GUI <span style="text-decoration: underline;">geometry_calib.fig</span>:</h2> |
|---|
| 3537 | |
|---|
| 3538 | |
|---|
| 3539 | |
|---|
| 3540 | |
|---|
| 3541 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId478717"></a> |
|---|
| 3542 | This GUI appears by pressing by activating the menu bar<span style="font-weight: bold;"> Tools/Geometric calibration </span>in |
|---|
| 3543 | the GUI <span style="text-decoration: underline;">uvmat</span> .<br> |
|---|
| 3544 | |
|---|
| 3545 | |
|---|
| 3546 | |
|---|
| 3547 | |
|---|
| 3548 | </div> |
|---|
| 3549 | |
|---|
| 3550 | |
|---|
| 3551 | |
|---|
| 3552 | |
|---|
| 3553 | <ul style="text-align: justify;"> |
|---|
| 3554 | |
|---|
| 3555 | |
|---|
| 3556 | |
|---|
| 3557 | |
|---|
| 3558 | <li><span style="font-weight: bold; font-style: italic;">Appending |
|---|
| 3559 | and editing calibration points:</span><span style="font-weight: bold;"></span></li> |
|---|
| 3560 | |
|---|
| 3561 | |
|---|
| 3562 | |
|---|
| 3563 | |
|---|
| 3564 | </ul> |
|---|
| 3565 | |
|---|
| 3566 | |
|---|
| 3567 | |
|---|
| 3568 | |
|---|
| 3569 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId982303"></a> |
|---|
| 3570 | To introduce new reference points, |
|---|
| 3571 | select 'append' in the <span style="font-weight: bold;">edit_append</span> |
|---|
| 3572 | menu, and mark the points with the mouse on uvmat (with the option 'px' |
|---|
| 3573 | in <span style="font-weight: bold;">menu_coord</span>). |
|---|
| 3574 | The new image coordinates then appear in the list <span style="font-weight: bold;">ListCoord</span><span style="font-weight: bold;">. </span>Reference points |
|---|
| 3575 | can be also added manually using the edit boxes<span style="font-weight: bold;"> </span>with the option |
|---|
| 3576 | 'append'. For proper calibration, the point coordinates should be ordered in a monotonic way (like on a grid). <br> |
|---|
| 3577 | |
|---|
| 3578 | If calibration data already |
|---|
| 3579 | exist in the ImaDoc file when <span style="text-decoration: underline;">geometry_calib</span> |
|---|
| 3580 | is opened, the corresponding list of reference points are |
|---|
| 3581 | displayed in the central window <span style="font-weight: bold;">ListCoord</span> |
|---|
| 3582 | of <span style="text-decoration: underline;">geometry_calib</span>. |
|---|
| 3583 | The three first columns indicate the physical coordinates and the two |
|---|
| 3584 | last ones the corresponding image coordinates.<br> |
|---|
| 3585 | |
|---|
| 3586 | |
|---|
| 3587 | |
|---|
| 3588 | |
|---|
| 3589 | Alternatively, a file with point |
|---|
| 3590 | coordinates (created by <span style="text-decoration: underline;">set_object</span>) |
|---|
| 3591 | can be imported with the <span style="font-weight: bold;">import</span> |
|---|
| 3592 | browser at |
|---|
| 3593 | the top of the GUI <span style="text-decoration: underline;">geometry_calib</span>. |
|---|
| 3594 | In the 'edit' mode the new point coordinates will be listed below the |
|---|
| 3595 | current line in <span style="font-weight: bold;">ListCoord</span>, replacing the previous data. In the |
|---|
| 3596 | 'append' mode, it will be added at the bottom of the current list. If |
|---|
| 3597 | the input file contain pixel coordinates (CoordType='px')..... created |
|---|
| 3598 | by <span style="text-decoration: underline;">set_object</span>, |
|---|
| 3599 | in pixel coordinates, only the pixel coordinates are displayed. The |
|---|
| 3600 | corresponding physical coordinates can be introduced by |
|---|
| 3601 | manually editing each line in the list <span style="font-weight: bold;">ListCoord.</span><br> |
|---|
| 3602 | |
|---|
| 3603 | |
|---|
| 3604 | |
|---|
| 3605 | |
|---|
| 3606 | <span style="font-weight: bold;"> |
|---|
| 3607 | </span> For editing a referece |
|---|
| 3608 | point, select it in the list <span style="font-weight: bold;">ListCoord</span>, |
|---|
| 3609 | and use the edit boxes <span style="font-weight: bold;">XObject</span>, |
|---|
| 3610 | <span style="font-weight: bold;">YObject, </span><span style="font-weight: bold;">ZObject </span>(for 3D |
|---|
| 3611 | calibration), <span style="font-weight: bold;">XImage</span>, |
|---|
| 3612 | <span style="font-weight: bold;">YImage</span>. |
|---|
| 3613 | Type |
|---|
| 3614 | return carriage to validate the edition. The reference point can be |
|---|
| 3615 | suppressed by typing the 'backward' arrow on the key-boeard, or by |
|---|
| 3616 | filling the five boxes with blank values.<br> |
|---|
| 3617 | |
|---|
| 3618 | |
|---|
| 3619 | |
|---|
| 3620 | |
|---|
| 3621 | <br> |
|---|
| 3622 | |
|---|
| 3623 | |
|---|
| 3624 | |
|---|
| 3625 | |
|---|
| 3626 | </div> |
|---|
| 3627 | |
|---|
| 3628 | |
|---|
| 3629 | |
|---|
| 3630 | |
|---|
| 3631 | <ul style="text-align: justify;"> |
|---|
| 3632 | |
|---|
| 3633 | |
|---|
| 3634 | |
|---|
| 3635 | |
|---|
| 3636 | <li style="font-weight: bold; font-style: italic;">Plotting |
|---|
| 3637 | calibration points: <br> |
|---|
| 3638 | |
|---|
| 3639 | |
|---|
| 3640 | |
|---|
| 3641 | |
|---|
| 3642 | </li> |
|---|
| 3643 | |
|---|
| 3644 | |
|---|
| 3645 | |
|---|
| 3646 | |
|---|
| 3647 | </ul> |
|---|
| 3648 | |
|---|
| 3649 | |
|---|
| 3650 | |
|---|
| 3651 | |
|---|
| 3652 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId595821"></a> |
|---|
| 3653 | Press the button <span style="font-weight: bold;">plot</span> |
|---|
| 3654 | to visualise the list of reference points. The physical or image |
|---|
| 3655 | coordinates will be used in the list ListCoord, depending on the option |
|---|
| 3656 | 'phys' or 'px' in the menu <span style="font-weight: bold;">menu_coord</span> |
|---|
| 3657 | of the GUI uvmat . |
|---|
| 3658 | </div> |
|---|
| 3659 | |
|---|
| 3660 | |
|---|
| 3661 | |
|---|
| 3662 | |
|---|
| 3663 | <ul style="text-align: justify;"> |
|---|
| 3664 | |
|---|
| 3665 | |
|---|
| 3666 | |
|---|
| 3667 | |
|---|
| 3668 | <li style="font-weight: bold; font-style: italic;">Translation |
|---|
| 3669 | and rotation of calibration points:</li> |
|---|
| 3670 | |
|---|
| 3671 | |
|---|
| 3672 | |
|---|
| 3673 | |
|---|
| 3674 | </ul> |
|---|
| 3675 | |
|---|
| 3676 | |
|---|
| 3677 | |
|---|
| 3678 | |
|---|
| 3679 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId700227"></a> |
|---|
| 3680 | A translation or rotation (in physical |
|---|
| 3681 | space) can be |
|---|
| 3682 | introduced by the edit boxes on the top of geometry_calib. Press the |
|---|
| 3683 | '+' or '-' button to control the sign of the translation or |
|---|
| 3684 | rotation. In the case of rotation, the origin of the rotation, as well |
|---|
| 3685 | as the angle (in degree) must be introduced. The resulting coordinates |
|---|
| 3686 | appear in the list <span style="font-weight: bold;">ListCoord</span>. |
|---|
| 3687 | </div> |
|---|
| 3688 | |
|---|
| 3689 | |
|---|
| 3690 | |
|---|
| 3691 | |
|---|
| 3692 | <ul style="text-align: justify;"> |
|---|
| 3693 | |
|---|
| 3694 | |
|---|
| 3695 | |
|---|
| 3696 | |
|---|
| 3697 | <li><span style="font-weight: bold; font-style: italic;">Recording |
|---|
| 3698 | calibration parameters:</span></li> |
|---|
| 3699 | |
|---|
| 3700 | |
|---|
| 3701 | |
|---|
| 3702 | |
|---|
| 3703 | </ul> |
|---|
| 3704 | |
|---|
| 3705 | |
|---|
| 3706 | |
|---|
| 3707 | |
|---|
| 3708 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId202336"></a> |
|---|
| 3709 | Once the list of calibration points has |
|---|
| 3710 | been completed, press a calibration button at the top of <span style="text-decoration: underline;">geometry_calib</span>, |
|---|
| 3711 | with the following options (see previous sub-section).<br> |
|---|
| 3712 | |
|---|
| 3713 | |
|---|
| 3714 | |
|---|
| 3715 | |
|---|
| 3716 | <span style="font-weight: bold;">calib_rescale: </span>yields |
|---|
| 3717 | coefficients for simple rescaling and translation without |
|---|
| 3718 | rotation, <br> |
|---|
| 3719 | |
|---|
| 3720 | |
|---|
| 3721 | |
|---|
| 3722 | |
|---|
| 3723 | <span style="font-weight: bold;"> calib_lin:</span> |
|---|
| 3724 | yields coefficients for a linear transform<br> |
|---|
| 3725 | |
|---|
| 3726 | |
|---|
| 3727 | |
|---|
| 3728 | |
|---|
| 3729 | <span style="font-weight: bold;"> calib_tsai:</span> |
|---|
| 3730 | yields |
|---|
| 3731 | coefficients for the Tsai model, including perspective effects and |
|---|
| 3732 | quadradic deformation. This option requires a sufficient number of |
|---|
| 3733 | calibration points (typically > 10) sufficiently spread over the |
|---|
| 3734 | image. <br> |
|---|
| 3735 | |
|---|
| 3736 | |
|---|
| 3737 | |
|---|
| 3738 | |
|---|
| 3739 | <br> |
|---|
| 3740 | |
|---|
| 3741 | |
|---|
| 3742 | |
|---|
| 3743 | |
|---|
| 3744 | The coefficients are recorded |
|---|
| 3745 | in the xml file associated with the image currently opened by <span style="text-decoration: underline;">uvmat</span>. |
|---|
| 3746 | If previous calibration data already exist, the previous xml file is |
|---|
| 3747 | updated, but the original one is preserved with the extension |
|---|
| 3748 | .xml~. If no xml file already exists, it is created. The |
|---|
| 3749 | image |
|---|
| 3750 | transformation to phys coordiantes can be directly seen on the uvmat |
|---|
| 3751 | interface after completion of the calib... commands.<br> |
|---|
| 3752 | |
|---|
| 3753 | |
|---|
| 3754 | |
|---|
| 3755 | |
|---|
| 3756 | <span style="font-weight: normal;"></span> |
|---|
| 3757 | To |
|---|
| 3758 | reproduce the same calibrationn for image series, open one of the image |
|---|
| 3759 | in the series, and do again the calibration with the same points, or |
|---|
| 3760 | copy-paste the section GeometryCalib of the xml documentation file with |
|---|
| 3761 | a text editor.<br> |
|---|
| 3762 | |
|---|
| 3763 | |
|---|
| 3764 | |
|---|
| 3765 | |
|---|
| 3766 | <br> |
|---|
| 3767 | |
|---|
| 3768 | |
|---|
| 3769 | |
|---|
| 3770 | |
|---|
| 3771 | The coefficients are recorded in the xml |
|---|
| 3772 | file under the key <span style="font-weight: normal;">ImaDoc/GeometryCalib |
|---|
| 3773 | as follows:</span><br> |
|---|
| 3774 | |
|---|
| 3775 | |
|---|
| 3776 | |
|---|
| 3777 | |
|---|
| 3778 | <span style="font-weight: normal;"> |
|---|
| 3779 | <focal>: focal length, in mm (=1 for the |
|---|
| 3780 | options <span style="font-weight: bold;">calib_lin</span> |
|---|
| 3781 | and <span style="font-weight: bold;">calib_rescale</span>) |
|---|
| 3782 | </span><br> |
|---|
| 3783 | |
|---|
| 3784 | |
|---|
| 3785 | |
|---|
| 3786 | |
|---|
| 3787 | <span style="font-weight: normal;"> |
|---|
| 3788 | </span><span style="font-weight: normal;"><dpx_dpy>: |
|---|
| 3789 | dimensions of the individual sensor elements, in mm </span><span style="font-weight: normal;"> (=[1 1] for the |
|---|
| 3790 | options <span style="font-weight: bold;">calib_lin</span> |
|---|
| 3791 | and <span style="font-weight: bold;">calib_rescale</span>)</span><br> |
|---|
| 3792 | |
|---|
| 3793 | |
|---|
| 3794 | |
|---|
| 3795 | |
|---|
| 3796 | <span style="font-weight: normal;"><Cx_Cy>: |
|---|
| 3797 | position coordinates of the optical axis on the sensor (in px) </span><span style="font-weight: normal;">(=[0 0] for the options <span style="font-weight: bold;">calib_lin</span> and <span style="font-weight: bold;">calib_rescale</span>)</span><br> |
|---|
| 3798 | |
|---|
| 3799 | |
|---|
| 3800 | |
|---|
| 3801 | |
|---|
| 3802 | <span style="font-weight: normal;"><sx>: |
|---|
| 3803 | aspect ratio of sensor elements </span><span style="font-weight: normal;"></span><span style="font-weight: normal;">(=1 for the options <span style="font-weight: bold;">calib_lin</span> and <span style="font-weight: bold;">calib_rescale</span>)</span><br> |
|---|
| 3804 | |
|---|
| 3805 | |
|---|
| 3806 | |
|---|
| 3807 | |
|---|
| 3808 | <span style="font-weight: normal;"><kappa1>: |
|---|
| 3809 | coefficient of quadratic deformation </span><span style="font-weight: normal;"></span><span style="font-weight: normal;"></span><span style="font-weight: normal;">(=1 for the options <span style="font-weight: bold;">calib_lin</span> and <span style="font-weight: bold;">calib_rescale</span>)</span><br> |
|---|
| 3810 | |
|---|
| 3811 | |
|---|
| 3812 | |
|---|
| 3813 | |
|---|
| 3814 | <span style="font-weight: normal;"><Tx_Ty_Tz>: |
|---|
| 3815 | translation, </span><span style="font-weight: normal;"></span><span style="font-weight: normal;"></span><span style="font-weight: normal;"></span><span style="font-weight: normal;">(Tz=1 for the options <span style="font-weight: bold;">calib_lin</span> and <span style="font-weight: bold;">calib_rescale</span>)</span><br> |
|---|
| 3816 | |
|---|
| 3817 | |
|---|
| 3818 | |
|---|
| 3819 | |
|---|
| 3820 | <span style="font-weight: normal;"><R>: |
|---|
| 3821 | rotation matrix (in 3 lines)</span><br> |
|---|
| 3822 | |
|---|
| 3823 | |
|---|
| 3824 | |
|---|
| 3825 | |
|---|
| 3826 | <span style="font-weight: normal;"> |
|---|
| 3827 | For the option <span style="font-weight: bold;">calib_rescale</span></span><br> |
|---|
| 3828 | |
|---|
| 3829 | |
|---|
| 3830 | |
|---|
| 3831 | |
|---|
| 3832 | <span style="font-weight: normal;"> |
|---|
| 3833 | R |
|---|
| 3834 | (i=1)= [pxcmx 0 0]</span><br> |
|---|
| 3835 | |
|---|
| 3836 | |
|---|
| 3837 | |
|---|
| 3838 | |
|---|
| 3839 | <span style="font-weight: normal;"> |
|---|
| 3840 | </span><span style="font-weight: normal;">R (i=2)= [0 pxcmy 0]</span><br> |
|---|
| 3841 | |
|---|
| 3842 | |
|---|
| 3843 | |
|---|
| 3844 | |
|---|
| 3845 | <span style="font-weight: normal;"> |
|---|
| 3846 | </span><span style="font-weight: normal;">R (i=3)= [0 0 1]</span><br> |
|---|
| 3847 | |
|---|
| 3848 | |
|---|
| 3849 | |
|---|
| 3850 | |
|---|
| 3851 | <span style="font-weight: normal;"> |
|---|
| 3852 | where pxcmx and pxcmy are the scaling factors along x and y.</span><br> |
|---|
| 3853 | |
|---|
| 3854 | |
|---|
| 3855 | |
|---|
| 3856 | |
|---|
| 3857 | <span style="font-weight: normal;"> |
|---|
| 3858 | </span><span style="font-weight: normal;"><ErrorRms>: |
|---|
| 3859 | rms |
|---|
| 3860 | difference (in X and Y direction) between the image coordinates |
|---|
| 3861 | measured for the calibration points and the coordinates transformed |
|---|
| 3862 | from their physical coordinates (using the function <span style="text-decoration: underline;">UVMAT/px.m</span>) |
|---|
| 3863 | </span><br> |
|---|
| 3864 | |
|---|
| 3865 | |
|---|
| 3866 | |
|---|
| 3867 | |
|---|
| 3868 | <span style="font-weight: normal;"> |
|---|
| 3869 | </span><span style="font-weight: normal;"><ErrorMax> |
|---|
| 3870 | : </span><span style="font-weight: normal;">maximum |
|---|
| 3871 | difference (in X and Y |
|---|
| 3872 | direction) between the image coordinates measured for the calibration |
|---|
| 3873 | points and the coordinates transformed from their physical coordinates. |
|---|
| 3874 | (using the function <span style="text-decoration: underline;">UVMAT/px.m</span>) |
|---|
| 3875 | </span><br> |
|---|
| 3876 | |
|---|
| 3877 | |
|---|
| 3878 | |
|---|
| 3879 | |
|---|
| 3880 | <span style="font-weight: normal;"><SourceCalib> |
|---|
| 3881 | set of the point coordinates used for calibration</span><br> |
|---|
| 3882 | |
|---|
| 3883 | |
|---|
| 3884 | |
|---|
| 3885 | |
|---|
| 3886 | <span style="font-weight: normal;"> |
|---|
| 3887 | </span><span style="font-weight: normal;"><PointCoord> |
|---|
| 3888 | [x y z X Y] , where x,y,z are the physical coordinates of each point, X |
|---|
| 3889 | Y its image coordinates.</span><br> |
|---|
| 3890 | |
|---|
| 3891 | |
|---|
| 3892 | |
|---|
| 3893 | |
|---|
| 3894 | <span style="font-weight: normal;"> |
|---|
| 3895 | </span><span style="font-weight: normal;"></span><br> |
|---|
| 3896 | |
|---|
| 3897 | |
|---|
| 3898 | |
|---|
| 3899 | |
|---|
| 3900 | </div> |
|---|
| 3901 | |
|---|
| 3902 | |
|---|
| 3903 | |
|---|
| 3904 | |
|---|
| 3905 | <ul style="text-align: justify;"> |
|---|
| 3906 | |
|---|
| 3907 | |
|---|
| 3908 | |
|---|
| 3909 | |
|---|
| 3910 | </ul> |
|---|
| 3911 | |
|---|
| 3912 | |
|---|
| 3913 | |
|---|
| 3914 | |
|---|
| 3915 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId240292"></a> |
|---|
| 3916 | </div> |
|---|
| 3917 | |
|---|
| 3918 | |
|---|
| 3919 | |
|---|
| 3920 | |
|---|
| 3921 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId574740"></a>7 |
|---|
| 3922 | Masks and grids:</h1> |
|---|
| 3923 | |
|---|
| 3924 | |
|---|
| 3925 | |
|---|
| 3926 | |
|---|
| 3927 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 3928 | |
|---|
| 3929 | |
|---|
| 3930 | |
|---|
| 3931 | |
|---|
| 3932 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId348355"></a><a name="makemask"></a>7-1 |
|---|
| 3933 | Masks:</h2> |
|---|
| 3934 | |
|---|
| 3935 | |
|---|
| 3936 | |
|---|
| 3937 | |
|---|
| 3938 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId132948"></a> |
|---|
| 3939 | Mask files are used to restrict the |
|---|
| 3940 | domain of CIV processing, to |
|---|
| 3941 | take into account fluid boundaries or invalid image zones. They must |
|---|
| 3942 | be stored as .png images with 8 bits, with names [filebase '_xxmask_' |
|---|
| 3943 | 'filenumber' '.png'], where xx is the number of masks (nbslices) used |
|---|
| 3944 | when the series of fields corresponds physically to a set of nbslices |
|---|
| 3945 | positions. The mask filenumber used is the image field number modulo |
|---|
| 3946 | nbslices. Use xx=1 in the default case of a fixed position and a |
|---|
| 3947 | single mask. Masks can be made by pressing the menu bar <span style="font-weight: bold;">Tools/make mask</span> |
|---|
| 3948 | on the GUI <strong>uvmat</strong>. The |
|---|
| 3949 | mask is created interactively with the mouse on the current |
|---|
| 3950 | image. |
|---|
| 3951 | </div> |
|---|
| 3952 | |
|---|
| 3953 | |
|---|
| 3954 | |
|---|
| 3955 | |
|---|
| 3956 | <p style="text-align: justify;">First open an input image |
|---|
| 3957 | file name with the browser, or |
|---|
| 3958 | the |
|---|
| 3959 | edit box |
|---|
| 3960 | and carriadge return<b>.</b> From the image name, a |
|---|
| 3961 | corresponding |
|---|
| 3962 | mask name is proposed in the lower edit box. It should be edited if a |
|---|
| 3963 | series of masks is made, in case of mutipositions (number nbslices) |
|---|
| 3964 | of the laser sheet in a series. The names must be [filebase '_xxmask' |
|---|
| 3965 | 'filenumber' '.png'], where xx is the number of masks (nbslices). The |
|---|
| 3966 | mask filenumber used is the image field number modulo nbslices. The |
|---|
| 3967 | filenumber can be incremented by the NEXT press button.</p> |
|---|
| 3968 | |
|---|
| 3969 | |
|---|
| 3970 | |
|---|
| 3971 | |
|---|
| 3972 | <p style="text-align: justify;">Holes can be made by the |
|---|
| 3973 | press button <strong>mask_hole</strong> |
|---|
| 3974 | which allows to draw a polygon on the image (the matlab image |
|---|
| 3975 | processing toolbox is needed). The inside of this polygone is masked.</p> |
|---|
| 3976 | |
|---|
| 3977 | |
|---|
| 3978 | |
|---|
| 3979 | |
|---|
| 3980 | <p style="text-align: justify;">Press the red push |
|---|
| 3981 | button <b>save_mask</b> |
|---|
| 3982 | which appeared on the lower right. |
|---|
| 3983 | The saved mask is then |
|---|
| 3984 | displayed. A new image can be then entered.</p> |
|---|
| 3985 | |
|---|
| 3986 | |
|---|
| 3987 | |
|---|
| 3988 | |
|---|
| 3989 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId502619"></a><a name="set_grid"></a>7-2 |
|---|
| 3990 | Grids:</h2> |
|---|
| 3991 | |
|---|
| 3992 | |
|---|
| 3993 | |
|---|
| 3994 | |
|---|
| 3995 | <p style="text-align: justify;">To create a grid for PIV, activate the menu bar <span style="font-weight: bold;">Tools/Make grid </span>on the GUI uvmat. Introduce a minimum value, mesh, and maximum value for |
|---|
| 3996 | each coordinate x in the edit boxes <span style="font-weight: bold;">XMin</span>, |
|---|
| 3997 | <span style="font-weight: bold;">DX</span>, <span style="font-weight: bold;">XMax</span> respectively. |
|---|
| 3998 | Do the same for the y coordinate. This must be expressed in |
|---|
| 3999 | physical coordinates. </p> |
|---|
| 4000 | |
|---|
| 4001 | |
|---|
| 4002 | |
|---|
| 4003 | |
|---|
| 4004 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId742651"></a> |
|---|
| 4005 | The grid will be limited to an image , or to the |
|---|
| 4006 | common |
|---|
| 4007 | region of two images, depending whether one or two image names are |
|---|
| 4008 | indicated in the edit boxes <span style="font-weight: bold;">image_1</span> |
|---|
| 4009 | and <span style="font-weight: bold;">image_2</span>. |
|---|
| 4010 | Press <span style="font-weight: bold;">save</span> |
|---|
| 4011 | to save the corresponding grid file (s). A dialog box appears to edit |
|---|
| 4012 | the name of the output grid file, and a second one in case of two |
|---|
| 4013 | images. <br> |
|---|
| 4014 | |
|---|
| 4015 | |
|---|
| 4016 | |
|---|
| 4017 | |
|---|
| 4018 | </div> |
|---|
| 4019 | |
|---|
| 4020 | |
|---|
| 4021 | |
|---|
| 4022 | |
|---|
| 4023 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId479237"></a><a name="series"></a>8 |
|---|
| 4024 | Operations on field series:</h1> |
|---|
| 4025 | |
|---|
| 4026 | |
|---|
| 4027 | |
|---|
| 4028 | |
|---|
| 4029 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 4030 | |
|---|
| 4031 | |
|---|
| 4032 | |
|---|
| 4033 | |
|---|
| 4034 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId953279"></a> |
|---|
| 4035 | </div> |
|---|
| 4036 | |
|---|
| 4037 | |
|---|
| 4038 | |
|---|
| 4039 | |
|---|
| 4040 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId856905"></a>8-1 |
|---|
| 4041 | The GUI <span style="text-decoration: underline;">series.fig</span>:</h2> |
|---|
| 4042 | |
|---|
| 4043 | |
|---|
| 4044 | |
|---|
| 4045 | |
|---|
| 4046 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId185"></a> |
|---|
| 4047 | Operations on field series are controled |
|---|
| 4048 | by the GUI <span style="text-decoration: underline;">series.fig</span>, |
|---|
| 4049 | which allows to set the root name and file indices on which a |
|---|
| 4050 | processing function must operate. The root path, |
|---|
| 4051 | subdirectory, |
|---|
| 4052 | root file name and extension are introduced in the same way as with the |
|---|
| 4053 | uvmat interface, on the edit windows <span style="font-weight: bold;">RootPath</span>,<span style="font-weight: bold;"> SubDir</span>, <span style="font-weight: bold;">RootFile</span> and <span style="font-weight: bold;">FileExt</span> |
|---|
| 4054 | respectively. The nomenclature for file indexing is represented in <span style="font-weight: bold;">NomType</span> ('<span style="font-weight: bold;">Indices</span>'). <br> |
|---|
| 4055 | |
|---|
| 4056 | |
|---|
| 4057 | |
|---|
| 4058 | |
|---|
| 4059 | Several input file series can be |
|---|
| 4060 | introduced simultaneously. For that purpose activate the check |
|---|
| 4061 | box <span style="font-weight: bold;">add</span> |
|---|
| 4062 | and browse for a new field: the new field will appear on a new line. <br> |
|---|
| 4063 | |
|---|
| 4064 | |
|---|
| 4065 | |
|---|
| 4066 | |
|---|
| 4067 | The velocity type and field is |
|---|
| 4068 | automatioally chosen by default, but it can be specified by <span style="font-weight: bold;">VelType</span> and <span style="font-weight: bold;">Field</span>. For that |
|---|
| 4069 | purpose use the menus <span style="font-weight: bold;">VelTypeMenu</span> |
|---|
| 4070 | and <span style="font-weight: bold;">fieldsinput</span>. |
|---|
| 4071 | In case of multiple input file series, these menus act only on the |
|---|
| 4072 | first line. <br> |
|---|
| 4073 | |
|---|
| 4074 | |
|---|
| 4075 | |
|---|
| 4076 | |
|---|
| 4077 | The set of file indices is set |
|---|
| 4078 | in the frame <span style="font-weight: bold;">RANGE</span>, |
|---|
| 4079 | while the processing function is chosen in the menu <span style="font-weight: bold;">ACTION</span>. All actions |
|---|
| 4080 | operate on the same series of input files, whose list can be obtained |
|---|
| 4081 | with the option <span style="font-weight: bold;">check_files</span>. |
|---|
| 4082 | The option <b>aver_stat </b>calculates<b> </b> |
|---|
| 4083 | a global average on the successive fields, while<b> </b><span style="font-weight: bold;">time_series</span><b> |
|---|
| 4084 | </b>provides a time series. The option <span style="font-weight: bold;">merge_proj</span> |
|---|
| 4085 | is used to project a whole series on a given grid, or to create a file |
|---|
| 4086 | series obtained by concatenation of different fields different fields. |
|---|
| 4087 | Finally any additional function can be called and included in |
|---|
| 4088 | the |
|---|
| 4089 | menu by selecting the option <span style="font-weight: bold;">usr_defined...</span> |
|---|
| 4090 | .<br> |
|---|
| 4091 | |
|---|
| 4092 | |
|---|
| 4093 | |
|---|
| 4094 | |
|---|
| 4095 | Any action is performed from field index |
|---|
| 4096 | <span style="font-weight: bold;">first_i</span> |
|---|
| 4097 | to <span style="font-weight: bold;">last_i</span> |
|---|
| 4098 | with |
|---|
| 4099 | increment <span style="font-weight: bold;">incr_i</span>. |
|---|
| 4100 | In case of double indexing, action is similarly performed from field |
|---|
| 4101 | index <span style="font-weight: bold;">first_j</span> |
|---|
| 4102 | to <span style="font-weight: bold;">last_j</span> |
|---|
| 4103 | with increment <span style="font-weight: bold;">incr_j</span>. |
|---|
| 4104 | Succesive file names are ordered as a matrix Name {j,i} with the index |
|---|
| 4105 | j varying the fastest. The parameter <span style="font-weight: bold;">nb_slice</span> can be |
|---|
| 4106 | introduced to scan the i index modulo nb_slice. <br> |
|---|
| 4107 | |
|---|
| 4108 | |
|---|
| 4109 | |
|---|
| 4110 | |
|---|
| 4111 | For pair indexing, the selected pair |
|---|
| 4112 | must be chosen in the menu <span style="font-weight: bold;">list_pair-civ</span> |
|---|
| 4113 | in the frame PAIRS (browse again an input field if this menu does not |
|---|
| 4114 | appear). Then the first_i and last_i refer to the 'reference indices'. |
|---|
| 4115 | With the option '*-*' in <span style="font-weight: bold;">list_pair-civ, |
|---|
| 4116 | </span>available |
|---|
| 4117 | pairs are automatically chosen (this is appropriate if several image |
|---|
| 4118 | pairs are used in a time series, to account for a changing mean |
|---|
| 4119 | velocity). <br> |
|---|
| 4120 | |
|---|
| 4121 | |
|---|
| 4122 | |
|---|
| 4123 | |
|---|
| 4124 | A projection object can be introduced by |
|---|
| 4125 | selecting |
|---|
| 4126 | the check box GetObject. If a projection object has been already |
|---|
| 4127 | created the opened interface set_object will be used. |
|---|
| 4128 | Otherwise |
|---|
| 4129 | the blank set_object interface appears, and a projection object can be |
|---|
| 4130 | imported from an existing xml Object file. <br> |
|---|
| 4131 | |
|---|
| 4132 | |
|---|
| 4133 | |
|---|
| 4134 | |
|---|
| 4135 | </div> |
|---|
| 4136 | |
|---|
| 4137 | |
|---|
| 4138 | |
|---|
| 4139 | |
|---|
| 4140 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId483256"></a>8-2 |
|---|
| 4141 | check_files:</h2> |
|---|
| 4142 | |
|---|
| 4143 | |
|---|
| 4144 | |
|---|
| 4145 | |
|---|
| 4146 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId191551"></a> |
|---|
| 4147 | Gives the series of files selected for processing and checks their |
|---|
| 4148 | existence. The oldest modified file is indicated, which is useful to |
|---|
| 4149 | detect whether any file in a civ processing is missing (then the |
|---|
| 4150 | oldest file is not updated). <br> |
|---|
| 4151 | |
|---|
| 4152 | |
|---|
| 4153 | |
|---|
| 4154 | |
|---|
| 4155 | For NetCDF files, the last operation made (civ1, fix1, patch1, |
|---|
| 4156 | civ2, fix2, patch2) is indicated. The details of each NetCDF file can |
|---|
| 4157 | be dispalyed by selecting it with the mouse on the list. |
|---|
| 4158 | </div> |
|---|
| 4159 | |
|---|
| 4160 | |
|---|
| 4161 | |
|---|
| 4162 | |
|---|
| 4163 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId310092"></a>8-3 |
|---|
| 4164 | aver_stat:</h2> |
|---|
| 4165 | |
|---|
| 4166 | |
|---|
| 4167 | |
|---|
| 4168 | |
|---|
| 4169 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId106189"></a> |
|---|
| 4170 | This option provides any average over |
|---|
| 4171 | the processed files. If <span style="font-style: italic;">nb_slice</span> |
|---|
| 4172 | is not equal to 1, the average is performed slice by slice, providing |
|---|
| 4173 | nb_slice results. If a projection object is selected (check |
|---|
| 4174 | box <span style="font-weight: bold;">GetObject</span>), |
|---|
| 4175 | the field is projected before averaging. <br> |
|---|
| 4176 | |
|---|
| 4177 | |
|---|
| 4178 | |
|---|
| 4179 | |
|---|
| 4180 | For unstructured coordinates varying for |
|---|
| 4181 | successive |
|---|
| 4182 | fields, the data is linearly interpolated on the coordinates of the |
|---|
| 4183 | first field in the series. It is then advised to project the fields on |
|---|
| 4184 | a regular grid, creating a projection object of type 'plane' with |
|---|
| 4185 | projection mode 'interp'. <br> |
|---|
| 4186 | |
|---|
| 4187 | |
|---|
| 4188 | |
|---|
| 4189 | |
|---|
| 4190 | With a projection object with title |
|---|
| 4191 | PATCH, the |
|---|
| 4192 | global histogram of field variables on the selected region will be |
|---|
| 4193 | obtained. <br> |
|---|
| 4194 | |
|---|
| 4195 | |
|---|
| 4196 | |
|---|
| 4197 | |
|---|
| 4198 | |
|---|
| 4199 | </div> |
|---|
| 4200 | |
|---|
| 4201 | |
|---|
| 4202 | |
|---|
| 4203 | |
|---|
| 4204 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId887562"></a>8-4 |
|---|
| 4205 | time_series:</h2> |
|---|
| 4206 | |
|---|
| 4207 | |
|---|
| 4208 | |
|---|
| 4209 | |
|---|
| 4210 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId672413"></a> |
|---|
| 4211 | This action provides a time series of the input field. It is |
|---|
| 4212 | advised to use a POINTS projection object, so the series is limited to |
|---|
| 4213 | the selected points. <br> |
|---|
| 4214 | |
|---|
| 4215 | |
|---|
| 4216 | |
|---|
| 4217 | |
|---|
| 4218 | </div> |
|---|
| 4219 | |
|---|
| 4220 | |
|---|
| 4221 | |
|---|
| 4222 | |
|---|
| 4223 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId109414"></a>8-5 |
|---|
| 4224 | merge_proj: </h2> |
|---|
| 4225 | |
|---|
| 4226 | |
|---|
| 4227 | |
|---|
| 4228 | |
|---|
| 4229 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId682822"></a> |
|---|
| 4230 | This option allows to merge several |
|---|
| 4231 | field |
|---|
| 4232 | series in a single one. This is useful to merge fields |
|---|
| 4233 | obtained |
|---|
| 4234 | with different cameras. Select the different series, activating the |
|---|
| 4235 | check box <span style="font-weight: bold;">add</span>. |
|---|
| 4236 | In this case, it is generally useful to first interpolate the fields on |
|---|
| 4237 | a single grid. For that purpose select the check box <span style="font-weight: bold;">GetObject, </span>creating |
|---|
| 4238 | a projection object of type 'plane' with projection mode 'interp'. <br> |
|---|
| 4239 | |
|---|
| 4240 | |
|---|
| 4241 | |
|---|
| 4242 | |
|---|
| 4243 | Since the different views have their own |
|---|
| 4244 | calibration, it is important to use the option 'phys' (menu <span style="font-weight: bold;">menu_coord</span>), and to |
|---|
| 4245 | create the grid in phys coordinates. <br> |
|---|
| 4246 | |
|---|
| 4247 | |
|---|
| 4248 | |
|---|
| 4249 | |
|---|
| 4250 | <span style="font-weight: bold;"></span> |
|---|
| 4251 | </div> |
|---|
| 4252 | |
|---|
| 4253 | |
|---|
| 4254 | |
|---|
| 4255 | |
|---|
| 4256 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId736727"></a>8-6 more...:</h2> |
|---|
| 4257 | |
|---|
| 4258 | |
|---|
| 4259 | |
|---|
| 4260 | |
|---|
| 4261 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId640736"></a> |
|---|
| 4262 | This action calls any user defined function by its name, acting on |
|---|
| 4263 | the series of fields defiend for ACTION. <br> |
|---|
| 4264 | |
|---|
| 4265 | |
|---|
| 4266 | |
|---|
| 4267 | |
|---|
| 4268 | Some examples of usr_defined functions are in the subdirectory |
|---|
| 4269 | UVMAT/USR_FCT. <br> |
|---|
| 4270 | |
|---|
| 4271 | |
|---|
| 4272 | |
|---|
| 4273 | |
|---|
| 4274 | <br> |
|---|
| 4275 | |
|---|
| 4276 | |
|---|
| 4277 | |
|---|
| 4278 | |
|---|
| 4279 | <u>List of available functions:</u> <br> |
|---|
| 4280 | |
|---|
| 4281 | |
|---|
| 4282 | |
|---|
| 4283 | |
|---|
| 4284 | -<strong>sub_background:</strong> used to removed a mean |
|---|
| 4285 | background to the images. This is useful before CIV processing when |
|---|
| 4286 | some fiked features are visible in the background (when the laser |
|---|
| 4287 | sheet is close to the bottom). <br> |
|---|
| 4288 | |
|---|
| 4289 | |
|---|
| 4290 | |
|---|
| 4291 | |
|---|
| 4292 | <br> |
|---|
| 4293 | |
|---|
| 4294 | |
|---|
| 4295 | |
|---|
| 4296 | |
|---|
| 4297 | To update (**):<br> |
|---|
| 4298 | |
|---|
| 4299 | |
|---|
| 4300 | |
|---|
| 4301 | |
|---|
| 4302 | -<strong>uvprofile</strong>: calculate the mean velocity |
|---|
| 4303 | profile |
|---|
| 4304 | and Reynolds stress u'v' along a band, averaged over the series of |
|---|
| 4305 | fields. <br> |
|---|
| 4306 | |
|---|
| 4307 | |
|---|
| 4308 | |
|---|
| 4309 | |
|---|
| 4310 | -<strong>view_ima3D:</strong> provides a perspective view |
|---|
| 4311 | of a 3D |
|---|
| 4312 | image defined by a series of slice 2D images. The isosurfaces of the |
|---|
| 4313 | scalar field are represented. <br> |
|---|
| 4314 | |
|---|
| 4315 | |
|---|
| 4316 | |
|---|
| 4317 | |
|---|
| 4318 | -<strong>part_stat:</strong> count particles and provides |
|---|
| 4319 | their |
|---|
| 4320 | density and luminosity histogramm |
|---|
| 4321 | </div> |
|---|
| 4322 | |
|---|
| 4323 | |
|---|
| 4324 | |
|---|
| 4325 | |
|---|
| 4326 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId360245"></a><a name="peaklocking"></a>Peaklocking |
|---|
| 4327 | errors:(to update |
|---|
| 4328 | **)</h2> |
|---|
| 4329 | |
|---|
| 4330 | |
|---|
| 4331 | |
|---|
| 4332 | |
|---|
| 4333 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId217145"></a> |
|---|
| 4334 | By selecting the press button 'peaklocking' on the 'plotgraph' |
|---|
| 4335 | interface, you smooth the current velocity histograms while |
|---|
| 4336 | preserving its integral over each unity (in pixels). This appears in |
|---|
| 4337 | red. Then an estimate of the peaklocking error is obtained by |
|---|
| 4338 | comparing the initial histogram to the smooth one.<br> |
|---|
| 4339 | |
|---|
| 4340 | |
|---|
| 4341 | |
|---|
| 4342 | |
|---|
| 4343 | <br> |
|---|
| 4344 | |
|---|
| 4345 | |
|---|
| 4346 | |
|---|
| 4347 | |
|---|
| 4348 | </div> |
|---|
| 4349 | |
|---|
| 4350 | |
|---|
| 4351 | |
|---|
| 4352 | |
|---|
| 4353 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId280008"></a><a name="editxml"></a>9 |
|---|
| 4354 | The GUI editxml.fig:</h1> |
|---|
| 4355 | |
|---|
| 4356 | |
|---|
| 4357 | |
|---|
| 4358 | |
|---|
| 4359 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 4360 | |
|---|
| 4361 | |
|---|
| 4362 | |
|---|
| 4363 | |
|---|
| 4364 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId215335"></a> |
|---|
| 4365 | This GUI <a href="FUNCTIONS_DOC/editxml.html">editxml.fig</a> |
|---|
| 4366 | visualises xml files. It is automatically called by the browser of |
|---|
| 4367 | uvmat when a file .xml is opened.<br> |
|---|
| 4368 | |
|---|
| 4369 | |
|---|
| 4370 | |
|---|
| 4371 | |
|---|
| 4372 | When an input file is opened, editxml |
|---|
| 4373 | detects the title key, e.g. ImaDoc, and looks for the corresponding xml |
|---|
| 4374 | schema (e.g. ImaDoc.xsd ). This schema is sought in |
|---|
| 4375 | the directory defined by <SchemaPath> in the installation |
|---|
| 4376 | file <a href="../PARAM_LINUX.xml">PARAM_LINUX</a> |
|---|
| 4377 | or <a href="../PARAM_WIN.xml">PARAM_WIN</a> of |
|---|
| 4378 | uvmat. If the schema is fund, the hierarchical structure and keys given |
|---|
| 4379 | by the schema are diplayed. Otherwise the keys of |
|---|
| 4380 | the xml file are displayed. <br> |
|---|
| 4381 | |
|---|
| 4382 | |
|---|
| 4383 | |
|---|
| 4384 | |
|---|
| 4385 | Simple elements in the xml |
|---|
| 4386 | file are listed in the forme 'key'='value', and the |
|---|
| 4387 | corresponding attributes are shown in green. Comments from the schema |
|---|
| 4388 | are dispalyed in blue. Complex elements are indicated by '+'. Selecting |
|---|
| 4389 | them on the list gives access to the lower hierarchical |
|---|
| 4390 | level. Press the arrow '<---' to move back |
|---|
| 4391 | upward in the hierarchy. <br> |
|---|
| 4392 | |
|---|
| 4393 | |
|---|
| 4394 | |
|---|
| 4395 | |
|---|
| 4396 | Manual editing of element |
|---|
| 4397 | value is possible. Select the element and use the lower edit box. This |
|---|
| 4398 | edit box transforms in a menu when a preselected list of allowed input |
|---|
| 4399 | values has been set by the schema. <br> |
|---|
| 4400 | |
|---|
| 4401 | |
|---|
| 4402 | |
|---|
| 4403 | |
|---|
| 4404 | </div> |
|---|
| 4405 | |
|---|
| 4406 | |
|---|
| 4407 | |
|---|
| 4408 | |
|---|
| 4409 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId609725"></a><a name="civ"></a>10 |
|---|
| 4410 | Particle Imaging Velocimetry (PIV)</h1> |
|---|
| 4411 | |
|---|
| 4412 | |
|---|
| 4413 | |
|---|
| 4414 | |
|---|
| 4415 | <p style="text-align: justify;"><a href="uvmat_doc.html#top"><img style="border: 0px solid ; width: 23px; height: 49px;" alt="AG00112_.gif (1861 bytes)" src="AG00112_.gif"></a><a href="uvmat_doc.html#top">Back to the Top</a></p> |
|---|
| 4416 | |
|---|
| 4417 | |
|---|
| 4418 | |
|---|
| 4419 | |
|---|
| 4420 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId109414"></a>10-1 |
|---|
| 4421 | Civ operations:</h2> |
|---|
| 4422 | |
|---|
| 4423 | |
|---|
| 4424 | |
|---|
| 4425 | |
|---|
| 4426 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId1082"></a> |
|---|
| 4427 | The<strong style="font-weight: normal;"> <span style="text-decoration: underline;">civ.fig</span></strong><span style="font-weight: bold;"> </span>interface |
|---|
| 4428 | processing can be |
|---|
| 4429 | directly |
|---|
| 4430 | opened by the <strong style="font-weight: normal;">'civ'</strong> |
|---|
| 4431 | command on the Matlab |
|---|
| 4432 | prompt. Then |
|---|
| 4433 | a documentation file (.xml or .civ) should be enter to begin. It can be |
|---|
| 4434 | also opened by uvmat, activating the pusch button<strong> civ</strong>. |
|---|
| 4435 | With the fields option <strong>images</strong> |
|---|
| 4436 | it sets the interface at the default starting operation civ1. With |
|---|
| 4437 | the other fields options, it detects the state of processing of the |
|---|
| 4438 | existing NetCDF files, and proposes the next operation (fix1, patch1, |
|---|
| 4439 | civ2...). A third way of opening the interface is just to open the |
|---|
| 4440 | Matlab image (.fig file) stored after each processing in the |
|---|
| 4441 | directory of the .civ file. Then just edit it and run a new |
|---|
| 4442 | calculation. <br> |
|---|
| 4443 | |
|---|
| 4444 | |
|---|
| 4445 | |
|---|
| 4446 | |
|---|
| 4447 | First check the root name in the top edit box, and the series of |
|---|
| 4448 | fields. Then set the chosen series of |
|---|
| 4449 | operation by the check boxes on the left; The corresponding menus |
|---|
| 4450 | appear. <br> |
|---|
| 4451 | |
|---|
| 4452 | |
|---|
| 4453 | |
|---|
| 4454 | |
|---|
| 4455 | <br> |
|---|
| 4456 | |
|---|
| 4457 | |
|---|
| 4458 | |
|---|
| 4459 | |
|---|
| 4460 | <span style="font-style: italic; font-weight: bold;">CIV1:</span><span style="font-style: italic; font-weight: bold;"> </span>The |
|---|
| 4461 | main parameters is the chosen image pair in the |
|---|
| 4462 | left menu, the size of the correlation box (<strong>ibx, iby</strong>), |
|---|
| 4463 | the search range defined by its size in pixels (<strong>isx, isy</strong>) |
|---|
| 4464 | and a systematic shift (<strong>shift x,y</strong>). The |
|---|
| 4465 | default |
|---|
| 4466 | value 21x21 is generally good, use a larger size for images with few |
|---|
| 4467 | particles, use an elongated box (e.g. 11x41) to optimize the |
|---|
| 4468 | resolution in one direction (for instance in a boundary layer). The |
|---|
| 4469 | search parameters (<strong>isx, isy</strong>,<strong>shift |
|---|
| 4470 | x,y</strong>) |
|---|
| 4471 | can be estimated using the press button <strong>calcul search |
|---|
| 4472 | range</strong>. |
|---|
| 4473 | First introduce the estimated minimum and maximum values of each |
|---|
| 4474 | velocity component u and v. The result depends on the time interval |
|---|
| 4475 | of the image pair. Change the selected image pair if the maximum |
|---|
| 4476 | displacement (ibsx-ibx)/2 is too small (lack of precision) or too |
|---|
| 4477 | large (bad image correlations and risks of faulse vectors). A good |
|---|
| 4478 | typical displacement is 5-10 pixels. A parameter <strong>rho</strong> |
|---|
| 4479 | controls the smoothing of the image corelation curves used in civ, |
|---|
| 4480 | the default value 1 is generally used. <br> |
|---|
| 4481 | |
|---|
| 4482 | |
|---|
| 4483 | |
|---|
| 4484 | |
|---|
| 4485 | The grid determines the central |
|---|
| 4486 | positions of the correlation boxes |
|---|
| 4487 | (in pixels). A default regular grid can be set by the meshes <strong>dx</strong> |
|---|
| 4488 | and <strong>dy</strong> |
|---|
| 4489 | (in pixels). A custom grid can be stored in a |
|---|
| 4490 | text file, and selected by the GET_GRID push button. This is |
|---|
| 4491 | convenient to limitate the processing to a subregion or to fine tune |
|---|
| 4492 | the resolution. See the site http://www.civproject.org/documentation |
|---|
| 4493 | for the file format. The function MISC_FCT/makegrid.m in UVMAT |
|---|
| 4494 | creates an example. An alternating way to select a subregion is to |
|---|
| 4495 | use a mask image. If a mask image with an appropriate name is found |
|---|
| 4496 | in the image directory, it wil be detected by the pushbutton |
|---|
| 4497 | GET_MASK, and the indication xxmask appears in the edit box. (xx is |
|---|
| 4498 | the number of slices, equal to 1 for a single mask). Finally |
|---|
| 4499 | thresholds on image intensity can be introduced to suppress |
|---|
| 4500 | underexposed or overexposed parts of the image: select the check box <span style="font-weight: bold;">ImaThresh</span> |
|---|
| 4501 | ('THRESH'), and edit the boxes <span style="font-weight: bold;">MinIma</span> |
|---|
| 4502 | and <span style="font-weight: bold;">MaxIma</span> |
|---|
| 4503 | which then appear. <br> |
|---|
| 4504 | |
|---|
| 4505 | |
|---|
| 4506 | |
|---|
| 4507 | |
|---|
| 4508 | The velocity results are stored |
|---|
| 4509 | in the subdirectory set by SUBDIR_CIV1. <br> |
|---|
| 4510 | |
|---|
| 4511 | |
|---|
| 4512 | |
|---|
| 4513 | |
|---|
| 4514 | <br> |
|---|
| 4515 | |
|---|
| 4516 | |
|---|
| 4517 | |
|---|
| 4518 | |
|---|
| 4519 | <span style="font-style: italic; font-weight: bold;">FIX1:</span><u> |
|---|
| 4520 | </u>used after civ1 to remove some false vectors using |
|---|
| 4521 | different criteria. Use generally the default options on vec_F. A |
|---|
| 4522 | threshold on the image correlation values (vec_C) can be introduced. |
|---|
| 4523 | Use first a small threshold 0.2, look at the resulting fields, by |
|---|
| 4524 | looking at red vectors in the view_field menu. If many red vectors |
|---|
| 4525 | appear, redo the fix operation with a higher threshold. A threshold |
|---|
| 4526 | on the velocity values can be also introduced: erratic zero velocity |
|---|
| 4527 | vectors can be indeed produced by a fixed image background. A mask |
|---|
| 4528 | image can be also introduced. It has the same effect as the one used |
|---|
| 4529 | in civ1, but the removed vectors are kept in memory, and labelled as |
|---|
| 4530 | false. <br> |
|---|
| 4531 | |
|---|
| 4532 | |
|---|
| 4533 | |
|---|
| 4534 | |
|---|
| 4535 | With a civ field selected and a second field, for instance filter, |
|---|
| 4536 | you can remove all vectors whose difference with the second field |
|---|
| 4537 | exceeds a threshold. <br> |
|---|
| 4538 | |
|---|
| 4539 | |
|---|
| 4540 | |
|---|
| 4541 | |
|---|
| 4542 | Interactive fixing with the mouse is also possible, see <a href="vectors">section 3.2</a>, but it is not |
|---|
| 4543 | recommended. <br> |
|---|
| 4544 | |
|---|
| 4545 | |
|---|
| 4546 | |
|---|
| 4547 | |
|---|
| 4548 | <br> |
|---|
| 4549 | |
|---|
| 4550 | |
|---|
| 4551 | |
|---|
| 4552 | |
|---|
| 4553 | <span style="font-style: italic; font-weight: bold;">PATCH1:</span> |
|---|
| 4554 | interpolates the velocity values on a regular grid |
|---|
| 4555 | with a smoothing parameter<strong> rho</strong>. This also |
|---|
| 4556 | provides |
|---|
| 4557 | the spatial derivatives (vorticity, divergence) needed for the |
|---|
| 4558 | refined processing civ2. The numbers of grid points in x and y are |
|---|
| 4559 | set by<strong> nx</strong> and <strong>ny</strong>. |
|---|
| 4560 | The vectors which |
|---|
| 4561 | are too far from the smoothed field (erratic vectors) can be |
|---|
| 4562 | eliminated, using a threshold expressed in pixel displacement. The |
|---|
| 4563 | thin plate spline method must be done by subdomains for computational |
|---|
| 4564 | saving, use the default value 300. <br> |
|---|
| 4565 | |
|---|
| 4566 | |
|---|
| 4567 | |
|---|
| 4568 | |
|---|
| 4569 | <br> |
|---|
| 4570 | |
|---|
| 4571 | |
|---|
| 4572 | |
|---|
| 4573 | |
|---|
| 4574 | <span style="font-style: italic; font-weight: bold;">CIV2:</span><span style="font-style: italic; font-weight: bold;"> </span>provides |
|---|
| 4575 | a refined calculation of the velocity field, |
|---|
| 4576 | using the civ1 result as previous estimate. The search range is |
|---|
| 4577 | determined by the civ1 field so there is no parameter. Use the option <strong>decimal |
|---|
| 4578 | shift</strong> to reduce peaklocking |
|---|
| 4579 | effects |
|---|
| 4580 | (advised). The option <strong>deformation</strong> is |
|---|
| 4581 | useful in the |
|---|
| 4582 | presence of strong shear or vorticity. Then image deformation and |
|---|
| 4583 | rotation is introduced before calculating the correlations. The other |
|---|
| 4584 | parameters (<strong>rho, ibx,iby, grid, mask</strong>) are |
|---|
| 4585 | used like |
|---|
| 4586 | for civ1 (take the same by default). The image pair for civ2 can be |
|---|
| 4587 | different than the one used in civ1 to get the first estimate. It is |
|---|
| 4588 | generally advised to use a moderate time interval for civ1, to avoid |
|---|
| 4589 | false vectors, and to take a larger intervel for civ2, in order to |
|---|
| 4590 | optimize precision. As civ2 already knows where to look and takes |
|---|
| 4591 | into account image strain and rotation (with the option deformation) |
|---|
| 4592 | it allows for higher time intervals. <br> |
|---|
| 4593 | |
|---|
| 4594 | |
|---|
| 4595 | |
|---|
| 4596 | |
|---|
| 4597 | <br> |
|---|
| 4598 | |
|---|
| 4599 | |
|---|
| 4600 | |
|---|
| 4601 | |
|---|
| 4602 | <span style="font-style: italic; font-weight: bold;">FIX2:</span> |
|---|
| 4603 | like FIX1, except for the different flags vec_F |
|---|
| 4604 | provided by civ2. Use the default options. <br> |
|---|
| 4605 | |
|---|
| 4606 | |
|---|
| 4607 | |
|---|
| 4608 | |
|---|
| 4609 | <br> |
|---|
| 4610 | |
|---|
| 4611 | |
|---|
| 4612 | |
|---|
| 4613 | |
|---|
| 4614 | <span style="font-style: italic;">PATCH2:</span> |
|---|
| 4615 | like PATCH1 <br> |
|---|
| 4616 | |
|---|
| 4617 | |
|---|
| 4618 | |
|---|
| 4619 | |
|---|
| 4620 | <br> |
|---|
| 4621 | |
|---|
| 4622 | |
|---|
| 4623 | |
|---|
| 4624 | |
|---|
| 4625 | <span style="font-style: italic; font-weight: bold;">Further |
|---|
| 4626 | iterations:</span> improvements can be obtained by further |
|---|
| 4627 | iterations of the civ2-fix2-patch2 process. Open again the interface, |
|---|
| 4628 | and consider the previous civ2 result as the prior guess civ1. It |
|---|
| 4629 | will be recopied and relabelled as civ1 in the new NetCDF file |
|---|
| 4630 | produced. <br> |
|---|
| 4631 | |
|---|
| 4632 | |
|---|
| 4633 | |
|---|
| 4634 | |
|---|
| 4635 | <br> |
|---|
| 4636 | |
|---|
| 4637 | |
|---|
| 4638 | |
|---|
| 4639 | |
|---|
| 4640 | </div> |
|---|
| 4641 | |
|---|
| 4642 | |
|---|
| 4643 | |
|---|
| 4644 | |
|---|
| 4645 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId178080"></a>10-2 |
|---|
| 4646 | Codes for vector flags:</h2> |
|---|
| 4647 | |
|---|
| 4648 | |
|---|
| 4649 | |
|---|
| 4650 | |
|---|
| 4651 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId393398"></a> |
|---|
| 4652 | <u>Code for vec_F:</u> </div> |
|---|
| 4653 | |
|---|
| 4654 | |
|---|
| 4655 | |
|---|
| 4656 | |
|---|
| 4657 | <ul style="text-align: justify;"> |
|---|
| 4658 | |
|---|
| 4659 | |
|---|
| 4660 | |
|---|
| 4661 | |
|---|
| 4662 | <li> |
|---|
| 4663 | |
|---|
| 4664 | |
|---|
| 4665 | |
|---|
| 4666 | <p style="margin-bottom: 0cm;">vec_F(i)=1 : default , |
|---|
| 4667 | evrything is fine </p> |
|---|
| 4668 | |
|---|
| 4669 | |
|---|
| 4670 | |
|---|
| 4671 | |
|---|
| 4672 | </li> |
|---|
| 4673 | |
|---|
| 4674 | |
|---|
| 4675 | |
|---|
| 4676 | |
|---|
| 4677 | <li> |
|---|
| 4678 | |
|---|
| 4679 | |
|---|
| 4680 | |
|---|
| 4681 | <p style="margin-bottom: 0cm;">vec_F(i)=-2: the |
|---|
| 4682 | maximum of the correlation function is close to the border: the search |
|---|
| 4683 | domain is too small </p> |
|---|
| 4684 | |
|---|
| 4685 | |
|---|
| 4686 | |
|---|
| 4687 | |
|---|
| 4688 | </li> |
|---|
| 4689 | |
|---|
| 4690 | |
|---|
| 4691 | |
|---|
| 4692 | |
|---|
| 4693 | <li> |
|---|
| 4694 | |
|---|
| 4695 | |
|---|
| 4696 | |
|---|
| 4697 | <p style="margin-bottom: 0cm;">vec_F(i)=2: (only in |
|---|
| 4698 | civ1) we keep the inaccurate Hart result (resulting from averaging with |
|---|
| 4699 | neighborhing points) and vec_C(i)=0 is chosen by convention. </p> |
|---|
| 4700 | |
|---|
| 4701 | |
|---|
| 4702 | |
|---|
| 4703 | |
|---|
| 4704 | </li> |
|---|
| 4705 | |
|---|
| 4706 | |
|---|
| 4707 | |
|---|
| 4708 | |
|---|
| 4709 | <li> |
|---|
| 4710 | |
|---|
| 4711 | |
|---|
| 4712 | |
|---|
| 4713 | <p style="margin-bottom: 0cm;">vec_F(i)=3: the |
|---|
| 4714 | optimization of the correlation function is unstable |
|---|
| 4715 | or local Intensity rms of the image =0 </p> |
|---|
| 4716 | |
|---|
| 4717 | |
|---|
| 4718 | |
|---|
| 4719 | |
|---|
| 4720 | </li> |
|---|
| 4721 | |
|---|
| 4722 | |
|---|
| 4723 | |
|---|
| 4724 | |
|---|
| 4725 | <li> |
|---|
| 4726 | |
|---|
| 4727 | |
|---|
| 4728 | |
|---|
| 4729 | <p style="margin-bottom: 0cm;">vec_F(i)=4:only in |
|---|
| 4730 | civ2: the difference between the estimator and the result is more than |
|---|
| 4731 | 1 pixel </p> |
|---|
| 4732 | |
|---|
| 4733 | |
|---|
| 4734 | |
|---|
| 4735 | |
|---|
| 4736 | </li> |
|---|
| 4737 | |
|---|
| 4738 | |
|---|
| 4739 | |
|---|
| 4740 | |
|---|
| 4741 | <li> |
|---|
| 4742 | |
|---|
| 4743 | |
|---|
| 4744 | |
|---|
| 4745 | <p>vec_F(i)=1 . :vectors manually selected by <b>uvmat</b> |
|---|
| 4746 | for removalhave a value 1 for the second digit, in front of |
|---|
| 4747 | the vec_F unit value. </p> |
|---|
| 4748 | |
|---|
| 4749 | |
|---|
| 4750 | |
|---|
| 4751 | |
|---|
| 4752 | |
|---|
| 4753 | |
|---|
| 4754 | |
|---|
| 4755 | <p><u>Code for FixFlag:</u> </p> |
|---|
| 4756 | |
|---|
| 4757 | |
|---|
| 4758 | |
|---|
| 4759 | |
|---|
| 4760 | </li> |
|---|
| 4761 | |
|---|
| 4762 | |
|---|
| 4763 | |
|---|
| 4764 | |
|---|
| 4765 | <li> |
|---|
| 4766 | |
|---|
| 4767 | |
|---|
| 4768 | |
|---|
| 4769 | <p style="margin-bottom: 0cm;">FixFlag(i)=0 :default, |
|---|
| 4770 | everything is fine </p> |
|---|
| 4771 | |
|---|
| 4772 | |
|---|
| 4773 | |
|---|
| 4774 | |
|---|
| 4775 | </li> |
|---|
| 4776 | |
|---|
| 4777 | |
|---|
| 4778 | |
|---|
| 4779 | |
|---|
| 4780 | <li> |
|---|
| 4781 | |
|---|
| 4782 | |
|---|
| 4783 | |
|---|
| 4784 | <p style="margin-bottom: 0cm;">FixFlag(i)=1. : value 1 |
|---|
| 4785 | for the second digit: vector removed by criteria on vec_F or/and low |
|---|
| 4786 | correlation value </p> |
|---|
| 4787 | |
|---|
| 4788 | |
|---|
| 4789 | |
|---|
| 4790 | |
|---|
| 4791 | </li> |
|---|
| 4792 | |
|---|
| 4793 | |
|---|
| 4794 | |
|---|
| 4795 | |
|---|
| 4796 | <li> |
|---|
| 4797 | |
|---|
| 4798 | |
|---|
| 4799 | |
|---|
| 4800 | <p style="margin-bottom: 0cm;">FixFlag(i)=1..: value 1 |
|---|
| 4801 | for the third digit: vector selected by a criterium of difference with |
|---|
| 4802 | another field, for instance filter, or a field with differnt time |
|---|
| 4803 | interval. </p> |
|---|
| 4804 | |
|---|
| 4805 | |
|---|
| 4806 | |
|---|
| 4807 | |
|---|
| 4808 | </li> |
|---|
| 4809 | |
|---|
| 4810 | |
|---|
| 4811 | |
|---|
| 4812 | |
|---|
| 4813 | <li> |
|---|
| 4814 | |
|---|
| 4815 | |
|---|
| 4816 | |
|---|
| 4817 | <p>FixFlag(i)=...1, 2, 3 different criteria for |
|---|
| 4818 | elimination set by the program Fix of CIVx (not yet documented). </p> |
|---|
| 4819 | |
|---|
| 4820 | |
|---|
| 4821 | |
|---|
| 4822 | |
|---|
| 4823 | </li> |
|---|
| 4824 | |
|---|
| 4825 | |
|---|
| 4826 | |
|---|
| 4827 | |
|---|
| 4828 | </ul> |
|---|
| 4829 | |
|---|
| 4830 | |
|---|
| 4831 | |
|---|
| 4832 | |
|---|
| 4833 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId109414"></a>10-3 |
|---|
| 4834 | <span style="font-weight: bold;">RUN and BATCH:</span> </h2> |
|---|
| 4835 | |
|---|
| 4836 | |
|---|
| 4837 | |
|---|
| 4838 | |
|---|
| 4839 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId558175"></a> |
|---|
| 4840 | RUN controls the computation from the |
|---|
| 4841 | Matlab |
|---|
| 4842 | window, which you cannot use until the computations are finished, |
|---|
| 4843 | while BATCH sends the same computations as background computing tasks |
|---|
| 4844 | in the network. In the first option, the civ1 computations are first |
|---|
| 4845 | perfomed fo all the fields, then the fix1, then the patch1.... In the |
|---|
| 4846 | batch option, the whole series of computations is performed for the |
|---|
| 4847 | first field, and then repeated for each successive field. <br> |
|---|
| 4848 | |
|---|
| 4849 | |
|---|
| 4850 | |
|---|
| 4851 | |
|---|
| 4852 | In both cases, the status of the |
|---|
| 4853 | computations can be checked by |
|---|
| 4854 | opening .cmx and .log files, using the uvmat browser or any text |
|---|
| 4855 | editor. These files are writtent in the same subdirectory as the NetCDF |
|---|
| 4856 | result files. Each .cmx file contains the set of parameters |
|---|
| 4857 | used for a civ computation. It is written by the civ interface just |
|---|
| 4858 | before ordering the computations. By contrast , the .log file is |
|---|
| 4859 | produced after completion of the computations, and it contains some |
|---|
| 4860 | information on the process, including possibly error messages. <br> |
|---|
| 4861 | |
|---|
| 4862 | |
|---|
| 4863 | |
|---|
| 4864 | |
|---|
| 4865 | <br> |
|---|
| 4866 | |
|---|
| 4867 | |
|---|
| 4868 | |
|---|
| 4869 | |
|---|
| 4870 | </div> |
|---|
| 4871 | |
|---|
| 4872 | |
|---|
| 4873 | |
|---|
| 4874 | |
|---|
| 4875 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId491591"></a><span style="font-weight: bold;">10-4 Displacement between two |
|---|
| 4876 | image series:</span> </h2> |
|---|
| 4877 | |
|---|
| 4878 | |
|---|
| 4879 | |
|---|
| 4880 | |
|---|
| 4881 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId954071"></a> |
|---|
| 4882 | This can be useful for steroscopic view, |
|---|
| 4883 | or to |
|---|
| 4884 | compare series of images to a reference, to measure displacement rather |
|---|
| 4885 | than velocity. For that purpose select the check box <span style="font-weight: bold;">compare</span> ( <span style="font-weight: bold;">'-'</span> )on the top |
|---|
| 4886 | left, and browse the second file, or edit manually the edit boxes <span style="font-weight: bold;">displ_filebase</span> and <span style="font-weight: bold;">displ_filebase_1</span>. <br> |
|---|
| 4887 | |
|---|
| 4888 | |
|---|
| 4889 | |
|---|
| 4890 | |
|---|
| 4891 | Then select the option 'displacement'. A |
|---|
| 4892 | file with |
|---|
| 4893 | recognized indexing will be varied with the same index in each series |
|---|
| 4894 | (appropiate for stereo view), while a second file with no index will |
|---|
| 4895 | remain unchanged (approprite for a fixed reference). <br> |
|---|
| 4896 | |
|---|
| 4897 | |
|---|
| 4898 | |
|---|
| 4899 | |
|---|
| 4900 | <br> |
|---|
| 4901 | |
|---|
| 4902 | |
|---|
| 4903 | |
|---|
| 4904 | |
|---|
| 4905 | </div> |
|---|
| 4906 | |
|---|
| 4907 | |
|---|
| 4908 | |
|---|
| 4909 | |
|---|
| 4910 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId118098"></a><span style="font-weight: bold;">10-5 Stereoscopic PIV:</span><span style="font-weight: bold; font-style: italic;"> </span><span style="font-weight: bold;"></span></h2> |
|---|
| 4911 | |
|---|
| 4912 | |
|---|
| 4913 | |
|---|
| 4914 | |
|---|
| 4915 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId650824"></a> |
|---|
| 4916 | To<span style="font-weight: bold; font-style: italic;"> </span><span style="font-style: italic;"></span>obtain the three |
|---|
| 4917 | velocity components in a plane with stereoscopic PIV, use the following |
|---|
| 4918 | procedure:<br> |
|---|
| 4919 | |
|---|
| 4920 | |
|---|
| 4921 | |
|---|
| 4922 | |
|---|
| 4923 | <br> |
|---|
| 4924 | |
|---|
| 4925 | |
|---|
| 4926 | |
|---|
| 4927 | |
|---|
| 4928 | <span style="font-style: italic; font-weight: bold;">Install |
|---|
| 4929 | two cameras</span> |
|---|
| 4930 | viewing a common field with angle about 45 ° on each side. A |
|---|
| 4931 | system |
|---|
| 4932 | of titled objective lenses (Sheimpflug) allows to optimize the focus in |
|---|
| 4933 | the whole image. <br> |
|---|
| 4934 | |
|---|
| 4935 | |
|---|
| 4936 | |
|---|
| 4937 | |
|---|
| 4938 | <br> |
|---|
| 4939 | |
|---|
| 4940 | |
|---|
| 4941 | |
|---|
| 4942 | |
|---|
| 4943 | <span style="font-style: italic; font-weight: bold;">Make |
|---|
| 4944 | a careful geometric calibration</span>, |
|---|
| 4945 | by taking the images of a grid positioned in the plane of the laser |
|---|
| 4946 | sheet used for particle illumination. Introduce a Tsai calibration with |
|---|
| 4947 | the calibration tool associated with the image acquisition |
|---|
| 4948 | software Acquix. Calibration can be adjusted with the uvmat interface |
|---|
| 4949 | (see <a href="#calib">calibration</a>). <br> |
|---|
| 4950 | |
|---|
| 4951 | |
|---|
| 4952 | |
|---|
| 4953 | |
|---|
| 4954 | This calibration model is valid in air |
|---|
| 4955 | or with an |
|---|
| 4956 | interface air-water perpendicular to the line of sight for each camera. |
|---|
| 4957 | Otherwise, the calibration problem is more complex. <br> |
|---|
| 4958 | |
|---|
| 4959 | |
|---|
| 4960 | |
|---|
| 4961 | |
|---|
| 4962 | <br> |
|---|
| 4963 | |
|---|
| 4964 | |
|---|
| 4965 | |
|---|
| 4966 | |
|---|
| 4967 | <span style="font-weight: bold; font-style: italic;">Perform |
|---|
| 4968 | usual PIV for each image series:</span> <br> |
|---|
| 4969 | |
|---|
| 4970 | |
|---|
| 4971 | |
|---|
| 4972 | |
|---|
| 4973 | The images from each camera (camA and |
|---|
| 4974 | camB) must be |
|---|
| 4975 | in the same directory and the PIV results in a single subdirectory. It |
|---|
| 4976 | is advised to do the successive operations including civ2 and fix2. |
|---|
| 4977 | This double series of PIV processing can be done in two steps (keeping |
|---|
| 4978 | the same CIV subdirectory) or simulatenously, using the <span style="font-weight: bold;">compare</span> (<span style="font-weight: bold;">'-'</span>) option. |
|---|
| 4979 | Then the check boxed <span style="font-weight: bold;">test_stereo1</span> |
|---|
| 4980 | and <span style="font-weight: bold;">test_stereo2</span> |
|---|
| 4981 | in the<span style="font-weight: bold;"> PATCH1</span> |
|---|
| 4982 | and <span style="font-weight: bold;">PATCH2</span> |
|---|
| 4983 | frames must be unselected. <br> |
|---|
| 4984 | |
|---|
| 4985 | |
|---|
| 4986 | |
|---|
| 4987 | |
|---|
| 4988 | For PIV near a staigth wall, it is |
|---|
| 4989 | advised to create |
|---|
| 4990 | a grid for each image series, corresponding to a common array of |
|---|
| 4991 | physical positions. This can be done by the pusch button <span style="font-weight: bold;">grid</span> in uvmat |
|---|
| 4992 | (bottom right).<br> |
|---|
| 4993 | |
|---|
| 4994 | |
|---|
| 4995 | |
|---|
| 4996 | |
|---|
| 4997 | <br> |
|---|
| 4998 | |
|---|
| 4999 | |
|---|
| 5000 | |
|---|
| 5001 | |
|---|
| 5002 | <span style="font-weight: bold; font-style: italic;">Combine |
|---|
| 5003 | PIV fields:</span> this is done by selecting <span style="font-weight: bold;">PATCH1</span> and |
|---|
| 5004 | <span style="font-weight: bold;">test_stereo1 </span>(at |
|---|
| 5005 | level civ1), or<span style="font-weight: bold;"> </span><span style="font-weight: bold;">PATCH2</span> and |
|---|
| 5006 | test_stereo2 (at level civ2) in the stereo mode (check box <span style="font-weight: bold;">compare</span> |
|---|
| 5007 | selected). The resulting fields camA-camB are in physical coordinates. |
|---|
| 5008 | They are final results which cannot be processed for further Civ |
|---|
| 5009 | operations: one must go back to the two image series for that purpose. |
|---|
| 5010 | Note that this stereo combination is only possible in the RUN |
|---|
| 5011 | mode for the moment (no BATCH)**. <br> |
|---|
| 5012 | |
|---|
| 5013 | |
|---|
| 5014 | |
|---|
| 5015 | |
|---|
| 5016 | <br> |
|---|
| 5017 | |
|---|
| 5018 | |
|---|
| 5019 | |
|---|
| 5020 | |
|---|
| 5021 | </div> |
|---|
| 5022 | |
|---|
| 5023 | |
|---|
| 5024 | |
|---|
| 5025 | |
|---|
| 5026 | <h2 style="text-align: justify;"><a class="mozTocH2" name="mozTocId691001"></a><span style="font-weight: bold;">10-6 3D PIV in a volume:(to be |
|---|
| 5027 | implemented**)</span></h2> |
|---|
| 5028 | |
|---|
| 5029 | |
|---|
| 5030 | |
|---|
| 5031 | |
|---|
| 5032 | <div style="text-align: justify;"></div> |
|---|
| 5033 | |
|---|
| 5034 | |
|---|
| 5035 | |
|---|
| 5036 | |
|---|
| 5037 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId280008"></a>11 |
|---|
| 5038 | LIF:(to update **)</h1> |
|---|
| 5039 | |
|---|
| 5040 | |
|---|
| 5041 | |
|---|
| 5042 | <br> |
|---|
| 5043 | |
|---|
| 5044 | |
|---|
| 5045 | |
|---|
| 5046 | <h1 style="text-align: justify;"><a class="mozTocH1" name="mozTocId67078"></a><a name="SECTION000110000000000000000"></a>About this |
|---|
| 5047 | document |
|---|
| 5048 | ...</h1> |
|---|
| 5049 | |
|---|
| 5050 | |
|---|
| 5051 | |
|---|
| 5052 | |
|---|
| 5053 | <p style="text-align: justify;"><b>UVMAT HELP</b> |
|---|
| 5054 | </p> |
|---|
| 5055 | |
|---|
| 5056 | |
|---|
| 5057 | |
|---|
| 5058 | |
|---|
| 5059 | <p style="text-align: justify;">This document was |
|---|
| 5060 | generated using the <a href="http://www.latex2html.org/"><b>LaTeX</b>2<tt>HTML</tt></a> |
|---|
| 5061 | translator Version 2002 (1.62) </p> |
|---|
| 5062 | |
|---|
| 5063 | |
|---|
| 5064 | |
|---|
| 5065 | |
|---|
| 5066 | <p style="text-align: justify;">Copyright © 1993, |
|---|
| 5067 | 1994, 1995, 1996, <a href="http://cbl.leeds.ac.uk/nikos/personal.html">Nikos |
|---|
| 5068 | Drakos</a> , Computer Based Learning Unit, University of Leeds. <br> |
|---|
| 5069 | |
|---|
| 5070 | |
|---|
| 5071 | |
|---|
| 5072 | |
|---|
| 5073 | Copyright © 1997, 1998, 1999, <a href="http://www.maths.mq.edu.au/%7Eross/">Ross |
|---|
| 5074 | Moore</a> , Mathematics Department, Macquarie University, Sydney. |
|---|
| 5075 | </p> |
|---|
| 5076 | |
|---|
| 5077 | |
|---|
| 5078 | |
|---|
| 5079 | |
|---|
| 5080 | <p style="text-align: justify;">The command line arguments |
|---|
| 5081 | were: <br> |
|---|
| 5082 | |
|---|
| 5083 | |
|---|
| 5084 | |
|---|
| 5085 | |
|---|
| 5086 | <b>latex2html</b> <tt>-no_subdir |
|---|
| 5087 | -split 0 -show_section_numbers |
|---|
| 5088 | /tmp/lyx_tmpdir24503WtIvn5/lyx_tmpbuf24503v5Erql/uvmat_doc.tex</tt> |
|---|
| 5089 | </p> |
|---|
| 5090 | |
|---|
| 5091 | |
|---|
| 5092 | |
|---|
| 5093 | |
|---|
| 5094 | <div style="text-align: justify;"><a class="mozTocDIV" name="mozTocId600163"></a> |
|---|
| 5095 | </div> |
|---|
| 5096 | |
|---|
| 5097 | |
|---|
| 5098 | |
|---|
| 5099 | |
|---|
| 5100 | <p style="text-align: justify;">The translation was |
|---|
| 5101 | initiated by Joel Sommeria on |
|---|
| 5102 | 2002-12-04 </p> |
|---|
| 5103 | |
|---|
| 5104 | |
|---|
| 5105 | |
|---|
| 5106 | |
|---|
| 5107 | <hr> |
|---|
| 5108 | <p style="margin-bottom: 0cm;"><!--Navigation Panel--><img src="/////C-red/BIG_RED/civbin3/UVMAT/nx_grp_g.png" name="Image4" alt="next_inactive" align="bottom" border="0" height="24" width="81"><img src="/////C-red/BIG_RED/civbin3/UVMAT/up_g.png" name="Image5" alt="up" align="bottom" border="0" height="24" width="26"><img src="/////C-red/BIG_RED/civbin3/UVMAT/prev_g.png" name="Image6" alt="previous" align="bottom" border="0" height="24" width="63"><!--End of Navigation Panel--></p> |
|---|
| 5109 | |
|---|
| 5110 | |
|---|
| 5111 | |
|---|
| 5112 | |
|---|
| 5113 | <address>Joel Sommeria 2002-12-04 </address> |
|---|
| 5114 | |
|---|
| 5115 | |
|---|
| 5116 | |
|---|
| 5117 | |
|---|
| 5118 | </body> |
|---|
| 5119 | </html> |
|---|
