Changes between Version 3 and Version 4 of Tutorial/AdvancedParticleImagingVelocimetry2

Timestamp:

Aug 27, 2013, 12:42:41 AM (11 years ago)

Author:

sommeria

Comment:

--

Tutorial/AdvancedParticleImagingVelocimetry2

@@ -13 +13 @@
 = making two masks =
 The parietal jet requires a very good resolution, particularly among x. To limitate PIV to this jet, let us create a specific mask.
-Open the previously created contour polygon contour_mask.xml in uvmat  by the menu bar '''!Tools/Projection object/browse...'''. Check '''edit''' (tag '''[!CheckEditObject]''').
-check the box '''edit''' (tag '''[!CheckEditObject]''') in the frame '''Object''' of uvmat (right hand side) to allow editing of the polygon. then replace the lower x bound 0 by 52. Then create the corresponding mask by '''Tools/make mask''', save it with name Dalsa1.mask/mask_plume.png. Similarly create a mask for the bulk Dalsa1.mask/mask_bulk.png, with bounds in x [0 55].
+Open the previously created contour polygon contour_mask.xml in uvmat  by the menu bar '''!Tools/Projection object/browse...'''. Check the box '''edit''' (tag '''[!CheckEditObject]''') in the frame '''Object''' of uvmat (right hand side) to allow editing of the polygon. then replace the lower x bound 0 by 52. Then create the corresponding mask by '''Tools/make mask''', save it with name Dalsa1.mask/mask_plume.png. Similarly create a mask for the bulk Dalsa1.mask/mask_bulk.png, with bounds in x [0 55].
   
 = PIV on the parietal plume =
+Choose the following parameters:
+pair j=1-2 for Civ1 and Civ2 : it minimises the time interval which is needed to cpature the large velocity in the plume.
+CorrBox x,y=(5 31) which optimizes the resolution in x (5 pixels)
+Search x, y=(25 55) which allows for a larger velocity component along y .
+auto-grid Dx=2, Dy=10, consistent with CoorBox (about half the box size).
+Mask selected, with name .../Dalsa1.mask/mask_plume.png .
+For Civ2, same parameters CorrBox, auto-grid and Mask.
+For patch and Fix, default parameters.
 
 = PIV on the interior =