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= [wiki:Tutorial] / Projection objects =
Projection objects are used in various ways for image or field analysis, as shown in the following examples. Let us choose now a color image as input, UVMAT_DEMO02_color/images/frame1.jpg' (the folder 'UVMAT_DEMO02_color' is accessible on http://servforge.legi.grenoble-inp.fr/pub/soft-uvmat/).

== Plotting a luminosity profile ==
Create a line by the menu bar command ''''Projection Object/line''''. A new GUI '''set_object''' appears on the right side, with default settings '''Type'''='line', '''!ProjMode'''='projection'. Draw a line with the mouse, left hande side button to mark the beginning and end of the line. The luminosity profile, with the three rgb image components, appears in a new GUI ''''view_field''''. The line can be moved with the mouse, or by directly introducing the coordinates of the line in the table '''[Coord]''' of the GUI '''set_object'''.

== Getting the image histogram in a sub-region ==
== Resampling the image ==