[[TracNav(Tutorial/TOC)]] = [wiki:Tutorial] / Advanced Particle Imaging Velocimetry = This example illustrates advanced procedures for particle Image Velocimetry (PIV), see [https://servforge.legi.grenoble-inp.fr/projects/soft-uvmat/wiki/Tutorial/ParticleImageVelocimetry#TutorialParticleImageVelocimetry: TutorialParticleImageVelocimetry] for a first introduction to PIV. == Visual check == Launch the GUI '''uvmat''' and open an image in ''UVMAT_DEMO03_PIVchallenge_2005C/images'' , which represents a jet (images from PIV challenge, ref...). Images are organized in pairs, denoted with labels a, b with a short time interval  Dt=0.01 ms, with interval 2 ms between two successive pairs. The timing and geometric calibration has been provided in the xml file images.xml, in the same way as discussed in section .. for a single pair. check the image pair between a and b, then between 1 and 2, dt is displayed while the time is displayed in the upper right edit box. '''Civ:''' import the parameters stored in ... small displacement of the order of 1 pixel, so small search box. Check filter, compare filter2 and civ2, make transverse cut... '''merge proj: ''' define a physical grid for the final results, select (U,V0 and curl , div, use '''[!ProjMode]''' =interp_tps launch merge_proj: results are obtained as 2D matrices, open with uvmat. Select U in get_field. No info left on the PIV process after projection. This is the start for the scientific analysis. '''time_series:''' '''turb_stat:'''