Changes between Version 22 and Version 23 of Tutorial/CorrelationImageVelocimetryOptimisation


Ignore:
Timestamp:
Jan 28, 2015, 8:25:03 PM (6 years ago)
Author:
sommeria
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • Tutorial/CorrelationImageVelocimetryOptimisation

    v22 v23  
    6262
    6363== Another Example ==
    64 With the GUI uvmat open an image in ''/UVMAT_DEMO04_PIVchallenge_2001A/images'' taken from PIV challenge (ref web site  **). A short description of the experimental conditions is given in the file ''readme.txt'' in the folder of the images. It is said that the field of view is 170 x140 mm, so that, since the image size is 1280x1024 px, the scale is 7.4 px/cm. but no time Dt **. The flow is the vortex behind a wing with poor particle seeding in the core. 
     64With the GUI uvmat open an image in ''/UVMAT_DEMO04_PIVchallenge_2001A/images'' taken from PIV challenge (ref web site  **). A short description of the experimental conditions is given in the file ''readme.txt'' in the folder of the images. It is said that the field of view is 170 x140 mm, so that, since the image size is 1280x1024 px, the scale is 7.4 px/cm. but no time Dt **. The flow is the vortex behind a wing with poor particle seeding in the core.
    6565
    66 From uvmat select Run/PIV so the GUI civ_input pops up. With the option''' [wiki:ImportParam [!ImportParam]]''', import the parameters from the file ''Images.ref.civ/0_XML/A_1_1.xml'' and run the civ calculation. The result should look like the reference result ''Image.ref.civ_2/A_1_1-2.nc''. As expected form the dark spot at the vortex centre, the core is not properly resolved in civ1. The result is improved in civ2. 
     66From uvmat select Run/PIV so the GUI civ_input pops up. With the option''' [wiki:ImportParam [!ImportParam]]''', import the parameters from the file ''Images.ref.civ/0_XML/A_1_1.xml'' and run the civ calculation. The result should look like the reference result ''Image.ref.civ_2/A_1_1-2.nc''. As expected form the dark spot at the vortex centre, the core is not properly resolved in civ1. The result is improved in civ2.
    6767
    68 Let us improve again the result by a third civ iteration. This is launched in the GUI '''series/civ_series''', opening  the netcdf file result of the previous civ2 calculation instead of an image. The source image then automatically appears in the second line of the input table of '''series'''. ''''
     68Let us improve again the result by a third civ iteration. This is launched in the GUI '''series/civ_series''', opening  the netcdf file result of the previous civ2 calculation instead of an image. The source image then automatically appears in the second line of the input table of '''series'''. Unselect the option Civ1, Fix1 and Patch1, and select the check box Civ3 in the frame Civ2.''' '''Then run the civ calculation, with result in a new folder'' Images.civ_1''. The final result is shown in the figure below, with a cut across the vortex core at y=500 pixel.
     69
     70figure**''''''