Changes between Version 11 and Version 12 of Tutorial/GeometricCalibration


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Timestamp:
Sep 19, 2013, 5:53:47 PM (7 years ago)
Author:
g7moreau
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  • Tutorial/GeometricCalibration

    v11 v12  
    11[[TracNav(Tutorial/TOC)]]
    2 = Tutorial / Simple scaling =
     2= [wiki:Tutorial] / Geometric calibration =
     3
     4== Simple scaling ==
    35
    46Open again a test image in 'UVMAT_DEMO01_pair'.(accessible on http://servforge.legi.grenoble-inp.fr/pub/soft-uvmat/)
     
    1820'images.ref.xml' put for reference).
    1921
    20 = translating the coordinates =
     22
     23== Translating the coordinates ==
     24
    2125The origin of the phys coordiantes is now arbitrary. It is more convenient to have it for instance at the centre of the cylinder, now at (x,y)=(1.69, 4.05).
    2226
     
    2529To shift the coordinates, activate in geometry_calib the menu bar command Tools/Translate points, and fills  (x=-1.69, y=-4.05) in the edit box which pops up. the phys coordinates of the calibration points are then shifted, and a new calibration put the cylindre centre at the origin (0,0).
    2630
    27 = Calibration with reference points =
     31
     32== Calibration with reference points ==
    2833
    2934An alternative method of calibration consists of using a set of reference points whose physical coordinates are known. Open with '''uvmat''' an image in 'UVMAT_DEMO06_PIVconvection/Dalsa1' (accessible on http://servforge.legi.grenoble-inp.fr/pub/soft-uvmat/)