how to use the DLTCalibrator about cv2cg

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Hi, Thanks for pointing out this. Actually there is a little bug in the source 
file and I fixed it. Now it should work well. Please check out the newest 
version from mercurial. Thanks!

Original comment by simba.forrest on 11 Feb 2011 at 9:40

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A. For sample data, you may look at the "data" folder, and use the 
"draw.txt.out0.cp" as the input file for DLTCalibrator app, and it's correct 
output is "draw.txt.out0.par" file. (please note that DLTCalibrator will 
automatically rewrite the draw.txt.out0.par file, so before you do this, please 
rename the 'par' file and then compare the output you get.)

B. For the coordinate system, I think I might have mentioned in the comment of 
source file, it is the standard computer vision manner, i.e.:
1. for image coordinate system:
   origin: up-left corner of the image
   x-axis: from up-left to up-right corner
   y-axis: from up-left to bottom-left corner
   unit  : pixel (also the unit for focal length)
2. for camera coordinate system:
   origin: camera center
   x-axis: parallel to x-axis of image coordinate system(with the same direction)
   y-axis: parallel to y-axis of image coordinate system(with the same direction)
   z-axis: point from the origin to the scene which the camera is facing at, i.e., right-hand system with x-axis and y-axis
   unit  : whatever unit you want with your application(which will also be the unit of camera center/translation getting from the DLTCalibration.)

C. For limitation of DLT calibration, yes, no planar structure is allowed, and 
nearly planar setup will also make the equations very unstable. If it has to be 
planar structure, you should try Zhang Zhengyou's calibration method, which is 
also given in OpenCV's example "Calibration.exe"

Thanks again!

Original comment by simba.forrest on 11 Feb 2011 at 9:57