I adopted ARToolKit DirectShow2.52 in my research.
By the way, I found that the camera-captured image of a real cube is slightly different from an OpenGL-generated virtual cube in the aspect of perspective projection. I think it is caused by different view angle value between USB camera and ARtoolKit.
I am trying to calibrate camera parameters with calib_camera2.exe now.
But, the results of calibrations are not consistent.
Itís a very difficult job.
Is there any detailed document about calibration?
I am looking forward to hearing from you.
Thank you so much.