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Camera calibration error using zhang's method

wangjihang88
Beginner
‎11-15-2010 05:36 PM
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Hi,

I am now using the openCv function's to do the Camera calibration. But all the distortion coefficient parameters are incorrect especially the radius distortion. k2 and k3 often be the value greater than1 while the focal length and principal point seem correct. I cannot explain the reason and Does anyone know the reason and help me to solve this problem?

The parameters below is my intrinsic parameters in one experiment under the windows size is (640*480),using 8-by-8 chessboard, the square size is 2 centimeter and all the chessboard corners can be found correctly.

k1=0.0796868 , k2=1.64119 , k3= -38.8437, p1=-0.00536427 , p2=-0.00200758

principal point: 231.794 , 252.236

focal length: 1062.22, 1055.18

Thanks,

Jihang

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Vladimir_Dudnik
Employee
‎11-16-2010 03:28 AM
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Hello,

I would recommend you ask OpenCV related questions on OpenCV forum. Intel Integrated Performance Primitives forum dedicated for IPP related topics.

Regards,
Vladimir
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