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2013-01-21 13:45:20 -0600 | asked a question | Calibrating Blender Camera as test I am trying to use opencv with python to calibrate a camera. I am doing initial tests to try to confirm I am doing it right. I used Blender 3d to animate a chessboard moving so that I could check the intrinsic matrix I got with my blender setup. I loaded individual frames from the animation and used cv.FindChessboardCorners to find the corners. However, I am a little confused how to check my answer.Using cv.CalibrateCamera2, I got this intrinsic matrix: The center coordinates (960,536) make sense because the resolution of my picture is (1920,1080)but I do not know know how to interpret the 5.98555703e+04 and 6.18404531e+04 values. In blender, the camera's focal length is 35mm. Can I use this information to check these two values? I know the values for row 1 col 1 and row 2 col 2 depend on focal length but I did not understand any of the explanations I found on the web. Also, the values for the distortion coefficients (k1,k2,p1,p2,k3) are: Is this high or low? Blender's camera should not have a lot of distortion. I really appreciate any help I can get! Thanks |