stereoCalibrate() changes focal lengths even when it was not supposed to

Question

I noticed that opencv stereoCalibrate() changes the focal lengths in camera matrices even though I\'ve set appropriate flag (ie CV_CALIB_FIX_FOCAL_LENGTH). I\'m using two identi

Answer 1

the CV_CALIB_FIX_FOCAL_LENGTH flag causes the optimization routine to just use the Fx and Fy that were passed in the intrinsic matrix.