prepareDistCoeffs 3224 modules/calib3d/src/calibration.cpp     distCoeffs = prepareDistCoeffs(distCoeffs, rtype);
prepareDistCoeffs 3298 modules/calib3d/src/calibration.cpp     distCoeffs1 = prepareDistCoeffs(distCoeffs1, rtype);
prepareDistCoeffs 3299 modules/calib3d/src/calibration.cpp     distCoeffs2 = prepareDistCoeffs(distCoeffs2, rtype);