Add -ws flag for cornerSubPix params (backported from 4.x). Add flags to set the camera intrinsic parameters as an initial guess (can allow converging to the correct camera intrinsic parameters). Add -imshow-scale flag to resize the image when displaying the results. Add -enable-k3 flag to enable or disable the estimation of the K3 distortion coefficient.
Add -ws flag for cornerSubPix params (backported from 4.x).
Add flags to set the camera intrinsic parameters as an initial guess (can allow converging to the correct camera intrinsic parameters).
Add -imshow-scale flag to resize the image when displaying the results.
Add -enable-k3 flag to enable or disable the estimation of the K3 distortion coefficient.

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