1.28. Is it possible to obtain the internal parameters and distortion correction coefficients used during camera calibration from the camera?#
No.
The camera’s internal parameters (\(f\), \(Cx\), \(Cy\)) and distortion correction coefficients (\(k_1\), \(k_2\), \(k_3\), \(p_1\), \(p_2\)) are not recorded inside the camera, so these parameters cannot be obtained. (The camera’s internal distortion correction function is simple and not sutable for precision applications such as 3D projection.)
You will need to calculate these parameters using software and a checkerboard, etc.