Calibration using OpenCV :

https://learnopencv.com/camera-calibration-using-

//docs.opencv.org/3.4/dc/dbb/tutorial_py_calibration.html

https://sourishghosh.com/2016/camera-calibration-cpp-opencv/

Nvidia :

https://docs.nvidia.com/drive/driveworks-3.5/dwx_camera_calibration.html