use calibrate.py for picam camera or any other camera calibration image path needs to modified in calibrate.py name for saved calibration matrices can be set in start of script
calibrate_cam_mp.py is same but uses multiprocessing for image loading but has no visualization of detected markers
default set of images for calibration are located in /data/DataBox/Data_New/forklift/calibration_marker/picam_calib/images_1640_1232_C95