Camera Calibration Chessboard

This is a 10 by 7 25 mm chessboard for camera calibration, it is quite useful for Python's OpenCV libraries and matlab calibration app, as well as many other useful codes. I printed the calibration pattern in PETG in case the measurements may be done outdoors. I highly recommend using a smooth plate to achieve the most accurate result with lesser noise than textured usual plate. Please feel free to edit the model and upload more improvemente ideas.