MATLAB Camera Calibration with a Checkerboard: Board Size, the Even/Odd Rule, and the Calibrator App
MATLAB’s Camera Calibrator app calibrates from a checkerboard, but it is stricter than OpenCV: it needs a board with an even number of squares on one edge and an odd number on the other, which produces two black and two white corners so the app can fix orientation and origin. Board size is counted in squares (points are the interior corners), plus the detectCheckerboardPoints / generateCheckerboardPoints / estimateCameraParameters workflow, stereo and fisheye, and why the target sets the accuracy ceiling.