refactored from ccalib module of opencv-contrib. and is a hundred times faster.

capable of calibrate multicamera from any pattern especially ChessBoard pattern.

support "Multicamera rig calibration by double-sided thick checkerboard" :

support calibrate double-side pattern itself

support calibrate multicamera with double-side pattern

prerequist:

opencv4.x

eigen3.x c++17 compiler demo:

(double side not working)