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)