To perform camera calibration as we discussed earlier, we must obtain corresponding 2D-3D point pairings. With ArUco marker detection, this task is made simple. ArUco provides a tool to create a calibration board, a grid of squares and AR markers, in which all the parameters are known: number, size, and position of markers. We can print such a board with our home or office printer, with the image for printing supplied by the ArUco API:
Ptr<aruco::Dictionary> dict = aruco::Dictionary::get(aruco::DICT_ARUCO_ORIGINAL);Ptr<aruco::GridBoard> board = aruco::GridBoard::create( 10 /* N markers x */, 7 /* M markers y */, 14.0f /* marker width (mm) */, 9.2f /* marker separation (mm) */, dict);Mat boardImage;board->draw({1000, ...
