cvCheckChessboard  219 modules/calib3d/include/opencv2/calib3d/calib3d_c.h CVAPI(int) cvCheckChessboard(IplImage* src, CvSize size);
cvCheckChessboard  304 modules/calib3d/src/calibinit.cpp         int check_chessboard_result = cvCheckChessboard(&_img, pattern_size);
cvCheckChessboard  140 modules/calib3d/test/test_chesscorners_timing.cpp         result = cvCheckChessboard(gray, pattern_size);