CHESSBOARD         78 modules/calib3d/test/test_chesscorners.cpp enum Pattern { CHESSBOARD, CIRCLES_GRID, ASYMMETRIC_CIRCLES_GRID };
CHESSBOARD         83 samples/cpp/calibration.cpp enum Pattern { CHESSBOARD, CIRCLES_GRID, ASYMMETRIC_CIRCLES_GRID };
CHESSBOARD         32 samples/cpp/tutorial_code/calib3d/camera_calibration/camera_calibration.cpp     enum Pattern { NOT_EXISTING, CHESSBOARD, CIRCLES_GRID, ASYMMETRIC_CIRCLES_GRID };