CANNY_SHIFT       471 modules/imgproc/src/canny.cpp                 #define CANNY_SHIFT 15
CANNY_SHIFT       874 modules/imgproc/src/canny.cpp             #define CANNY_SHIFT 15
CANNY_SHIFT       366 modules/imgproc/src/opencl/canny.cl #undef CANNY_SHIFT