CV_CALC_MIN_8U   4165 modules/imgproc/src/color.cpp             CV_CALC_MIN_8U( vmin, g );
CV_CALC_MIN_8U   4166 modules/imgproc/src/color.cpp             CV_CALC_MIN_8U( vmin, r );
CV_CALC_MIN_8U    655 modules/imgproc/src/distransform.cpp         dbase[x] = (uchar)(CV_CALC_MIN_8U(a, dbase[x]));