CV_FAST_CAST_8U   105 modules/core/src/precomp.hpp #define CV_FAST_CAST_8U(t)   (assert(-256 <= (t) && (t) <= 512), cv::g_Saturate8u[(t)+256])
CV_FAST_CAST_8U    69 modules/imgproc/src/precomp.hpp #define CV_FAST_CAST_8U(t)  (assert(-256 <= (t) && (t) <= 512), icvSaturate8u_cv[(t)+256])