cv:threshold optimization for Tegra

modules/imgproc/src/precomp.hpp

@@ -63,6 +63,10 @@
 #include <limits.h>
 #include <float.h>
 
+#ifdef HAVE_TEGRA_OPTIMIZATION
+#include "opencv2/imgproc/imgproc_tegra.hpp"
+#endif
+
 /* helper tables */
 extern const uchar icvSaturate8u_cv[];
 #define CV_FAST_CAST_8U(t)  (assert(-256 <= (t) || (t) <= 512), icvSaturate8u_cv[(t)+256])

modules/imgproc/src/thresh.cpp

@@ -58,7 +58,16 @@ thresh_8u( const Mat& _src, Mat& _dst, uchar thresh, uchar maxval, int type )
         roi.width *= roi.height;
         roi.height = 1;
     }
-    
+
+#ifdef HAVE_TEGRA_OPTIMIZATION
+#warning "TEGRA OPTIMIZED BINARY THRESHOLD (maxval == 255)"
+    if (type == THRESH_BINARY && maxval == 255)
+    {
+	if(tegra::thresh_8u_binary_256(_src, _dst, roi, thresh))
+            return;
+    }
+#endif
+  
     switch( type )
     {
     case THRESH_BINARY: