day5: optim. itseez-academy#1

LemurGarcia · LemurGarcia · commit afb78a6db557 · 2016-02-05T16:30:08.000+03:00
diff --git a/src/convertcolor.cpp b/src/convertcolor.cpp
@@ -67,8 +67,9 @@ void ConvertColor_BGR2GRAY_BT709_fpt(const cv::Mat& src, cv::Mat& dst)
 
         for (int x = 0; x < sz.width; x++)
         {
-            float color = 0.2126 * psrc[x][2-bidx] + 0.7152 * psrc[x][1] + 0.0722 * psrc[x][bidx];
-            pdst[x] = (int)(color + 0.5);
+            short int color = (2126 * psrc[x][2-bidx] + 7152 * psrc[x][1] + 722 * psrc[x][bidx] +5000)/10000;
+
+            pdst[x] = (int)(color);
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -67,8 +67,9 @@ void ConvertColor_BGR2GRAY_BT709_fpt(const cv::Mat& src, cv::Mat& dst)`
`67`	`67`
`68`	`68`	`for (int x = 0; x < sz.width; x++)`
`69`	`69`	`{`
`70`		`- float color = 0.2126 * psrc[x][2-bidx] + 0.7152 * psrc[x][1] + 0.0722 * psrc[x][bidx];`
`71`		`- pdst[x] = (int)(color + 0.5);`
	`70`	`+ short int color = (2126 * psrc[x][2-bidx] + 7152 * psrc[x][1] + 722 * psrc[x][bidx] +5000)/10000;`
	`71`	`+`
	`72`	`+ pdst[x] = (int)(color);`
`72`	`73`	`}`
`73`	`74`	`}`
`74`	`75`	`}`