Merge pull request #1 from syrusakbary/patch-1

Updated gray algorithm
ern0 · Apr 13, 2022 · a7c5594 · a7c5594
2 parents 601a222 + 69e09a9
commit a7c5594
Showing 1 changed file with 5 additions and 6 deletions.
diff --git a/inc.cpp b/inc.cpp
@@ -28,11 +28,10 @@ extern "C" void gray(int width, int height) {
 	uint8_t* ptr = &memory;
 	for (int i = 0; i < width * height * 4; i += 4) {
 
-		uint32_t sum = ptr[i] + ptr[i+1] + ptr[i+2];
-		uint32_t avg = sum / 3;
-		ptr[i] = avg;
-		ptr[i+1] = avg;
-		ptr[i+2] = avg;
+		uint32_t gray = 0.299 * ptr[i] + 0.587 * ptr[i+1] + 0.114 * ptr[i+2];
+		ptr[i] = gray;
+		ptr[i+1] = gray;
+		ptr[i+2] = gray;
 
 	}
 }
@@ -134,4 +133,4 @@ extern "C" void blur(int width, int height) {
 
 		}
 	}
-}
+}