[TASK] Add comment to calcIntensity()

2015-11-10 12:56:39 +01:00 · 2015-11-10 12:56:39 +01:00 · 8e3070a4b4
commit 8e3070a4b4
parent 3fe80df7f9
1 changed files with 6 additions and 0 deletions
--- a/imageviewer-qt4.cpp
+++ b/imageviewer-qt4.cpp
@ -73,6 +73,12 @@ void ImageViewer::initializeImage() {
  analyzeImage();
 }

+/**
+ * Uses simple weights to calculate intensity of a pixel.
+ * Using qRound() to reduce the error of the int cast.
+ * 
+ * @brief ImageViewer::calcIntensity
+ */
 int ImageViewer::calcIntensity(int r, int g, int b) {
  return (int) qRound(0.299*r + 0.587*g + 0.114*b);
 }