diff --git a/imageviewer-qt4.cpp b/imageviewer-qt4.cpp
index 4fc8c19..be1cd0e 100644
--- a/imageviewer-qt4.cpp
+++ b/imageviewer-qt4.cpp
@@ -108,7 +108,6 @@ void ImageViewer::convertToMonochrome() {
   }
 }
 
-
 /**
  * Draws a simple, black line.
  * @brief ImageViewer::drawBlackLine
@@ -245,7 +244,7 @@ int ImageViewer::getAverageIntensity() {
   for(int i=0; i<256;i++) {
     sumIntensity += (i*grayscale_relative_histogramm[i]);
   }
-  return (int)sumIntensity;
+  return (int) qRound(sumIntensity);
 }
 
 /**
@@ -287,7 +286,7 @@ void ImageViewer::updateHistogramm() {
   histogramm->fill(QColor::fromRgb(200,200,200));
   int black = QColor::fromRgb(0,0,0).rgba();
   for(int x=0; x<256; x++) {
-    int k_max = (int)((100*grayscale_relative_histogramm[x])/max);
+    int k_max = (int) qRound((100*grayscale_relative_histogramm[x])/max);
     for(int y=0; y<k_max; y++) {
       histogramm->setPixel(x, (100-y)-1, black);
     }
@@ -342,7 +341,7 @@ void ImageViewer::adjustContrast(int c) {
     }
   }
   updateImageDisplay();
-  logFile << "[TODO!] Contrast adjusted to: " << old_l << " * " << alpha << " -> (" << h << ", " << s << ", " << new_l << ")" << std::endl;
+  logFile << "Contrast adjusted to: " << old_l << " * " << alpha << " -> (" << h << ", " << s << ", " << new_l << ")" << std::endl;
   renewLogging();
 }