fixed histogramOp

app/Operations/HistogramOp.cpp

@@ -95,17 +95,10 @@ Image* HistogramOp::equalize( const Image *img ) {
 
 Image *HistogramOp::normalize( const Image *img ) {
 
-    Image* resImg = new Image(img->getWidth(), img->getHeight(), img->getNbChannels());
-
+    Image* resImg = new Image(*img);
     for(unsigned int c = 0; c < img->getNbChannels(); ++c) {
-        Histogram hist_data = img->getHistogram(c);
-        int min=255,max=0;
-        for(int counter=0; counter< 256; counter++ ) {
-            if(hist_data[255-counter]!=0)
-                min=255-counter;
-            if(hist_data[counter]!=0)
-                max=counter;
-        }
+        int min = img->min(c);
+        int max = img->max(c);
         for(unsigned int j = 0; j < img->getHeight(); ++j) {
             for(unsigned int i = 0; i < img->getWidth(); ++i) {
                 double K = img->getPixel(i, j, c);