diff --git a/rawimage.cpp b/rawimage.cpp
index 88028ad..9a5031d 100644
--- a/rawimage.cpp
+++ b/rawimage.cpp
@@ -146,6 +146,7 @@ void RawImage::calcStats()
             break;
         }
     }
+    if(img.type() == CV_32F)m_median /= histSize;
     cv::Mat absDev;
     img.convertTo(absDev, CV_32F, 1, -m_median);
     absDev = cv::abs(absDev);
@@ -161,6 +162,7 @@ void RawImage::calcStats()
             break;
         }
     }
+    if(img.type() == CV_32F)m_mad /= histSize;
 }
 
 void RawImage::rect(int &x, int &y, int w, int h, std::vector<double> &r) const