diff --git a/MarketData/MarketDataLib/CNNProcessing/ImageHelper.cs b/MarketData/MarketDataLib/CNNProcessing/ImageHelper.cs
index 7329b0b..e33ab26 100644
--- a/MarketData/MarketDataLib/CNNProcessing/ImageHelper.cs
+++ b/MarketData/MarketDataLib/CNNProcessing/ImageHelper.cs
@@ -18,7 +18,7 @@ namespace MarketData.CNNProcessing
       public ImageHelper(ImageHelper imageHelper)
       {
         this.bitmap=Copy(imageHelper.bitmap);
-        pointMapping = new PointMapping(Width,Height,Width,0,Height,0);
+        pointMapping = new PointMapping(Width,Height,Width-1,0,Height-1,0);
       }    
 
       public void Dispose()