Add comments

MarketDataLib/CNNProcessing/ImageHelper.cs

@@ -153,6 +153,8 @@ namespace MarketData.CNNProcessing
       Validate();
       graphics=Graphics.FromImage(bitmap);
     }
+
+    // This is the method that is currently being used in the CNNClient.Predict to send the image stream to Flask
 		public Stream SaveBlackAndWhiteJPG()
 		{
 			Validate();