Added detection of driver positions

OCR_Decode/DriverPositionWindow.cs

@@ -15,7 +15,19 @@ namespace OCR_Decode
         }
         public override object DecodePng()
         {
-            return 0;
+            string result = GetStringFromPng(true);
+            
+            int position;
+            try
+            {
+                position = Convert.ToInt32(result);
+            }
+            catch
+            {
+                position = -1;
+                WindowImage.Save(Reader.DEBUG_DUMP_FOLDER + "FailedPosition"+".png");
+            }
+            return position;
         }
     }
 }

OCR_Decode/Window.cs

@@ -137,10 +137,20 @@ namespace OCR_Decode
             page.Dispose();
             return result;
         }
-        protected string GetStringFromPng()
+        protected string GetStringFromPng(bool onlyDigit = false)
         {
             string result = "";
 
+            if (onlyDigit)
+            {
+                Engine.SetVariable("tessedit_char_whitelist", "0123456789");
+            }
+            else
+            {
+                Engine.SetVariable("tessedit_char_whitelist", "");
+            }
+                
+
             Bitmap rawData = WindowImage;
             Bitmap enhancedImage = new OcrImage(rawData).Enhance();