diff --git a/config/settings.properties b/config/settings.properties
index 3271b06..16bb961 100644
--- a/config/settings.properties
+++ b/config/settings.properties
@@ -1,4 +1,4 @@
-#Wed Jul 31 16:57:45 CEST 2019
+#Wed Jul 31 17:19:22 CEST 2019
 count_time=1.0
 geometry=fourcv
 roi=173 88 285 136
diff --git a/script/device/Image.py b/script/device/Image.py
index 8aa14a4..6ae1a52 100644
--- a/script/device/Image.py
+++ b/script/device/Image.py
@@ -8,19 +8,10 @@ class ImageIntensity(DeviceBase, Readable):
         self.setParent(image)
 
     def read(self):
-        global AUTO_THRESH1_COUNT, AUTO_THRESH2_COUNT, AUTO_THRESH3_COUNT, AUTO_THRESH4_COUNT
+        p=self.getParent()
         ret = self.getParent().read()        
         if ret is not None:            
-            (I_sum, area_I, thresh1_count, thresh2_count, thresh3_count, thresh4_count, I_sum_bgr, area_bgr) = ret
-            AUTO_THRESH1_COUNT=thresh1_count
-            AUTO_THRESH2_COUNT=thresh2_count
-            AUTO_THRESH3_COUNT=thresh3_count
-            AUTO_THRESH4_COUNT=thresh4_count          
-            AUTO_THRESH1 =  self.getParent().pixel.threshold1
-            AUTO_THRESH2 =  self.getParent().pixel.threshold2
-            AUTO_THRESH3 =  self.getParent().pixel.threshold3
-            AUTO_THRESH4 =  self.getParent().pixel.threshold4                          
-            
+            (I_sum, area_I, thresh1_count, thresh2_count, thresh3_count, thresh4_count, I_sum_bgr, area_bgr) = ret            
             ret = I_sum
             #if area_bgr > 0:
             #    ret = ret - ((I_sum_bgr / area_bgr) * area_I)    
@@ -75,6 +66,7 @@ class Image(DeviceBase, Readable):
         self.last_filename = None
         self.last_image = None
         self.image_lock = threading.Lock()
+        self.I_sum, self.area_I, self.thresh1_count, self.thresh2_count, self.thresh3_count, self.thresh4_count, self.I_sum_bgr, self.area_bgr = None,None,None,None,None,None,None,None
 
     
     def get_int(self, filename = None):        
@@ -101,8 +93,10 @@ class Image(DeviceBase, Readable):
             ret = img_get_int(tmp_file, threshold1, threshold2, threshold3, threshold4, \
                           self.pixel.image_header_length, self.pixel.PIX_XDIM, self.pixel.PIX_YDIM,self.pixel.PIX_COLOR_DEPTH, \
                           roi[0], roi[1], roi[2], roi[3], bkroi[0], bkroi[1], bkroi[2], bkroi[3])
+            self.I_sum, self.area_I, self.thresh1_count, self.thresh2_count, self.thresh3_count, self.thresh4_count, self.I_sum_bgr, self.area_bgr = ret
         except:
             log("Error calculating intensity: " + str(filename) + " - " + str(sys.exc_info()[1]), False)
+            self.I_sum, self.area_I, self.thresh1_count, self.thresh2_count, self.thresh3_count, self.thresh4_count, self.I_sum_bgr, self.area_bgr = None,None,None,None,None,None,None,None
             ret = None                                                
         self.setCache(ret, None)
         return ret
@@ -134,6 +128,7 @@ class Image(DeviceBase, Readable):
             return ret
         finally:
             self.image_lock.release()
+            
     def read(self):
         return self.get_int()