diff --git a/script/device/Image.py b/script/device/Image.py
index 10798fc..8aa14a4 100644
--- a/script/device/Image.py
+++ b/script/device/Image.py
@@ -16,10 +16,10 @@ class ImageIntensity(DeviceBase, Readable):
             AUTO_THRESH2_COUNT=thresh2_count
             AUTO_THRESH3_COUNT=thresh3_count
             AUTO_THRESH4_COUNT=thresh4_count          
-            AUTO_THRESH1 = self.pixel.threshold1
-            AUTO_THRESH2 = self.pixel.threshold2
-            AUTO_THRESH3 = self.pixel.threshold3
-            AUTO_THRESH4 = self.pixel.threshold4                          
+            AUTO_THRESH1 =  self.getParent().pixel.threshold1
+            AUTO_THRESH2 =  self.getParent().pixel.threshold2
+            AUTO_THRESH3 =  self.getParent().pixel.threshold3
+            AUTO_THRESH4 =  self.getParent().pixel.threshold4                          
             
             ret = I_sum
             #if area_bgr > 0: