diff --git a/script/setup/Layout.py b/script/setup/Layout.py
index bc64da6..eba507e 100644
--- a/script/setup/Layout.py
+++ b/script/setup/Layout.py
@@ -1,4 +1,4 @@
-BLOCK_ROI_TOLERANCE = 30 #mm
+BLOCK_ROI_TOLERANCE = 10 #mm
 LED_TOLERANCE = 8 #mm Distance between LEDs = 18mm
 
 puck_layout = (
@@ -80,6 +80,8 @@ class Block:
         self.angle_range = angle_range
         self.x_range = x_range
         self.y_range = y_range
+        self.roi = (self.x_range[0] - BLOCK_ROI_TOLERANCE, self.y_range[0] - BLOCK_ROI_TOLERANCE, 
+                    self.x_range[1] + BLOCK_ROI_TOLERANCE, self.y_range[1] + BLOCK_ROI_TOLERANCE)
 
     def __str__(self):
         return "Id: " + str(self.id) + "\nAngle: " + str(self.angle_range) + "\nX: " + str(self.x_range) + "\nY: " + str(self.y_range)