diff --git a/script/camtool.py b/script/camtool.py
index f84d981..cc74a8b 100644
--- a/script/camtool.py
+++ b/script/camtool.py
@@ -7,8 +7,8 @@ class CamToolImage(ReadableMatrix):
     def __init__(self, camtool):
         self.camtool = camtool
         shape = camtool.cam_shape.read()
-        self.width = shape[1] #len(camtool.profile_x.read())  
-        self.height = shape[0] #len(camtool.(profile_y.read())  
+        self._width = shape[1] #len(camtool.profile_x.read())  
+        self._height = shape[0] #len(camtool.(profile_y.read())  
         
     def read(self):                
         raw = self.camtool.cam_data.read()
@@ -16,10 +16,10 @@ class CamToolImage(ReadableMatrix):
         #return mono_to_bidi(raw, self.getWidth(), self.getHeight())
 
     def getWidth(self):
-        return self.width
+        return self._width
 
     def getHeight(self):
-        return self.height
+        return self._height