diff --git a/src/imageanalyzer.py b/src/imageanalyzer.py
--- a/src/imageanalyzer.py
+++ b/src/imageanalyzer.py
@@ -35,7 +35,9 @@ class ImageAnalyzer:
 
 		for y in range(y1,y2+1):
 			for x in range(x1,x2+1):
-				red,green,blue=image.getpixel((x,y))
+				try:
+					red,green,blue=image.getpixel((x,y))
+				except IndexError: continue
 
 				I=(red+green+blue)/255/3
 				m=min(red,green,blue)