diff --git a/exp/hough.py b/exp/hough.py
--- a/exp/hough.py
+++ b/exp/hough.py
@@ -3,6 +3,7 @@ sys.path.append("../src")
 
 import math
 from datetime import datetime
+import os.path
 import logging as log
 
 import numpy as np
@@ -10,6 +11,7 @@ import scipy.optimize
 import scipy.signal
 import cv2 as cv
 
+import config as cfg
 from geometry import EPoint,Line
 
 DEBUG=True
@@ -167,9 +169,15 @@ class HoughTransform:
 
 
 def show(img,filename="x"):
-	cv.imshow(filename,img)
-	cv.waitKey(0)
-	cv.destroyAllWindows()
+	if cfg.INTERACTIVE:
+		cv.imshow(filename,img)
+		cv.waitKey(0)
+		cv.destroyAllWindows()
+	else:
+		d=int(datetime.now().timestamp())
+		path=os.path.join(cfg.imgDir,"{0} {1:03} {2}.png".format(d,cfg.i,filename))
+		cfg.i+=1
+		cv.imwrite(path,img)
 
 
 def filterVert(edges):