diff --git a/exp/hough.py b/exp/hough.py
--- a/exp/hough.py
+++ b/exp/hough.py
@@ -115,8 +115,8 @@ class HoughTransform:
 
 	def _detectLines(self):
 		bag=LineBag()
-		for alpha in range(0,180,3):
-			for beta in range(min(alpha-60,0),alpha+60,3):
+		for alpha in range(0,180,2):
+			for beta in range(max(alpha-60,0),alpha+60,2):
 				accLine=[self._acc[key] for key in self._readLineKeys(alpha,beta)]
 				(peaks,props)=scipy.signal.find_peaks(accLine,prominence=0)
 				(prominences,peaks)=zip(*sorted(zip(props["prominences"],peaks),reverse=True)[:19])