diff --git a/exp/hough.py b/exp/hough.py
--- a/exp/hough.py
+++ b/exp/hough.py
@@ -10,6 +10,8 @@ import scipy.optimize
 import scipy.signal
 import cv2 as cv
 
+from geometry import EPoint,Line
+
 DEBUG=True
 
 
@@ -45,15 +47,25 @@ class HoughTransform:
 	def extract(self):
 		img=self._createImg()
 		self.show(img)
-		(ab,cd)=self._detectLines()
+		lines=self._detectLines()
+		res=[]
 		i=0
-		for (score,alpha,beta,peaks) in (ab,cd):
+		for (score,alpha,beta,peaks) in lines:
 			log.debug("score: %s",score)
 			log.debug("alpha, beta: %s, %s",alpha,beta)
 			self._drawLine(img,alpha,beta,peaks,i)
+
+			keys=self._readLineKeys(alpha,beta)
+			for k in peaks:
+				(alphaDeg,d)=keys[k]
+				alphaRad=alphaDeg*math.pi/180
+				baseLine=Line(alphaRad,0)
+				dd=baseLine.distanceTo(EPoint(*self._center)) # to shift d from the center to 0,0
+				res.append(Line(alphaRad, dd+d-self._diagLen//2))
 			i+=1
 
 		self.show(img)
+		return res
 
 	def update(self,img,weight=1):
 		start=datetime.now().timestamp()