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Fixed the bug in the example given #277

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Fixed the bug in the example given #277

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6 changes: 4 additions & 2 deletions source/py_tutorials/py_imgproc/py_houghlines/py_houghlines.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -56,7 +56,8 @@ Everything explained above is encapsulated in the OpenCV function, **cv2.HoughLi
edges = cv2.Canny(gray,50,150,apertureSize = 3)

lines = cv2.HoughLines(edges,1,np.pi/180,200)
for rho,theta in lines[0]:
for line in lines:
rho, theta = line[0]
a = np.cos(theta)
b = np.sin(theta)
x0 = a*rho
Expand Down Expand Up @@ -101,7 +102,8 @@ Best thing is that, it directly returns the two endpoints of lines. In previous
minLineLength = 100
maxLineGap = 10
lines = cv2.HoughLinesP(edges,1,np.pi/180,100,minLineLength,maxLineGap)
for x1,y1,x2,y2 in lines[0]:
for line in lines:
x1,y1,x2,y2 = line[0]
cv2.line(img,(x1,y1),(x2,y2),(0,255,0),2)

cv2.imwrite('houghlines5.jpg',img)
Expand Down