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Merge pull request #3722 from berak:py_houghlines_sample

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Vadim Pisarevsky
2015-03-03 18:16:25 +00:00
parent 4701b22e14 c83044d45a
commit c9ea878d10
2 changed files with 24 additions and 22 deletions
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34
samples/python2/houghlines.py
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@@ -18,23 +18,25 @@ src = cv2.imread(fn)
dst = cv2.Canny(src, 50, 200)
cdst = cv2.cvtColor(dst, cv2.COLOR_GRAY2BGR)
# HoughLines()
# lines = cv2.HoughLines(dst, 1, math.pi/180.0, 50, np.array([]), 0, 0)
# a,b,c = lines.shape
# for i in range(b):
# rho = lines[0][i][0]
# theta = lines[0][i][1]
# a = math.cos(theta)
# b = math.sin(theta)
# x0, y0 = a*rho, b*rho
# pt1 = ( int(x0+1000*(-b)), int(y0+1000*(a)) )
# pt2 = ( int(x0-1000*(-b)), int(y0-1000*(a)) )
# cv2.line(cdst, pt1, pt2, (0, 0, 255), 3, cv2.LINE_AA)
if True: # HoughLinesP
lines = cv2.HoughLinesP(dst, 1, math.pi/180.0, 40, np.array([]), 50, 10)
a,b,c = lines.shape
for i in range(a):
cv2.line(cdst, (lines[i][0][0], lines[i][0][1]), (lines[i][0][2], lines[i][0][3]), (0, 0, 255), 3, cv2.LINE_AA)
else: # HoughLines
lines = cv2.HoughLines(dst, 1, math.pi/180.0, 50, np.array([]), 0, 0)
a,b,c = lines.shape
for i in range(a):
rho = lines[i][0][0]
theta = lines[i][0][1]
a = math.cos(theta)
b = math.sin(theta)
x0, y0 = a*rho, b*rho
pt1 = ( int(x0+1000*(-b)), int(y0+1000*(a)) )
pt2 = ( int(x0-1000*(-b)), int(y0-1000*(a)) )
cv2.line(cdst, pt1, pt2, (0, 0, 255), 3, cv2.LINE_AA)
lines = cv2.HoughLinesP(dst, 1, math.pi/180.0, 50, np.array([]), 50, 10)
a,b,c = lines.shape
for i in range(b):
cv2.line(cdst, (lines[0][i][0], lines[0][i][1]), (lines[0][i][2], lines[0][i][3]), (0, 0, 255), 3, cv2.LINE_AA)
cv2.imshow("source", src)
cv2.imshow("detected lines", cdst)