mirror of
https://github.com/opencv/opencv.git
synced 2024-11-24 19:20:28 +08:00
58 lines
2.0 KiB
Python
Executable File
58 lines
2.0 KiB
Python
Executable File
#!/usr/bin/python
|
|
# This is a standalone program. Pass an image name as a first parameter of the program.
|
|
|
|
import sys
|
|
from math import sin, cos, sqrt, pi
|
|
import cv2.cv as cv
|
|
import urllib2
|
|
|
|
# toggle between CV_HOUGH_STANDARD and CV_HOUGH_PROBILISTIC
|
|
USE_STANDARD = True
|
|
|
|
if __name__ == "__main__":
|
|
if len(sys.argv) > 1:
|
|
filename = sys.argv[1]
|
|
src = cv.LoadImage(filename, cv.CV_LOAD_IMAGE_GRAYSCALE)
|
|
else:
|
|
url = 'https://code.ros.org/svn/opencv/trunk/opencv/doc/pics/building.jpg'
|
|
filedata = urllib2.urlopen(url).read()
|
|
imagefiledata = cv.CreateMatHeader(1, len(filedata), cv.CV_8UC1)
|
|
cv.SetData(imagefiledata, filedata, len(filedata))
|
|
src = cv.DecodeImageM(imagefiledata, cv.CV_LOAD_IMAGE_GRAYSCALE)
|
|
|
|
|
|
cv.NamedWindow("Source", 1)
|
|
cv.NamedWindow("Hough", 1)
|
|
|
|
while True:
|
|
dst = cv.CreateImage(cv.GetSize(src), 8, 1)
|
|
color_dst = cv.CreateImage(cv.GetSize(src), 8, 3)
|
|
storage = cv.CreateMemStorage(0)
|
|
lines = 0
|
|
cv.Canny(src, dst, 50, 200, 3)
|
|
cv.CvtColor(dst, color_dst, cv.CV_GRAY2BGR)
|
|
|
|
if USE_STANDARD:
|
|
lines = cv.HoughLines2(dst, storage, cv.CV_HOUGH_STANDARD, 1, pi / 180, 100, 0, 0)
|
|
for (rho, theta) in lines[:100]:
|
|
a = cos(theta)
|
|
b = sin(theta)
|
|
x0 = a * rho
|
|
y0 = b * rho
|
|
pt1 = (cv.Round(x0 + 1000*(-b)), cv.Round(y0 + 1000*(a)))
|
|
pt2 = (cv.Round(x0 - 1000*(-b)), cv.Round(y0 - 1000*(a)))
|
|
cv.Line(color_dst, pt1, pt2, cv.RGB(255, 0, 0), 3, 8)
|
|
else:
|
|
lines = cv.HoughLines2(dst, storage, cv.CV_HOUGH_PROBABILISTIC, 1, pi / 180, 50, 50, 10)
|
|
for line in lines:
|
|
cv.Line(color_dst, line[0], line[1], cv.CV_RGB(255, 0, 0), 3, 8)
|
|
|
|
cv.ShowImage("Source", src)
|
|
cv.ShowImage("Hough", color_dst)
|
|
|
|
k = cv.WaitKey(0) % 0x100
|
|
if k == ord(' '):
|
|
USE_STANDARD = not USE_STANDARD
|
|
if k == 27:
|
|
break
|