image_processing -> canny edge

sample code 如下:


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import sys
sys.path.append('/usr/local/lib/python2.7/site-packages')


import cv2
import numpy as np
from matplotlib import pyplot as plt

img = cv2.imread('../bg.jpg',0)
#     Canny(frame_buf, min_thr, max_thr)
edges = cv2.Canny(img,100,200)

plt.subplot(121),plt.imshow(img,cmap = 'gray')
plt.title('Original Image'), plt.xticks([]), plt.yticks([])
plt.subplot(122),plt.imshow(edges,cmap = 'gray')
plt.title('Edge Image'), plt.xticks([]), plt.yticks([])

plt.show()

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執行結果如下:

Reference : http://opencv-python-tutroals.readthedocs.org/en/latest/py_tutorials/py_imgproc/py_canny/py_canny.html