mirror of
https://github.com/wassname/scikit-image.git
synced 2026-07-10 08:20:32 +08:00
Vincent Albufera
48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
"""
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===============================================================================
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Harris Corner detector
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===============================================================================
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The Harris corner filter [1]_ detects "interest points" [2]_ using edge
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detection in multiple directions.
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.. [1] http://en.wikipedia.org/wiki/Corner_detection
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.. [2] http://en.wikipedia.org/wiki/Interest_point_detection
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"""
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from matplotlib import pyplot as plt
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from skimage import data, img_as_float
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from skimage.feature import harris
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def plot_harris_points(image, filtered_coords):
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""" plots corners found in image"""
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plt.plot()
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plt.imshow(image, cmap=plt.cm.gray)
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plt.plot([p[1] for p in filtered_coords],
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[p[0] for p in filtered_coords],
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'r.')
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plt.axis('off')
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plt.show()
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# display results
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plt.figure(figsize=(8, 6))
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im = img_as_float(data.lena())
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im2 = img_as_float(data.text())
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filtered_coords = harris(im, min_distance=4)
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plt.subplot(121)
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plot_harris_points(im, filtered_coords)
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filtered_coords = harris(im2, min_distance=4)
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plt.subplot(122)
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plot_harris_points(im2, filtered_coords)
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plt.subplots_adjust(wspace=0.02, hspace=0.02, top=0.9,
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bottom=0.02, left=0.02, right=0.98)
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