mirror of
https://github.com/wassname/scikit-image.git
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Tony S Yu
43 lines
1.1 KiB
Python
43 lines
1.1 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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import numpy as np
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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.imshow(image)
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y, x = np.transpose(filtered_coords)
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plt.plot(x, y, 'b.')
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plt.axis('off')
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# display results
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plt.figure(figsize=(8, 3))
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im_lena = img_as_float(data.lena())
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im_text = img_as_float(data.text())
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filtered_coords = harris(im_lena, min_distance=4)
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plt.axes([0, 0, 0.3, 0.95])
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plot_harris_points(im_lena, filtered_coords)
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filtered_coords = harris(im_text, min_distance=4)
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plt.axes([0.2, 0, 0.77, 1])
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plot_harris_points(im_text, filtered_coords)
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plt.show()
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