mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-28 00:45:02 +08:00
Olivier Debeir
45 lines
899 B
Python
45 lines
899 B
Python
"""
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===================
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Entropy
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===================
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"""
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from skimage import data
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from skimage.filter.rank import entropy
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from skimage.morphology import disk
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import numpy as np
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import matplotlib.pyplot as plt
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# defining a 8- and a 16-bit test images
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a8 = data.camera()
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a16 = data.camera().astype(np.uint16)*4
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ent8 = entropy(a8,disk(5)) # pixel value contain 10x the local entropy
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ent16 = entropy(a16,disk(5)) # pixel value contain 1000x the local entropy
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# display results
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plt.figure(figsize=(10, 10))
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plt.subplot(2,2,1)
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plt.imshow(a8, cmap=plt.cm.gray)
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plt.xlabel('8-bit image')
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plt.colorbar()
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plt.subplot(2,2,2)
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plt.imshow(ent8, cmap=plt.cm.jet)
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plt.xlabel('entropy*10')
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plt.colorbar()
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plt.subplot(2,2,3)
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plt.imshow(a16, cmap=plt.cm.gray)
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plt.xlabel('16-bit image')
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plt.colorbar()
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plt.subplot(2,2,4)
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plt.imshow(ent16, cmap=plt.cm.jet)
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plt.xlabel('entropy*1000')
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plt.colorbar()
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plt.show()
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