mirror of
https://github.com/wassname/scikit-image.git
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Ankit Agrawal
28 lines
986 B
Python
28 lines
986 B
Python
import numpy as np
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from numpy.testing import assert_array_equal
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from skimage.feature.util import pairwise_hamming_distance
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def test_pairwise_hamming_distance_range():
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"""Values of all the pairwise hamming distances should be in the range
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[0, 1].
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"""
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a = np.random.random_sample((10, 50)) > 0.5
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b = np.random.random_sample((20, 50)) > 0.5
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dist = pairwise_hamming_distance(a, b)
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assert np.all((0 <= dist) & (dist <= 1))
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def test_pairwise_hamming_distance_value():
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"""The result of pairwise_hamming_distance of two fixed sets of boolean
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vectors should be same as expected.
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"""
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np.random.seed(10)
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a = np.random.random_sample((4, 100)) > 0.5
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np.random.seed(20)
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b = np.random.random_sample((3, 100)) > 0.5
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result = pairwise_hamming_distance(a, b)
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expected = np.array([[ 0.5 , 0.49, 0.44],
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[ 0.44, 0.53, 0.52],
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[ 0.4 , 0.55, 0.5 ],
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[ 0.47, 0.48, 0.57]])
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assert_array_equal(result, expected)
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