mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-30 12:55:46 +08:00
Ankit Agrawal
37 lines
1.0 KiB
Python
37 lines
1.0 KiB
Python
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def _remove_border_keypoints(image, keypoints, dist):
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"""Removes keypoints that are within dist pixels from the image border."""
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width = image.shape[0]
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height = image.shape[1]
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keypoints = keypoints[(dist - 1 < keypoints[:, 0])
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& (keypoints[:, 0] < width - dist + 1)
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& (dist - 1 < keypoints[:, 1])
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& (keypoints[:, 1] < height - dist + 1)]
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return keypoints
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def pairwise_hamming_distance(array1, array2):
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"""Calculate hamming dissimilarity measure between two sets of
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vectors.
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Parameters
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----------
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array1 : (P1, D) array
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P1 vectors of size D.
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array2 : (P2, D) array
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P2 vectors of size D.
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Returns
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-------
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distance : (P1, P2) array of dtype float
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2D ndarray with value at an index (i, j) representing the hamming
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distance in the range [0, 1] between ith vector in array1 and jth
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vector in array2.
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"""
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distance = (array1[:, None] != array2[None]).mean(axis=2)
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return distance
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