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https://github.com/wassname/scikit-image.git
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69 lines
3.3 KiB
Python
69 lines
3.3 KiB
Python
import numpy as np
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from numpy.testing import assert_array_equal, assert_raises
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from skimage import data
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from skimage import transform as tf
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from skimage.color import rgb2gray
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from skimage.feature import (descriptor_brief, match_binary_descriptors,
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corner_peaks, corner_harris,
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create_keypoint_recarray)
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def test_descriptor_brief_color_image_unsupported_error():
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"""Brief descriptors can be evaluated on gray-scale images only."""
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img = np.zeros((20, 20, 3))
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keypoints_loc = np.asarray([[7, 5], [11, 13]])
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keypoints = create_keypoint_recarray(keypoints_loc[:, 0],
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keypoints_loc[:, 1])
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assert_raises(ValueError, descriptor_brief, img, keypoints)
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def test_descriptor_brief_normal_mode():
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"""Verify the computed BRIEF descriptors with expected for normal mode."""
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img = data.lena()
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img = rgb2gray(img)
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keypoints_loc = corner_peaks(corner_harris(img), min_distance=5)
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keypoints = create_keypoint_recarray(keypoints_loc[:, 0],
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keypoints_loc[:, 1])
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descriptors, keypoints = descriptor_brief(img, keypoints[:8],
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descriptor_size=8)
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expected = np.array([[ True, False, True, False, True, True, False, False],
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[False, False, False, False, True, False, False, False],
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[ True, True, True, True, True, True, True, True],
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[ True, False, True, True, False, True, False, True],
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[False, True, True, True, True, True, True, True],
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[ True, False, False, False, False, True, False, True],
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[False, True, True, True, False, False, True, False],
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[False, False, False, False, True, False, False, False]], dtype=bool)
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assert_array_equal(descriptors, expected)
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def test_descriptor_brief_uniform_mode():
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"""Verify the computed BRIEF descriptors with expected for uniform mode."""
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img = data.lena()
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img = rgb2gray(img)
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keypoints_loc = corner_peaks(corner_harris(img), min_distance=5)
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keypoints = create_keypoint_recarray(keypoints_loc[:, 0],
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keypoints_loc[:, 1])
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descriptors, keypoints = descriptor_brief(img, keypoints[:8],
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descriptor_size=8,
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mode='uniform')
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expected = np.array([[ True, False, True, False, False, True, False, False],
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[False, True, False, False, True, True, True, True],
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[ True, False, False, False, False, False, False, False],
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[False, True, True, False, False, False, True, False],
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[False, False, False, False, False, False, True, False],
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[False, True, False, False, True, False, False, False],
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[False, False, True, True, False, False, True, True],
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[ True, True, False, False, False, False, False, False]], dtype=bool)
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assert_array_equal(descriptors, expected)
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if __name__ == '__main__':
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from numpy import testing
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testing.run_module_suite()
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