65 lines
2.3 KiB
Python
65 lines
2.3 KiB
Python
import numpy as np
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from skimage._shared.testing import assert_array_equal
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from skimage._shared import testing
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from skimage.util.compare import compare_images
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def test_compate_images_ValueError_shape():
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img1 = np.zeros((10, 10), dtype=np.uint8)
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img2 = np.zeros((10, 1), dtype=np.uint8)
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with testing.raises(ValueError):
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compare_images(img1, img2)
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def test_compare_images_diff():
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img1 = np.zeros((10, 10), dtype=np.uint8)
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img1[3:8, 3:8] = 255
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img2 = np.zeros_like(img1)
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img2[3:8, 0:8] = 255
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expected_result = np.zeros_like(img1, dtype=np.float64)
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expected_result[3:8, 0:3] = 1
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result = compare_images(img1, img2, method='diff')
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assert_array_equal(result, expected_result)
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def test_compare_images_blend():
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img1 = np.zeros((10, 10), dtype=np.uint8)
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img1[3:8, 3:8] = 255
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img2 = np.zeros_like(img1)
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img2[3:8, 0:8] = 255
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expected_result = np.zeros_like(img1, dtype=np.float64)
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expected_result[3:8, 3:8] = 1
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expected_result[3:8, 0:3] = 0.5
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result = compare_images(img1, img2, method='blend')
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assert_array_equal(result, expected_result)
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def test_compare_images_checkerboard_default():
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img1 = np.zeros((2**4, 2**4), dtype=np.uint8)
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img2 = np.full(img1.shape, fill_value=255, dtype=np.uint8)
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res = compare_images(img1, img2, method='checkerboard')
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exp_row1 = np.array([0., 0., 1., 1., 0., 0., 1., 1., 0., 0., 1., 1., 0., 0., 1., 1.])
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exp_row2 = np.array([1., 1., 0., 0., 1., 1., 0., 0., 1., 1., 0., 0., 1., 1., 0., 0.])
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for i in (0, 1, 4, 5, 8, 9, 12, 13):
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assert_array_equal(res[i, :], exp_row1)
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for i in (2, 3, 6, 7, 10, 11, 14, 15):
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assert_array_equal(res[i, :], exp_row2)
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def test_compare_images_checkerboard_tuple():
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img1 = np.zeros((2**4, 2**4), dtype=np.uint8)
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img2 = np.full(img1.shape, fill_value=255, dtype=np.uint8)
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res = compare_images(img1, img2, method='checkerboard', n_tiles=(4, 8))
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exp_row1 = np.array(
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[0., 0., 1., 1., 0., 0., 1., 1., 0., 0., 1., 1., 0., 0., 1., 1.]
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)
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exp_row2 = np.array(
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[1., 1., 0., 0., 1., 1., 0., 0., 1., 1., 0., 0., 1., 1., 0., 0.]
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)
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for i in (0, 1, 2, 3, 8, 9, 10, 11):
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assert_array_equal(res[i, :], exp_row1)
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for i in (4, 5, 6, 7, 12, 13, 14, 15):
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assert_array_equal(res[i, :], exp_row2)
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