mirror of
https://github.com/wassname/scikit-image.git
synced 2026-06-29 10:45:16 +08:00
Nelson Brown
94 lines
3.1 KiB
Python
94 lines
3.1 KiB
Python
import numpy as np
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from numpy import testing
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from skimage import data, color
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from skimage.util import img_as_bool
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from skimage.morphology import binary, grey, selem
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lena = color.rgb2gray(data.lena())
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bw_lena = lena > 100
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def test_non_square_image():
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strel = selem.square(3)
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binary_res = binary.binary_erosion(bw_lena[:100, :200], strel)
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grey_res = img_as_bool(grey.erosion(bw_lena[:100, :200], strel))
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testing.assert_array_equal(binary_res, grey_res)
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def test_binary_erosion():
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strel = selem.square(3)
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binary_res = binary.binary_erosion(bw_lena, strel)
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grey_res = img_as_bool(grey.erosion(bw_lena, strel))
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testing.assert_array_equal(binary_res, grey_res)
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def test_binary_dilation():
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strel = selem.square(3)
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binary_res = binary.binary_dilation(bw_lena, strel)
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grey_res = img_as_bool(grey.dilation(bw_lena, strel))
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testing.assert_array_equal(binary_res, grey_res)
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def test_binary_closing():
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strel = selem.square(3)
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binary_res = binary.binary_closing(bw_lena, strel)
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grey_res = img_as_bool(grey.closing(bw_lena, strel))
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testing.assert_array_equal(binary_res, grey_res)
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def test_binary_opening():
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strel = selem.square(3)
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binary_res = binary.binary_opening(bw_lena, strel)
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grey_res = img_as_bool(grey.opening(bw_lena, strel))
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testing.assert_array_equal(binary_res, grey_res)
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def test_selem_overflow():
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strel = np.ones((17, 17), dtype=np.uint8)
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img = np.zeros((20, 20))
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img[2:19, 2:19] = 1
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binary_res = binary.binary_erosion(img, strel)
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grey_res = img_as_bool(grey.erosion(img, strel))
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testing.assert_array_equal(binary_res, grey_res)
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def test_out_argument():
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for func in (binary.binary_erosion, binary.binary_dilation):
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strel = np.ones((3, 3), dtype=np.uint8)
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img = np.ones((10, 10))
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out = np.zeros_like(img)
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out_saved = out.copy()
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func(img, strel, out=out)
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testing.assert_(np.any(out != out_saved))
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testing.assert_array_equal(out, func(img, strel))
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def test_default_selem():
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functions = [binary.binary_erosion, binary.binary_dilation,
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binary.binary_opening, binary.binary_closing]
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strel = selem.diamond(radius=1)
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image = np.array([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
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[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
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[0, 0, 1, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 1, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 1, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 1, 1, 1, 0, 0, 1, 0, 0],
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[0, 0, 1, 1, 1, 0, 0, 1, 0, 0],
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[0, 0, 1, 1, 1, 0, 0, 1, 0, 0],
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[0, 0, 1, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 1, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 1, 1, 1, 1, 1, 1, 0, 0],
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[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
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[0, 0, 0, 0, 0, 0, 0, 0, 0, 0]], np.uint8)
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for function in functions:
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im_expected = function(image, strel)
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im_test = function(image)
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yield testing.assert_array_equal, im_expected, im_test
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if __name__ == '__main__':
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testing.run_module_suite()
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