56 lines
1.7 KiB
Python
56 lines
1.7 KiB
Python
# vim: set fileencoding=utf-8 :
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import pytest
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import pyvips
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class TestMorphology:
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def test_countlines(self):
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im = pyvips.Image.black(100, 100)
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im = im.draw_line(255, 0, 50, 100, 50)
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n_lines = im.countlines(pyvips.Direction.HORIZONTAL)
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assert n_lines == 1
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def test_labelregions(self):
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im = pyvips.Image.black(100, 100)
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im = im.draw_circle(255, 50, 50, 25, fill=True)
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mask, opts = im.labelregions(segments=True)
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assert opts['segments'] == 3
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assert mask.max() == 2
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def test_erode(self):
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im = pyvips.Image.black(100, 100)
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im = im.draw_circle(255, 50, 50, 25, fill=True)
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im2 = im.erode([[128, 255, 128],
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[255, 255, 255],
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[128, 255, 128]])
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assert im.width == im2.width
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assert im.height == im2.height
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assert im.bands == im2.bands
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assert im.avg() > im2.avg()
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def test_dilate(self):
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im = pyvips.Image.black(100, 100)
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im = im.draw_circle(255, 50, 50, 25, fill=True)
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im2 = im.dilate([[128, 255, 128],
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[255, 255, 255],
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[128, 255, 128]])
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assert im.width == im2.width
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assert im.height == im2.height
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assert im.bands == im2.bands
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assert im2.avg() > im.avg()
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def test_rank(self):
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im = pyvips.Image.black(100, 100)
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im = im.draw_circle(255, 50, 50, 25, fill=True)
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im2 = im.rank(3, 3, 8)
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assert im.width == im2.width
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assert im.height == im2.height
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assert im.bands == im2.bands
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assert im2.avg() > im.avg()
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if __name__ == '__main__':
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pytest.main()
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