83 lines
2.7 KiB
Python
Executable File
83 lines
2.7 KiB
Python
Executable File
#!/usr/bin/python
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import unittest
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import math
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#import logging
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#logging.basicConfig(level = logging.DEBUG)
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from gi.repository import Vips
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# an expanding zip ... if either of the args is a scalar or a one-element list,
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# duplicate it down the other side
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def zip_expand(x, y):
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# handle singleton list case
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if isinstance(x, list) and len(x) == 1:
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x = x[0]
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if isinstance(y, list) and len(y) == 1:
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y = y[0]
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if isinstance(x, list) and isinstance(y, list):
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return list(zip(x, y))
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elif isinstance(x, list):
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return [[i, y] for i in x]
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elif isinstance(y, list):
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return [[x, j] for j in y]
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else:
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return [[x, y]]
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class TestMorphology(unittest.TestCase):
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# test a pair of things which can be lists for approx. equality
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def assertAlmostEqualObjects(self, a, b, places = 4, msg = ''):
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# print 'assertAlmostEqualObjects %s = %s' % (a, b)
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for x, y in zip_expand(a, b):
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self.assertAlmostEqual(x, y, places = places, msg = msg)
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def test_countlines(self):
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im = Vips.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(Vips.Direction.HORIZONTAL)
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self.assertEqual(n_lines, 1)
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def test_labelregions(self):
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im = Vips.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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self.assertEqual(opts['segments'], 3)
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self.assertEqual(mask.max(), 2)
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def test_erode(self):
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im = Vips.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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self.assertEqual(im.width, im2.width)
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self.assertEqual(im.height, im2.height)
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self.assertEqual(im.bands, im2.bands)
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self.assertTrue(im.avg() > im2.avg())
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def test_dilate(self):
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im = Vips.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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self.assertEqual(im.width, im2.width)
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self.assertEqual(im.height, im2.height)
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self.assertEqual(im.bands, im2.bands)
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self.assertTrue(im2.avg() > im.avg())
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def test_rank(self):
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im = Vips.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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self.assertEqual(im.width, im2.width)
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self.assertEqual(im.height, im2.height)
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self.assertEqual(im.bands, im2.bands)
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self.assertTrue(im2.avg() > im.avg())
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if __name__ == '__main__':
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unittest.main()
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