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