137 lines
4.7 KiB
Python
Executable File
137 lines
4.7 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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from vips8 import vips
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unsigned_formats = [Vips.BandFormat.UCHAR,
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Vips.BandFormat.USHORT,
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Vips.BandFormat.UINT]
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signed_formats = [Vips.BandFormat.CHAR,
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Vips.BandFormat.SHORT,
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Vips.BandFormat.INT]
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float_formats = [Vips.BandFormat.FLOAT,
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Vips.BandFormat.DOUBLE]
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complex_formats = [Vips.BandFormat.COMPLEX,
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Vips.BandFormat.DPCOMPLEX]
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int_formats = unsigned_formats + signed_formats
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noncomplex_formats = int_formats + float_formats
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all_formats = int_formats + float_formats + complex_formats
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colour_colourspaces = [Vips.Interpretation.XYZ,
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Vips.Interpretation.LAB,
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Vips.Interpretation.LABQ,
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Vips.Interpretation.LCH,
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Vips.Interpretation.CMC,
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Vips.Interpretation.LABS,
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Vips.Interpretation.SCRGB,
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Vips.Interpretation.SRGB,
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Vips.Interpretation.RGB16,
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Vips.Interpretation.YXY]
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mono_colourspaces = [Vips.Interpretation.GREY16,
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Vips.Interpretation.B_W]
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all_colourspaces = colour_colourspaces + mono_colourspaces
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# an expanding zip ... if either of the args is not a list, duplicate it down
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# the other
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def zip_expand(x, y):
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if isinstance(x, list) and isinstance(y, list):
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return 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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# run a 1-ary function on a thing -- loop over elements if the
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# thing is a list
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def run_fn(fn, x):
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if isinstance(x, list):
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return [fn(i) for i in x]
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else:
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return fn(x)
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# run a 2-ary function on two things -- loop over elements pairwise if the
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# things are lists
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def run_fn2(fn, x, y):
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if isinstance(x, Vips.Image) or isinstance(y, Vips.Image):
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return fn(x, y)
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elif isinstance(x, list) or isinstance(y, list):
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return [fn(i, j) for i, j in zip_expand(x, y)]
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else:
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return fn(x, y)
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class TestColour(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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# run a function on an image and on a single pixel, the results
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# should match
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def run_cmp(self, message, im, x, y, fn):
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a = im.getpoint(x, y)
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v1 = fn(a)
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im2 = fn(im)
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v2 = im2.getpoint(x, y)
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self.assertAlmostEqualObjects(v1, v2, msg = message)
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# run a function on a pair of images and on a pair of pixels, the results
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# should match
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def run_cmp2(self, message, left, right, x, y, fn):
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a = left.getpoint(x, y)
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b = right.getpoint(x, y)
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v1 = fn(a, b)
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after = fn(left, right)
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v2 = after.getpoint(x, y)
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self.assertAlmostEqualObjects(v1, v2, msg = message)
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# run a function on a pair of images
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# 50,50 and 10,10 should have different values on the test image
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def run_test2(self, message, left, right, fn):
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self.run_cmp2(message, left, right, 50, 50,
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lambda x, y: run_fn2(fn, x, y))
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self.run_cmp2(message, left, right, 10, 10,
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lambda x, y: run_fn2(fn, x, y))
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def setUp(self):
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im = Vips.Image.mask_ideal(100, 100, 0.5, optical = True)
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self.colour = im * [1, 2, 3] + [2, 3, 4]
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self.mono = self.colour.extract_band(1)
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self.all_images = [self.mono, self.colour]
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def test_colourspace(self):
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# mid-grey in Lab
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test = Vips.Image.black(100, 100) + [50, 0, 0]
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test = test.copy(interpretation = Vips.Interpretation.LAB)
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im = test
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for col in colour_colourspaces + [Vips.Interpretation.LAB]:
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im = im.colourspace(col)
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self.assertEqual(im.interpretation, col)
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before = test.getpoint(10, 10)
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after = im.getpoint(10, 10)
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self.assertAlmostEqualObjects(before, after, places = 1)
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test = Vips.Image.black(100, 100) + [50, 0, 0]
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test = test.copy(interpretation = Vips.Interpretation.LAB)
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im = im.colourspace(Vips.Interpretation.XYZ)
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after = im.getpoint(10, 10)
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print 'after =', after
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self.assertAlmostEqualObjects(after, [17.5064, 18.4187, 20.0547])
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if __name__ == '__main__':
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unittest.main()
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