e81900b187
we had both a class member bandjoin, and an instance member Vips.Image.bandjoin([i1, i2, i3..]) i1.ibandjoin([i2, i3..]) this was confusing and annoying ... get rid of the class one and just use bandjoin everywhere, so this is now the way to do it: i1.bandjoin([i2, i3..])
824 lines
28 KiB
Python
Executable File
824 lines
28 KiB
Python
Executable File
#!/usr/bin/python
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from __future__ import division
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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 functools import reduce
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Vips.leak_set(True)
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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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max_value = {Vips.BandFormat.UCHAR: 0xff,
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Vips.BandFormat.USHORT: 0xffff,
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Vips.BandFormat.UINT: 0xffffffff,
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Vips.BandFormat.CHAR: 0x7f,
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Vips.BandFormat.SHORT: 0x7fff,
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Vips.BandFormat.INT: 0x7fffffff,
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Vips.BandFormat.FLOAT: 1.0,
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Vips.BandFormat.DOUBLE: 1.0,
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Vips.BandFormat.COMPLEX: 1.0,
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Vips.BandFormat.DPCOMPLEX: 1.0}
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sizeof_format = {Vips.BandFormat.UCHAR: 1,
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Vips.BandFormat.USHORT: 2,
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Vips.BandFormat.UINT: 4,
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Vips.BandFormat.CHAR: 1,
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Vips.BandFormat.SHORT: 2,
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Vips.BandFormat.INT: 4,
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Vips.BandFormat.FLOAT: 4,
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Vips.BandFormat.DOUBLE: 8,
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Vips.BandFormat.COMPLEX: 8,
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Vips.BandFormat.DPCOMPLEX: 16}
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rot45_angles = [Vips.Angle45.D0,
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Vips.Angle45.D45,
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Vips.Angle45.D90,
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Vips.Angle45.D135,
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Vips.Angle45.D180,
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Vips.Angle45.D225,
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Vips.Angle45.D270,
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Vips.Angle45.D315]
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rot45_angle_bonds = [Vips.Angle45.D0,
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Vips.Angle45.D315,
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Vips.Angle45.D270,
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Vips.Angle45.D225,
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Vips.Angle45.D180,
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Vips.Angle45.D135,
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Vips.Angle45.D90,
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Vips.Angle45.D45]
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rot_angles = [Vips.Angle.D0,
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Vips.Angle.D90,
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Vips.Angle.D180,
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Vips.Angle.D270]
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rot_angle_bonds = [Vips.Angle.D0,
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Vips.Angle.D270,
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Vips.Angle.D180,
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Vips.Angle.D90]
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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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if len(x) != len(y):
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raise Vips.Error("zip_expand list args not equal length")
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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 TestConversion(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_unary(self, message, im, x, y, fn):
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a = im(x, y)
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v1 = fn(a)
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im2 = fn(im)
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v2 = im2(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_cmp_binary(self, message, left, right, x, y, fn):
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a = left(x, y)
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b = right(x, y)
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v1 = fn(a, b)
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after = fn(left, right)
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v2 = after(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_testbinary(self, message, left, right, fn):
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self.run_cmp_binary(message, left, right, 50, 50, fn)
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self.run_cmp_binary(message, left, right, 10, 10, fn)
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# run a function on an image,
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# 50,50 and 10,10 should have different values on the test image
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def run_testunary(self, message, im, fn):
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self.run_cmp_unary(message, im, 50, 50, fn)
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self.run_cmp_unary(message, im, 10, 10, fn)
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def run_unary(self, images, fn, fmt = all_formats):
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[self.run_testunary(fn.__name__ + (' %s' % y), x.cast(y), fn)
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for x in images for y in fmt]
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def run_binary(self, images, fn, fmt = all_formats):
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[self.run_testbinary(fn.__name__ + (' %s %s' % (y, z)),
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x.cast(y), x.cast(z), fn)
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for x in images for y in fmt for z in fmt]
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def setUp(self):
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im = Vips.Image.mask_ideal(100, 100, 0.5, reject = True, optical = True)
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self.colour = im * [1, 2, 3] + [2, 3, 4]
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self.mono = self.colour[1]
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self.all_images = [self.mono, self.colour]
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def test_band_and(self):
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def band_and(x):
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if isinstance(x, Vips.Image):
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return x.bandand()
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else:
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return [reduce(lambda a, b: int(a) & int(b), x)]
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self.run_unary(self.all_images, band_and, fmt = int_formats)
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def test_band_or(self):
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def band_or(x):
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if isinstance(x, Vips.Image):
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return x.bandor()
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else:
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return [reduce(lambda a, b: int(a) | int(b), x)]
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self.run_unary(self.all_images, band_or, fmt = int_formats)
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def test_band_eor(self):
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def band_eor(x):
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if isinstance(x, Vips.Image):
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return x.bandeor()
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else:
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return [reduce(lambda a, b: int(a) ^ int(b), x)]
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self.run_unary(self.all_images, band_eor, fmt = int_formats)
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def test_bandjoin(self):
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def bandjoin(x, y):
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if isinstance(x, Vips.Image) and isinstance(y, Vips.Image):
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return x.bandjoin(y)
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else:
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return x + y
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self.run_binary(self.all_images, bandjoin)
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def test_bandjoin_const(self):
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x = self.colour.bandjoin(1)
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self.assertEqual(x.bands, 4)
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self.assertEqual(x[3].avg(), 1)
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x = self.colour.bandjoin([1,2])
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self.assertEqual(x.bands, 5)
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self.assertEqual(x[3].avg(), 1)
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self.assertEqual(x[4].avg(), 2)
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def test_bandmean(self):
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def bandmean(x):
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if isinstance(x, Vips.Image):
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return x.bandmean()
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else:
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return [sum(x) // len(x)]
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self.run_unary(self.all_images, bandmean, fmt = noncomplex_formats)
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def test_bandrank(self):
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def median(x, y):
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joined = [[a, b] for a, b in zip(x, y)]
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# .sort() isn't a function, so we have to run this as a separate
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# pass
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[x.sort() for x in joined]
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return [x[len(x) // 2] for x in joined]
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def bandrank(x, y):
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if isinstance(x, Vips.Image) and isinstance(y, Vips.Image):
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return Vips.Image.bandrank([x, y])
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else:
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return median(x, y)
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self.run_binary(self.all_images, bandrank, fmt = noncomplex_formats)
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def test_cache(self):
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def cache(x):
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if isinstance(x, Vips.Image):
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return x.cache()
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else:
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return x
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self.run_unary(self.all_images, cache)
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def test_copy(self):
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x = self.colour.copy(interpretation = Vips.Interpretation.LAB)
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self.assertEqual(x.interpretation, Vips.Interpretation.LAB)
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x = self.colour.copy(xres = 42)
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self.assertEqual(x.xres, 42)
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x = self.colour.copy(yres = 42)
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self.assertEqual(x.yres, 42)
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x = self.colour.copy(xoffset = 42)
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self.assertEqual(x.xoffset, 42)
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x = self.colour.copy(yoffset = 42)
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self.assertEqual(x.yoffset, 42)
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x = self.colour.copy(coding = Vips.Coding.NONE)
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self.assertEqual(x.coding, Vips.Coding.NONE)
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def test_bandfold(self):
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x = self.mono.bandfold()
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self.assertEqual(x.width, 1)
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self.assertEqual(x.bands, self.mono.width)
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y = x.bandunfold()
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self.assertEqual(y.width, self.mono.width)
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self.assertEqual(y.bands, 1)
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self.assertEqual(x.avg(), y.avg())
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x = self.mono.bandfold(factor = 2)
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self.assertEqual(x.width, self.mono.width / 2)
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self.assertEqual(x.bands, 2)
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y = x.bandunfold(factor = 2)
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self.assertEqual(y.width, self.mono.width)
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self.assertEqual(y.bands, 1)
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self.assertEqual(x.avg(), y.avg())
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def test_byteswap(self):
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x = self.mono.cast("ushort")
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y = x.byteswap().byteswap()
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self.assertEqual(x.width, y.width)
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self.assertEqual(x.height, y.height)
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self.assertEqual(x.bands, y.bands)
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self.assertEqual(x.avg(), y.avg())
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def test_embed(self):
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for fmt in all_formats:
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test = self.colour.cast(fmt)
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im = test.embed(20, 20,
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self.colour.width + 40,
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self.colour.height + 40)
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pixel = im(10, 10)
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self.assertAlmostEqualObjects(pixel, [0, 0, 0])
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pixel = im(30, 30)
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self.assertAlmostEqualObjects(pixel, [2, 3, 4])
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pixel = im(im.width - 10, im.height - 10)
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self.assertAlmostEqualObjects(pixel, [0, 0, 0])
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im = test.embed(20, 20,
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self.colour.width + 40,
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self.colour.height + 40,
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extend = Vips.Extend.COPY)
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pixel = im(10, 10)
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self.assertAlmostEqualObjects(pixel, [2, 3, 4])
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pixel = im(im.width - 10, im.height - 10)
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self.assertAlmostEqualObjects(pixel, [2, 3, 4])
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im = test.embed(20, 20,
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self.colour.width + 40,
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self.colour.height + 40,
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extend = Vips.Extend.BACKGROUND,
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background = [7, 8, 9])
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pixel = im(10, 10)
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self.assertAlmostEqualObjects(pixel, [7, 8, 9])
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pixel = im(im.width - 10, im.height - 10)
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self.assertAlmostEqualObjects(pixel, [7, 8, 9])
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im = test.embed(20, 20,
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self.colour.width + 40,
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self.colour.height + 40,
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extend = Vips.Extend.WHITE)
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pixel = im(10, 10)
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# uses 255 in all bytes of ints, 255.0 for float
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pixel = [int(x) & 0xff for x in pixel]
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self.assertAlmostEqualObjects(pixel, [255, 255, 255])
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pixel = im(im.width - 10, im.height - 10)
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pixel = [int(x) & 0xff for x in pixel]
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self.assertAlmostEqualObjects(pixel, [255, 255, 255])
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def test_extract(self):
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for fmt in all_formats:
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test = self.colour.cast(fmt)
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pixel = test(30, 30)
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self.assertAlmostEqualObjects(pixel, [2, 3, 4])
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sub = test.extract_area(25, 25, 10, 10)
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pixel = sub(5, 5)
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self.assertAlmostEqualObjects(pixel, [2, 3, 4])
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sub = test.extract_band(1, n = 2)
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pixel = sub(30, 30)
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self.assertAlmostEqualObjects(pixel, [3, 4])
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def test_slice(self):
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test = self.colour
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bands = [x.avg() for x in test]
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x = test[0].avg()
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self.assertEqual(x, bands[0])
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x = test[-1].avg()
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self.assertAlmostEqualObjects(x, bands[2])
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x = [i.avg() for i in test[1:3]]
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self.assertAlmostEqualObjects(x, bands[1:3])
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x = [i.avg() for i in test[1:-1]]
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self.assertAlmostEqualObjects(x, bands[1:-1])
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x = [i.avg() for i in test[:2]]
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self.assertAlmostEqualObjects(x, bands[:2])
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x = [i.avg() for i in test[1:]]
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self.assertAlmostEqualObjects(x, bands[1:])
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x = [i.avg() for i in test[-1]]
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self.assertAlmostEqualObjects(x, bands[-1])
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def test_crop(self):
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for fmt in all_formats:
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test = self.colour.cast(fmt)
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pixel = test(30, 30)
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self.assertAlmostEqualObjects(pixel, [2, 3, 4])
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sub = test.crop(25, 25, 10, 10)
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pixel = sub(5, 5)
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self.assertAlmostEqualObjects(pixel, [2, 3, 4])
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def test_falsecolour(self):
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for fmt in all_formats:
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test = self.colour.cast(fmt)
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im = test.falsecolour()
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self.assertEqual(im.width, test.width)
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self.assertEqual(im.height, test.height)
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self.assertEqual(im.bands, 3)
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pixel = im(30, 30)
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self.assertAlmostEqualObjects(pixel, [20, 0, 41])
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def test_flatten(self):
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for fmt in unsigned_formats + [Vips.BandFormat.SHORT,
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Vips.BandFormat.INT] + float_formats:
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mx = 255
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alpha = mx / 2.0
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nalpha = mx - alpha
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test = self.colour.bandjoin(alpha).cast(fmt)
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pixel = test(30, 30)
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predict = [int(x) * alpha / mx for x in pixel[:-1]]
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im = test.flatten()
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self.assertEqual(im.bands, 3)
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pixel = im(30, 30)
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for x, y in zip(pixel, predict):
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# we use float arithetic for int and uint, so the rounding
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# differs ... don't require huge accuracy
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self.assertLess(abs(x - y), 2)
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im = test.flatten(background = [100, 100, 100])
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pixel = test(30, 30)
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predict = [int(x) * alpha / mx + (100 * nalpha) / mx
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for x in pixel[:-1]]
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self.assertEqual(im.bands, 3)
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pixel = im(30, 30)
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for x, y in zip(pixel, predict):
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self.assertLess(abs(x - y), 2)
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def test_premultiply(self):
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for fmt in unsigned_formats + [Vips.BandFormat.SHORT,
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Vips.BandFormat.INT] + float_formats:
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mx = 255
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alpha = mx / 2.0
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nalpha = mx - alpha
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test = self.colour.bandjoin(alpha).cast(fmt)
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pixel = test(30, 30)
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predict = [int(x) * alpha / mx for x in pixel[:-1]] + [alpha]
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im = test.premultiply()
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self.assertEqual(im.bands, test.bands)
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pixel = im(30, 30)
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for x, y in zip(pixel, predict):
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# we use float arithetic for int and uint, so the rounding
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# differs ... don't require huge accuracy
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self.assertLess(abs(x - y), 2)
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def test_unpremultiply(self):
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for fmt in unsigned_formats + [Vips.BandFormat.SHORT,
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Vips.BandFormat.INT] + float_formats:
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mx = 255
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alpha = mx / 2.0
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nalpha = mx - alpha
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test = self.colour.bandjoin(alpha).cast(fmt)
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pixel = test(30, 30)
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predict = [int(x) / (alpha / mx) for x in pixel[:-1]] + [alpha]
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im = test.unpremultiply()
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self.assertEqual(im.bands, test.bands)
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pixel = im(30, 30)
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for x, y in zip(pixel, predict):
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# we use float arithetic for int and uint, so the rounding
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# differs ... don't require huge accuracy
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self.assertLess(abs(x - y), 2)
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def test_flip(self):
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for fmt in all_formats:
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test = self.colour.cast(fmt)
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result = test.fliphor()
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result = result.flipver()
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result = result.fliphor()
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result = result.flipver()
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diff = (test - result).abs().max()
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self.assertEqual(diff, 0)
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def test_gamma(self):
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exponent = 2.4
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for fmt in noncomplex_formats:
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mx = max_value[fmt]
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test = (self.colour + mx / 2.0).cast(fmt)
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norm = mx ** exponent / mx
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result = test.gamma()
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before = test(30, 30)
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after = result(30, 30)
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predict = [x ** exponent / norm for x in before]
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for a, b in zip(after, predict):
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# ie. less than 1% error, rounding on 7-bit images means this is
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# all we can expect
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self.assertLess(abs(a - b), mx / 100.0)
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exponent = 1.2
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for fmt in noncomplex_formats:
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|
mx = max_value[fmt]
|
|
test = (self.colour + mx / 2.0).cast(fmt)
|
|
|
|
norm = mx ** exponent / mx
|
|
result = test.gamma(exponent = 1.0 / 1.2)
|
|
before = test(30, 30)
|
|
after = result(30, 30)
|
|
predict = [x ** exponent / norm for x in before]
|
|
for a, b in zip(after, predict):
|
|
# ie. less than 1% error, rounding on 7-bit images means this is
|
|
# all we can expect
|
|
self.assertLess(abs(a - b), mx / 100.0)
|
|
|
|
def test_grid(self):
|
|
test = self.colour.replicate(1, 12)
|
|
self.assertEqual(test.width, self.colour.width)
|
|
self.assertEqual(test.height, self.colour.height * 12)
|
|
|
|
for fmt in all_formats:
|
|
im = test.cast(fmt)
|
|
result = im.grid(test.width, 3, 4)
|
|
self.assertEqual(result.width, self.colour.width * 3)
|
|
self.assertEqual(result.height, self.colour.height * 4)
|
|
|
|
before = im(10, 10)
|
|
after = result(10 + test.width * 2, 10 + test.width * 2)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
before = im(50, 50)
|
|
after = result(50 + test.width * 2, 50 + test.width * 2)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
def test_ifthenelse(self):
|
|
test = self.mono > 3
|
|
for x in all_formats:
|
|
for y in all_formats:
|
|
t = (self.colour + 10).cast(x)
|
|
e = self.colour.cast(y)
|
|
r = test.ifthenelse(t, e)
|
|
|
|
self.assertEqual(r.width, self.colour.width)
|
|
self.assertEqual(r.height, self.colour.height)
|
|
self.assertEqual(r.bands, self.colour.bands)
|
|
|
|
predict = e(10, 10)
|
|
result = r(10, 10)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
predict = t(50, 50)
|
|
result = r(50, 50)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
test = self.colour > 3
|
|
for x in all_formats:
|
|
for y in all_formats:
|
|
t = (self.mono + 10).cast(x)
|
|
e = self.mono.cast(y)
|
|
r = test.ifthenelse(t, e)
|
|
|
|
self.assertEqual(r.width, self.colour.width)
|
|
self.assertEqual(r.height, self.colour.height)
|
|
self.assertEqual(r.bands, self.colour.bands)
|
|
|
|
cp = test(10, 10)
|
|
tp = t(10, 10) * 3
|
|
ep = e(10, 10) * 3
|
|
predict = [te if ce != 0 else ee
|
|
for ce, te, ee in zip(cp, tp, ep)]
|
|
result = r(10, 10)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
cp = test(50, 50)
|
|
tp = t(50, 50) * 3
|
|
ep = e(50, 50) * 3
|
|
predict = [te if ce != 0 else ee
|
|
for ce, te, ee in zip(cp, tp, ep)]
|
|
result = r(50, 50)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
test = self.colour > 3
|
|
for x in all_formats:
|
|
for y in all_formats:
|
|
t = (self.mono + 10).cast(x)
|
|
e = self.mono.cast(y)
|
|
r = test.ifthenelse(t, e, blend = True)
|
|
|
|
self.assertEqual(r.width, self.colour.width)
|
|
self.assertEqual(r.height, self.colour.height)
|
|
self.assertEqual(r.bands, self.colour.bands)
|
|
|
|
result = r(10, 10)
|
|
self.assertAlmostEqualObjects(result, [3, 3, 13])
|
|
|
|
test = self.mono > 3
|
|
r = test.ifthenelse([1, 2, 3], self.colour)
|
|
self.assertEqual(r.width, self.colour.width)
|
|
self.assertEqual(r.height, self.colour.height)
|
|
self.assertEqual(r.bands, self.colour.bands)
|
|
self.assertEqual(r.format, self.colour.format)
|
|
self.assertEqual(r.interpretation, self.colour.interpretation)
|
|
result = r(10, 10)
|
|
self.assertAlmostEqualObjects(result, [2, 3, 4])
|
|
result = r(50, 50)
|
|
self.assertAlmostEqualObjects(result, [1, 2, 3])
|
|
|
|
test = self.mono
|
|
r = test.ifthenelse([1, 2, 3], self.colour, blend = True)
|
|
self.assertEqual(r.width, self.colour.width)
|
|
self.assertEqual(r.height, self.colour.height)
|
|
self.assertEqual(r.bands, self.colour.bands)
|
|
self.assertEqual(r.format, self.colour.format)
|
|
self.assertEqual(r.interpretation, self.colour.interpretation)
|
|
result = r(10, 10)
|
|
self.assertAlmostEqualObjects(result, [2, 3, 4], places = 1)
|
|
result = r(50, 50)
|
|
self.assertAlmostEqualObjects(result, [3.0, 4.9, 6.9], places = 1)
|
|
|
|
def test_insert(self):
|
|
for x in all_formats:
|
|
for y in all_formats:
|
|
main = self.mono.cast(x)
|
|
sub = self.colour.cast(y)
|
|
r = main.insert(sub, 10, 10)
|
|
|
|
self.assertEqual(r.width, main.width)
|
|
self.assertEqual(r.height, main.height)
|
|
self.assertEqual(r.bands, sub.bands)
|
|
|
|
a = r(10, 10)
|
|
b = sub(0, 0)
|
|
self.assertAlmostEqualObjects(a, b)
|
|
|
|
a = r(0, 0)
|
|
b = main(0, 0) * 3
|
|
self.assertAlmostEqualObjects(a, b)
|
|
|
|
for x in all_formats:
|
|
for y in all_formats:
|
|
main = self.mono.cast(x)
|
|
sub = self.colour.cast(y)
|
|
r = main.insert(sub, 10, 10, expand = True, background = 100)
|
|
|
|
self.assertEqual(r.width, main.width + 10)
|
|
self.assertEqual(r.height, main.height + 10)
|
|
self.assertEqual(r.bands, sub.bands)
|
|
|
|
a = r(r.width - 5, 5)
|
|
self.assertAlmostEqualObjects(a, [100, 100, 100])
|
|
|
|
def test_arrayjoin(self):
|
|
max_width = 0
|
|
max_height = 0
|
|
max_bands = 0
|
|
for image in self.all_images:
|
|
if image.width > max_width:
|
|
max_width = image.width
|
|
if image.height > max_height:
|
|
max_height = image.height
|
|
if image.bands > max_bands:
|
|
max_bands = image.bands
|
|
|
|
im = Vips.Image.arrayjoin(self.all_images)
|
|
self.assertEqual(im.width, max_width * len(self.all_images))
|
|
self.assertEqual(im.height, max_height)
|
|
self.assertEqual(im.bands, max_bands)
|
|
|
|
im = Vips.Image.arrayjoin(self.all_images, across = 1)
|
|
self.assertEqual(im.width, max_width)
|
|
self.assertEqual(im.height, max_height * len(self.all_images))
|
|
self.assertEqual(im.bands, max_bands)
|
|
|
|
im = Vips.Image.arrayjoin(self.all_images, shim = 10)
|
|
self.assertEqual(im.width, max_width * len(self.all_images) +
|
|
10 * (len(self.all_images) - 1))
|
|
self.assertEqual(im.height, max_height)
|
|
self.assertEqual(im.bands, max_bands)
|
|
|
|
def test_msb(self):
|
|
for fmt in unsigned_formats:
|
|
mx = max_value[fmt]
|
|
size = sizeof_format[fmt]
|
|
test = (self.colour + mx / 8.0).cast(fmt)
|
|
im = test.msb()
|
|
|
|
before = test(10, 10)
|
|
predict = [int(x) >> ((size - 1) * 8) for x in before]
|
|
result = im(10, 10)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
before = test(50, 50)
|
|
predict = [int(x) >> ((size - 1) * 8) for x in before]
|
|
result = im(50, 50)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
for fmt in signed_formats:
|
|
mx = max_value[fmt]
|
|
size = sizeof_format[fmt]
|
|
test = (self.colour + mx / 8.0).cast(fmt)
|
|
im = test.msb()
|
|
|
|
before = test(10, 10)
|
|
predict = [128 + (int(x) >> ((size - 1) * 8)) for x in before]
|
|
result = im(10, 10)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
before = test(50, 50)
|
|
predict = [128 + (int(x) >> ((size - 1) * 8)) for x in before]
|
|
result = im(50, 50)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
for fmt in unsigned_formats:
|
|
mx = max_value[fmt]
|
|
size = sizeof_format[fmt]
|
|
test = (self.colour + mx / 8.0).cast(fmt)
|
|
im = test.msb(band = 1)
|
|
|
|
before = [test(10, 10)[1]]
|
|
predict = [int(x) >> ((size - 1) * 8) for x in before]
|
|
result = im(10, 10)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
before = [test(50, 50)[1]]
|
|
predict = [int(x) >> ((size - 1) * 8) for x in before]
|
|
result = im(50, 50)
|
|
self.assertAlmostEqualObjects(result, predict)
|
|
|
|
def test_recomb(self):
|
|
array = [[0.2, 0.5, 0.3]]
|
|
|
|
def recomb(x):
|
|
if isinstance(x, Vips.Image):
|
|
return x.recomb(array)
|
|
else:
|
|
sum = 0
|
|
for i, c in zip(array[0], x):
|
|
sum += i * c
|
|
return [sum]
|
|
|
|
self.run_unary([self.colour], recomb, fmt = noncomplex_formats)
|
|
|
|
def test_replicate(self):
|
|
for fmt in all_formats:
|
|
im = self.colour.cast(fmt)
|
|
|
|
test = im.replicate(10, 10)
|
|
self.assertEqual(test.width, self.colour.width * 10)
|
|
self.assertEqual(test.height, self.colour.height * 10)
|
|
|
|
before = im(10, 10)
|
|
after = test(10 + im.width * 2, 10 + im.width * 2)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
before = im(50, 50)
|
|
after = test(50 + im.width * 2, 50 + im.width * 2)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
def test_rot45(self):
|
|
# test has a quarter-circle in the bottom right
|
|
test = self.colour.crop(0, 0, 51, 51)
|
|
for fmt in all_formats:
|
|
im = test.cast(fmt)
|
|
|
|
im2 = im.rot45()
|
|
before = im(50, 50)
|
|
after = im2(25, 50)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
for a, b in zip(rot45_angles, rot45_angle_bonds):
|
|
im2 = im.rot45(angle = a)
|
|
after = im2.rot45(angle = b)
|
|
diff = (after - im).abs().max()
|
|
self.assertEqual(diff, 0)
|
|
|
|
def test_rot(self):
|
|
# test has a quarter-circle in the bottom right
|
|
test = self.colour.crop(0, 0, 51, 51)
|
|
for fmt in all_formats:
|
|
im = test.cast(fmt)
|
|
|
|
im2 = im.rot(Vips.Angle.D90)
|
|
before = im(50, 50)
|
|
after = im2(0, 50)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
for a, b in zip(rot_angles, rot_angle_bonds):
|
|
im2 = im.rot(a)
|
|
after = im2.rot(b)
|
|
diff = (after - im).abs().max()
|
|
self.assertEqual(diff, 0)
|
|
|
|
def test_scale(self):
|
|
for fmt in noncomplex_formats:
|
|
test = self.colour.cast(fmt)
|
|
|
|
im = test.scale()
|
|
self.assertEqual(im.max(), 255)
|
|
self.assertEqual(im.min(), 0)
|
|
|
|
im = test.scale(log = True)
|
|
self.assertEqual(im.max(), 255)
|
|
|
|
def test_subsample(self):
|
|
for fmt in all_formats:
|
|
test = self.colour.cast(fmt)
|
|
|
|
im = test.subsample(3, 3)
|
|
self.assertEqual(im.width, test.width // 3)
|
|
self.assertEqual(im.height, test.height // 3)
|
|
|
|
before = test(60, 60)
|
|
after = im(20, 20)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
def test_zoom(self):
|
|
for fmt in all_formats:
|
|
test = self.colour.cast(fmt)
|
|
|
|
im = test.zoom(3, 3)
|
|
self.assertEqual(im.width, test.width * 3)
|
|
self.assertEqual(im.height, test.height * 3)
|
|
|
|
before = test(50, 50)
|
|
after = im(150, 150)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
def test_wrap(self):
|
|
for fmt in all_formats:
|
|
test = self.colour.cast(fmt)
|
|
|
|
im = test.wrap()
|
|
self.assertEqual(im.width, test.width)
|
|
self.assertEqual(im.height, test.height)
|
|
|
|
before = test(0, 0)
|
|
after = im(50, 50)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
before = test(50, 50)
|
|
after = im(0, 0)
|
|
self.assertAlmostEqualObjects(before, after)
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|