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0b3036454c
Currently gives None for a 16 bit greyscale image rather than the true min and max values in the 0-65536 range. The internal ImagingGetProjection function already supports I;16 but the _getextrema needs to know to unpack the result.
34 lines
1.0 KiB
Python
34 lines
1.0 KiB
Python
from PIL import Image
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from helper import unittest, PillowTestCase, hopper
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class TestImageGetExtrema(PillowTestCase):
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def test_extrema(self):
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def extrema(mode):
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return hopper(mode).getextrema()
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self.assertEqual(extrema("1"), (0, 255))
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self.assertEqual(extrema("L"), (0, 255))
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self.assertEqual(extrema("I"), (0, 255))
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self.assertEqual(extrema("F"), (0, 255))
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self.assertEqual(extrema("P"), (0, 225)) # fixed palette
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self.assertEqual(
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extrema("RGB"), ((0, 255), (0, 255), (0, 255)))
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self.assertEqual(
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extrema("RGBA"), ((0, 255), (0, 255), (0, 255), (255, 255)))
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self.assertEqual(
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extrema("CMYK"), (((0, 255), (0, 255), (0, 255), (0, 0))))
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self.assertEqual(extrema("I;16"), (0, 255))
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def test_true_16(self):
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im = Image.open("Tests/images/16_bit_noise.tif")
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self.assertEqual(im.mode, 'I;16')
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extrema = im.getextrema()
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self.assertEqual(extrema, (106, 285))
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if __name__ == '__main__':
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unittest.main()
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