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40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
from PIL import Image
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from .helper import PillowTestCase
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class TestFormatLab(PillowTestCase):
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def test_white(self):
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with Image.open("Tests/images/lab.tif") as i:
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i.load()
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self.assertEqual(i.mode, "LAB")
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self.assertEqual(i.getbands(), ("L", "A", "B"))
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k = i.getpixel((0, 0))
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L = i.getdata(0)
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a = i.getdata(1)
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b = i.getdata(2)
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self.assertEqual(k, (255, 128, 128))
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self.assertEqual(list(L), [255] * 100)
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self.assertEqual(list(a), [128] * 100)
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self.assertEqual(list(b), [128] * 100)
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def test_green(self):
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# l= 50 (/100), a = -100 (-128 .. 128) b=0 in PS
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# == RGB: 0, 152, 117
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with Image.open("Tests/images/lab-green.tif") as i:
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k = i.getpixel((0, 0))
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self.assertEqual(k, (128, 28, 128))
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def test_red(self):
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# l= 50 (/100), a = 100 (-128 .. 128) b=0 in PS
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# == RGB: 255, 0, 124
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with Image.open("Tests/images/lab-red.tif") as i:
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k = i.getpixel((0, 0))
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self.assertEqual(k, (128, 228, 128))
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