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