Pillow/Tests/test_format_lab.py

42 lines
869 B
Python
Raw Normal View History

from tester import *
from PIL import Image
def test_white():
i = Image.open('Tests/images/lab.tif')
bits = i.load()
assert_equal(i.mode, 'LAB')
assert_equal(i.getbands(), ('L','A', 'B'))
k = i.getpixel((0,0))
assert_equal(k, (255,128,128))
L = i.getdata(0)
a = i.getdata(1)
b = i.getdata(2)
assert_equal(list(L), [255]*100)
assert_equal(list(a), [128]*100)
assert_equal(list(b), [128]*100)
def test_green():
# 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))
assert_equal(k, (128,28,128))
def test_red():
# 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))
assert_equal(k, (128,228,128))