Pillow/Tests/test_image_quantize.py
2018-01-17 22:01:37 +11:00

53 lines
1.8 KiB
Python

from helper import unittest, PillowTestCase, hopper
from PIL import Image
class TestImageQuantize(PillowTestCase):
def test_sanity(self):
image = hopper()
converted = image.quantize()
self.assert_image(converted, 'P', converted.size)
self.assert_image_similar(converted.convert('RGB'), image, 10)
image = hopper()
converted = image.quantize(palette=hopper('P'))
self.assert_image(converted, 'P', converted.size)
self.assert_image_similar(converted.convert('RGB'), image, 60)
def test_libimagequant_quantize(self):
image = hopper()
try:
converted = image.quantize(100, Image.LIBIMAGEQUANT)
except ValueError as ex:
if 'dependency' in str(ex).lower():
self.skipTest('libimagequant support not available')
else:
raise
self.assert_image(converted, 'P', converted.size)
self.assert_image_similar(converted.convert('RGB'), image, 15)
self.assertEqual(len(converted.getcolors()), 100)
def test_octree_quantize(self):
image = hopper()
converted = image.quantize(100, Image.FASTOCTREE)
self.assert_image(converted, 'P', converted.size)
self.assert_image_similar(converted.convert('RGB'), image, 20)
self.assertEqual(len(converted.getcolors()), 100)
def test_rgba_quantize(self):
image = hopper('RGBA')
image.quantize()
self.assertRaises(Exception, image.quantize, method=0)
def test_quantize(self):
image = Image.open('Tests/images/caption_6_33_22.png').convert('RGB')
converted = image.quantize()
self.assert_image(converted, 'P', converted.size)
self.assert_image_similar(converted.convert('RGB'), image, 1)
if __name__ == '__main__':
unittest.main()