Pillow/Tests/test_imagecms.py
2016-03-05 04:40:24 +01:00

316 lines
13 KiB
Python

from helper import unittest, PillowTestCase, hopper
import datetime
from PIL import Image
from io import BytesIO
import os
try:
from PIL import ImageCms
from PIL.ImageCms import ImageCmsProfile
ImageCms.core.profile_open
except ImportError as v:
# Skipped via setUp()
pass
SRGB = "Tests/icc/sRGB_IEC61966-2-1_black_scaled.icc"
HAVE_PROFILE = os.path.exists(SRGB)
class TestImageCms(PillowTestCase):
def setUp(self):
try:
from PIL import ImageCms
# need to hit getattr to trigger the delayed import error
ImageCms.core.profile_open
except ImportError as v:
self.skipTest(v)
def skip_missing(self):
if not HAVE_PROFILE:
self.skipTest("SRGB profile not available")
def test_sanity(self):
# basic smoke test.
# this mostly follows the cms_test outline.
v = ImageCms.versions() # should return four strings
self.assertEqual(v[0], '1.0.0 pil')
self.assertEqual(list(map(type, v)), [str, str, str, str])
# internal version number
self.assertRegexpMatches(ImageCms.core.littlecms_version, "\d+\.\d+$")
self.skip_missing()
i = ImageCms.profileToProfile(hopper(), SRGB, SRGB)
self.assert_image(i, "RGB", (128, 128))
i = hopper()
ImageCms.profileToProfile(i, SRGB, SRGB, inPlace=True)
self.assert_image(i, "RGB", (128, 128))
t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB")
i = ImageCms.applyTransform(hopper(), t)
self.assert_image(i, "RGB", (128, 128))
i = hopper()
t = ImageCms.buildTransform(SRGB, SRGB, "RGB", "RGB")
ImageCms.applyTransform(hopper(), t, inPlace=True)
self.assert_image(i, "RGB", (128, 128))
p = ImageCms.createProfile("sRGB")
o = ImageCms.getOpenProfile(SRGB)
t = ImageCms.buildTransformFromOpenProfiles(p, o, "RGB", "RGB")
i = ImageCms.applyTransform(hopper(), t)
self.assert_image(i, "RGB", (128, 128))
t = ImageCms.buildProofTransform(SRGB, SRGB, SRGB, "RGB", "RGB")
self.assertEqual(t.inputMode, "RGB")
self.assertEqual(t.outputMode, "RGB")
i = ImageCms.applyTransform(hopper(), t)
self.assert_image(i, "RGB", (128, 128))
# test PointTransform convenience API
hopper().point(t)
def test_name(self):
self.skip_missing()
# get profile information for file
self.assertEqual(
ImageCms.getProfileName(SRGB).strip(),
'IEC 61966-2-1 Default RGB Colour Space - sRGB')
def test_info(self):
self.skip_missing()
self.assertEqual(
ImageCms.getProfileInfo(SRGB).splitlines(), [
'sRGB IEC61966-2-1 black scaled', '',
'Copyright International Color Consortium, 2009', ''])
def test_copyright(self):
self.skip_missing()
self.assertEqual(
ImageCms.getProfileCopyright(SRGB).strip(),
'Copyright International Color Consortium, 2009')
def test_manufacturer(self):
self.skip_missing()
self.assertEqual(
ImageCms.getProfileManufacturer(SRGB).strip(),
'')
def test_model(self):
self.skip_missing()
self.assertEqual(
ImageCms.getProfileModel(SRGB).strip(),
'IEC 61966-2-1 Default RGB Colour Space - sRGB')
def test_description(self):
self.skip_missing()
self.assertEqual(
ImageCms.getProfileDescription(SRGB).strip(),
'sRGB IEC61966-2-1 black scaled')
def test_intent(self):
self.skip_missing()
self.assertEqual(ImageCms.getDefaultIntent(SRGB), 0)
self.assertEqual(ImageCms.isIntentSupported(
SRGB, ImageCms.INTENT_ABSOLUTE_COLORIMETRIC,
ImageCms.DIRECTION_INPUT), 1)
def test_profile_object(self):
# same, using profile object
p = ImageCms.createProfile("sRGB")
# self.assertEqual(ImageCms.getProfileName(p).strip(),
# 'sRGB built-in - (lcms internal)')
# self.assertEqual(ImageCms.getProfileInfo(p).splitlines(),
# ['sRGB built-in', '', 'WhitePoint : D65 (daylight)', '', ''])
self.assertEqual(ImageCms.getDefaultIntent(p), 0)
self.assertEqual(ImageCms.isIntentSupported(
p, ImageCms.INTENT_ABSOLUTE_COLORIMETRIC,
ImageCms.DIRECTION_INPUT), 1)
def test_extensions(self):
# extensions
i = Image.open("Tests/images/rgb.jpg")
p = ImageCms.getOpenProfile(BytesIO(i.info["icc_profile"]))
self.assertEqual(
ImageCms.getProfileName(p).strip(),
'IEC 61966-2.1 Default RGB colour space - sRGB')
def test_exceptions(self):
# the procedural pyCMS API uses PyCMSError for all sorts of errors
self.assertRaises(
ImageCms.PyCMSError,
lambda: ImageCms.profileToProfile(hopper(), "foo", "bar"))
self.assertRaises(
ImageCms.PyCMSError,
lambda: ImageCms.buildTransform("foo", "bar", "RGB", "RGB"))
self.assertRaises(
ImageCms.PyCMSError,
lambda: ImageCms.getProfileName(None))
self.skip_missing()
self.assertRaises(
ImageCms.PyCMSError,
lambda: ImageCms.isIntentSupported(SRGB, None, None))
def test_display_profile(self):
# try fetching the profile for the current display device
ImageCms.get_display_profile()
def test_lab_color_profile(self):
ImageCms.createProfile("LAB", 5000)
ImageCms.createProfile("LAB", 6500)
def test_simple_lab(self):
i = Image.new('RGB', (10, 10), (128, 128, 128))
psRGB = ImageCms.createProfile("sRGB")
pLab = ImageCms.createProfile("LAB")
t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB")
i_lab = ImageCms.applyTransform(i, t)
self.assertEqual(i_lab.mode, 'LAB')
k = i_lab.getpixel((0, 0))
# not a linear luminance map. so L != 128:
self.assertEqual(k, (137, 128, 128))
l = i_lab.getdata(0)
a = i_lab.getdata(1)
b = i_lab.getdata(2)
self.assertEqual(list(l), [137] * 100)
self.assertEqual(list(a), [128] * 100)
self.assertEqual(list(b), [128] * 100)
def test_lab_color(self):
psRGB = ImageCms.createProfile("sRGB")
pLab = ImageCms.createProfile("LAB")
t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB")
# Need to add a type mapping for some PIL type to TYPE_Lab_8 in
# findLCMSType, and have that mapping work back to a PIL mode
# (likely RGB).
i = ImageCms.applyTransform(hopper(), t)
self.assert_image(i, "LAB", (128, 128))
# i.save('temp.lab.tif') # visually verified vs PS.
target = Image.open('Tests/images/hopper.Lab.tif')
self.assert_image_similar(i, target, 30)
def test_lab_srgb(self):
psRGB = ImageCms.createProfile("sRGB")
pLab = ImageCms.createProfile("LAB")
t = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB")
img = Image.open('Tests/images/hopper.Lab.tif')
img_srgb = ImageCms.applyTransform(img, t)
# img_srgb.save('temp.srgb.tif') # visually verified vs ps.
self.assert_image_similar(hopper(), img_srgb, 30)
self.assertTrue(img_srgb.info['icc_profile'])
profile = ImageCmsProfile(BytesIO(img_srgb.info['icc_profile']))
self.assertTrue('sRGB' in ImageCms.getProfileDescription(profile))
def test_lab_roundtrip(self):
# check to see if we're at least internally consistent.
psRGB = ImageCms.createProfile("sRGB")
pLab = ImageCms.createProfile("LAB")
t = ImageCms.buildTransform(psRGB, pLab, "RGB", "LAB")
t2 = ImageCms.buildTransform(pLab, psRGB, "LAB", "RGB")
i = ImageCms.applyTransform(hopper(), t)
self.assertEqual(i.info['icc_profile'],
ImageCmsProfile(pLab).tobytes())
out = ImageCms.applyTransform(i, t2)
self.assert_image_similar(hopper(), out, 2)
def test_profile_tobytes(self):
i = Image.open("Tests/images/rgb.jpg")
p = ImageCms.getOpenProfile(BytesIO(i.info["icc_profile"]))
p2 = ImageCms.getOpenProfile(BytesIO(p.tobytes()))
# not the same bytes as the original icc_profile,
# but it does roundtrip
self.assertEqual(p.tobytes(), p2.tobytes())
self.assertEqual(ImageCms.getProfileName(p),
ImageCms.getProfileName(p2))
self.assertEqual(ImageCms.getProfileDescription(p),
ImageCms.getProfileDescription(p2))
def test_extended_information(self):
o = ImageCms.getOpenProfile(SRGB)
p = o.profile
self.assertEqual(p.attributes, 4294967296)
self.assertEqual(p.blue_colorant, ((0.14306640625, 0.06060791015625, 0.7140960693359375), (0.1558847490315394, 0.06603820639433387, 0.06060791015625)))
self.assertEqual(p.blue_primary, ((0.14306641366715667, 0.06060790921083026, 0.7140960805782015), (0.15588475410450106, 0.06603820408959558, 0.06060790921083026)))
self.assertEqual(p.chromatic_adaptation, (((1.04791259765625, 0.0229339599609375, -0.050201416015625), (0.02960205078125, 0.9904632568359375, -0.0170745849609375), (-0.009246826171875, 0.0150604248046875, 0.7517852783203125)), ((1.0267159024652783, 0.022470062342089134, 0.0229339599609375), (0.02951378324103937, 0.9875098886387147, 0.9904632568359375), (-0.012205438066465256, 0.01987915407854985, 0.0150604248046875))))
self.assertEqual(p.chromaticity, None)
self.assertEqual(p.clut, {0: (False, False, True), 1: (False, False, True), 2: (False, False, True), 3: (False, False, True)})
self.assertEqual(p.color_space, 'RGB')
self.assertEqual(p.colorant_table, None)
self.assertEqual(p.colorant_table_out, None)
self.assertEqual(p.colorimetric_intent, None)
self.assertEqual(p.connection_space, 'XYZ ')
self.assertEqual(p.copyright, 'Copyright International Color Consortium, 2009')
self.assertEqual(p.creation_date, datetime.datetime(2009, 2, 27, 21, 36, 31))
self.assertEqual(p.device_class, 'mntr')
self.assertEqual(p.green_colorant, ((0.3851470947265625, 0.7168731689453125, 0.097076416015625), (0.32119769927720654, 0.5978443449048152, 0.7168731689453125)))
self.assertEqual(p.green_primary, ((0.3851470888162112, 0.7168731974161346, 0.09707641738998518), (0.32119768793686687, 0.5978443567149709, 0.7168731974161346)))
self.assertEqual(p.header_flags, 0)
self.assertEqual(p.header_manufacturer, '\x00\x00\x00\x00')
self.assertEqual(p.header_model, '\x00\x00\x00\x00')
self.assertEqual(p.icc_measurement_condition, {'backing': (0.0, 0.0, 0.0), 'flare': 0.0, 'geo': 'unknown', 'observer': 1, 'illuminant_type': 'D65'})
self.assertEqual(p.icc_version, 33554432)
self.assertEqual(p.icc_viewing_condition, None)
self.assertEqual(p.intent_supported, {0: (True, True, True), 1: (True, True, True), 2: (True, True, True), 3: (True, True, True)})
self.assertEqual(p.is_matrix_shaper, True)
self.assertEqual(p.luminance, ((0.0, 80.0, 0.0), (0.0, 1.0, 80.0)))
self.assertEqual(p.manufacturer, None)
self.assertEqual(p.media_black_point, ((0.012054443359375, 0.0124969482421875, 0.01031494140625), (0.34573304157549234, 0.35842450765864337, 0.0124969482421875)))
self.assertEqual(p.media_white_point, ((0.964202880859375, 1.0, 0.8249053955078125), (0.3457029219802284, 0.3585375327567059, 1.0)))
self.assertEqual(p.media_white_point_temperature, 5000.722328847392)
self.assertEqual(p.model, 'IEC 61966-2-1 Default RGB Colour Space - sRGB')
self.assertEqual(p.pcs, 'XYZ')
self.assertEqual(p.perceptual_rendering_intent_gamut, None)
self.assertEqual(p.product_copyright, 'Copyright International Color Consortium, 2009')
self.assertEqual(p.product_desc, 'sRGB IEC61966-2-1 black scaled')
self.assertEqual(p.product_description, 'sRGB IEC61966-2-1 black scaled')
self.assertEqual(p.product_manufacturer, '')
self.assertEqual(p.product_model, 'IEC 61966-2-1 Default RGB Colour Space - sRGB')
self.assertEqual(p.profile_description, 'sRGB IEC61966-2-1 black scaled')
self.assertEqual(p.profile_id, b')\xf8=\xde\xaf\xf2U\xaexB\xfa\xe4\xca\x839\r')
self.assertEqual(p.red_colorant, ((0.436065673828125, 0.2224884033203125, 0.013916015625), (0.6484536316398539, 0.3308524880306778, 0.2224884033203125)))
self.assertEqual(p.red_primary, ((0.43606566581047446, 0.22248840582960838, 0.013916015621759925), (0.6484536250319214, 0.3308524944738204, 0.22248840582960838)))
self.assertEqual(p.rendering_intent, 0)
self.assertEqual(p.saturation_rendering_intent_gamut, None)
self.assertEqual(p.screening_description, None)
self.assertEqual(p.target, None)
self.assertEqual(p.technology, 'CRT ')
self.assertEqual(p.version, 2.0)
self.assertEqual(p.viewing_condition, 'Reference Viewing Condition in IEC 61966-2-1')
self.assertEqual(p.xcolor_space, 'RGB ')
if __name__ == '__main__':
unittest.main()
# End of file