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Test j2k

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hugovk 2014-04-14 13:49:29 +03:00
parent 6cd0e1757b
commit 329fd00d3f
3 changed files with 31 additions and 5 deletions
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Tests/images/rgb_trns_ycbc.j2k Normal file
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Tests/test_file_jpeg2k.py
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@ -1,7 +1,6 @@
from tester import * from tester import *
from PIL import Image from PIL import Image
from PIL import ImageFile
codecs = dir(Image.core) codecs = dir(Image.core)
@ -15,18 +14,20 @@ ignore('Not enough memory to handle tile data')
test_card = Image.open('Tests/images/test-card.png') test_card = Image.open('Tests/images/test-card.png')
test_card.load() test_card.load()
def roundtrip(im, **options): def roundtrip(im, **options):
out = BytesIO() out = BytesIO()
im.save(out, "JPEG2000", **options) im.save(out, "JPEG2000", **options)
bytes = out.tell() bytes = out.tell()
out.seek(0) out.seek(0)
im = Image.open(out) im = Image.open(out)
im.bytes = bytes # for testing only im.bytes = bytes # for testing only
im.load() im.load()
return im return im
# ---------------------------------------------------------------------- # ----------------------------------------------------------------------
def test_sanity(): def test_sanity():
# Internal version number # Internal version number
assert_match(Image.core.jp2klib_version, '\d+\.\d+\.\d+$') assert_match(Image.core.jp2klib_version, '\d+\.\d+\.\d+$')
@ -36,9 +37,10 @@ def test_sanity():
assert_equal(im.mode, 'RGB') assert_equal(im.mode, 'RGB')
assert_equal(im.size, (640, 480)) assert_equal(im.size, (640, 480))
assert_equal(im.format, 'JPEG2000') assert_equal(im.format, 'JPEG2000')
# ---------------------------------------------------------------------- # ----------------------------------------------------------------------
# These two test pre-written JPEG 2000 files that were not written with # These two test pre-written JPEG 2000 files that were not written with
# PIL (they were made using Adobe Photoshop) # PIL (they were made using Adobe Photoshop)
@ -48,6 +50,7 @@ def test_lossless():
im.save('/tmp/test-card.png') im.save('/tmp/test-card.png')
assert_image_similar(im, test_card, 1.0e-3) assert_image_similar(im, test_card, 1.0e-3)
def test_lossy_tiled(): def test_lossy_tiled():
im = Image.open('Tests/images/test-card-lossy-tiled.jp2') im = Image.open('Tests/images/test-card-lossy-tiled.jp2')
im.load() im.load()
@ -55,49 +58,58 @@ def test_lossy_tiled():
# ---------------------------------------------------------------------- # ----------------------------------------------------------------------
def test_lossless_rt(): def test_lossless_rt():
im = roundtrip(test_card) im = roundtrip(test_card)
assert_image_equal(im, test_card) assert_image_equal(im, test_card)
def test_lossy_rt(): def test_lossy_rt():
im = roundtrip(test_card, quality_layers=[20]) im = roundtrip(test_card, quality_layers=[20])
assert_image_similar(im, test_card, 2.0) assert_image_similar(im, test_card, 2.0)
def test_tiled_rt(): def test_tiled_rt():
im = roundtrip(test_card, tile_size=(128, 128)) im = roundtrip(test_card, tile_size=(128, 128))
assert_image_equal(im, test_card) assert_image_equal(im, test_card)
def test_tiled_offset_rt(): def test_tiled_offset_rt():
im = roundtrip(test_card, tile_size=(128, 128), tile_offset=(0, 0), im = roundtrip(test_card, tile_size=(128, 128), tile_offset=(0, 0),
offset=(32, 32)) offset=(32, 32))
assert_image_equal(im, test_card) assert_image_equal(im, test_card)
def test_irreversible_rt(): def test_irreversible_rt():
im = roundtrip(test_card, irreversible=True, quality_layers=[20]) im = roundtrip(test_card, irreversible=True, quality_layers=[20])
assert_image_similar(im, test_card, 2.0) assert_image_similar(im, test_card, 2.0)
def test_prog_qual_rt(): def test_prog_qual_rt():
im = roundtrip(test_card, quality_layers=[60, 40, 20], progression='LRCP') im = roundtrip(test_card, quality_layers=[60, 40, 20], progression='LRCP')
assert_image_similar(im, test_card, 2.0) assert_image_similar(im, test_card, 2.0)
def test_prog_res_rt(): def test_prog_res_rt():
im = roundtrip(test_card, num_resolutions=8, progression='RLCP') im = roundtrip(test_card, num_resolutions=8, progression='RLCP')
assert_image_equal(im, test_card) assert_image_equal(im, test_card)
# ---------------------------------------------------------------------- # ----------------------------------------------------------------------
def test_reduce(): def test_reduce():
im = Image.open('Tests/images/test-card-lossless.jp2') im = Image.open('Tests/images/test-card-lossless.jp2')
im.reduce = 2 im.reduce = 2
im.load() im.load()
assert_equal(im.size, (160, 120)) assert_equal(im.size, (160, 120))
def test_layers(): def test_layers():
out = BytesIO() out = BytesIO()
test_card.save(out, 'JPEG2000', quality_layers=[100, 50, 10], test_card.save(out, 'JPEG2000', quality_layers=[100, 50, 10],
progression='LRCP') progression='LRCP')
out.seek(0) out.seek(0)
im = Image.open(out) im = Image.open(out)
im.layers = 1 im.layers = 1
im.load() im.load()
@ -108,3 +120,17 @@ def test_layers():
im.layers = 3 im.layers = 3
im.load() im.load()
assert_image_similar(im, test_card, 0.4) assert_image_similar(im, test_card, 0.4)
def test_rgba():
# Arrange
j2k = Image.open('Tests/images/rgb_trns_ycbc.j2k')
jp2 = Image.open('Tests/images/rgb_trns_ycbc.jp2')
# Act
j2k.load()
jp2.load()
# Assert
assert_equal(j2k.mode, 'RGBA')
assert_equal(jp2.mode, 'RGBA')