本文整理汇总了Python中PIL.PngImagePlugin.PngInfo方法的典型用法代码示例。如果您正苦于以下问题：Python PngImagePlugin.PngInfo方法的具体用法？Python PngImagePlugin.PngInfo怎么用？Python PngImagePlugin.PngInfo使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PIL.PngImagePlugin的用法示例。
在下文中一共展示了PngImagePlugin.PngInfo方法的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_dos_total_memory
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def test_dos_total_memory(self):
im = Image.new('L', (1, 1))
compressed_data = zlib.compress(b'a'*1024*1023)
info = PngImagePlugin.PngInfo()
for x in range(64):
info.add_text('t%s' % x, compressed_data, zip=True)
info.add_itxt('i%s' % x, compressed_data, zip=True)
b = BytesIO()
im.save(b, 'PNG', pnginfo=info)
b.seek(0)
try:
im2 = Image.open(b)
except ValueError as msg:
self.assertIn("Too much memory", msg)
return
total_len = 0
for txt in im2.text.values():
total_len += len(txt)
self.assertLess(total_len, 64*1024*1024,
"Total text chunks greater than 64M") 示例2: test_roundtrip_itxt
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def test_roundtrip_itxt(self):
# Check iTXt roundtripping
im = Image.new("RGB", (32, 32))
info = PngImagePlugin.PngInfo()
info.add_itxt("spam", "Eggs", "en", "Spam")
info.add_text("eggs", PngImagePlugin.iTXt("Spam", "en", "Eggs"),
zip=True)
im = roundtrip(im, pnginfo=info)
self.assertEqual(im.info, {"spam": "Eggs", "eggs": "Spam"})
self.assertEqual(im.text, {"spam": "Eggs", "eggs": "Spam"})
self.assertEqual(im.text["spam"].lang, "en")
self.assertEqual(im.text["spam"].tkey, "Spam")
self.assertEqual(im.text["eggs"].lang, "en")
self.assertEqual(im.text["eggs"].tkey, "Eggs") 示例3: test_unicode_text
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def test_unicode_text(self):
# Check preservation of non-ASCII characters on Python 3
# This cannot really be meaningfully tested on Python 2,
# since it didn't preserve charsets to begin with.
def rt_text(value):
im = Image.new("RGB", (32, 32))
info = PngImagePlugin.PngInfo()
info.add_text("Text", value)
im = roundtrip(im, pnginfo=info)
self.assertEqual(im.info, {"Text": value})
if py3:
rt_text(" Aa" + chr(0xa0) + chr(0xc4) + chr(0xff)) # Latin1
rt_text(chr(0x400) + chr(0x472) + chr(0x4ff)) # Cyrillic
rt_text(chr(0x4e00) + chr(0x66f0) + # CJK
chr(0x9fba) + chr(0x3042) + chr(0xac00))
rt_text("A" + chr(0xc4) + chr(0x472) + chr(0x3042)) # Combined 示例4: test_roundtrip_text
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def test_roundtrip_text(self):
# Check text roundtripping
im = Image.open(TEST_PNG_FILE)
info = PngImagePlugin.PngInfo()
info.add_text("TXT", "VALUE")
info.add_text("ZIP", "VALUE", zip=True)
im = roundtrip(im, pnginfo=info)
self.assertEqual(im.info, {'TXT': 'VALUE', 'ZIP': 'VALUE'})
self.assertEqual(im.text, {'TXT': 'VALUE', 'ZIP': 'VALUE'}) 示例5: test_nonunicode_text
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def test_nonunicode_text(self):
# Check so that non-Unicode text is saved as a tEXt rather than iTXt
im = Image.new("RGB", (32, 32))
info = PngImagePlugin.PngInfo()
info.add_text("Text", "Ascii")
im = roundtrip(im, pnginfo=info)
self.assertIsInstance(im.info["Text"], str) 示例6: pngsave
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def pngsave(A, file, info={}):
"""
wrapper around PIL 1.1.7 Image.save to preserve PNG metadata
based on public domain script by Nick Galbreath
http://blog.modp.com/2007/08/python-pil-and-png-metadata-take-2.html
"""
from PIL import Image, PngImagePlugin
im = Image.fromarray(256.0*A).convert('RGB')
reserved = ('interlace', 'gamma', 'dpi', 'transparency', 'aspect')
meta = PngImagePlugin.PngInfo()
for k,v in _iteritems(info):
if k in reserved: continue
meta.add_text(k, v, 0)
im.save(file, "PNG", pnginfo=meta) 示例7: png_client
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def png_client(images,info={},port=10000,host='localhost',compress_level=0,resize=(1.0,1.0)):
if len(images.shape) == 2:
images = [images]
# Create a TCP/IP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# Connect the socket to the port where the server is listening
server_address = (host, port)
sock.connect(server_address)
try:
for A in images:
im = Image.fromarray(256.0*A).convert('RGB')
if resize != (1.0,1.0) and resize is not None:
if not type(resize) == tuple:
resize = (resize,resize)
im = im.resize((int(resize[0]*im.size[0]), int(resize[1]*im.size[1])), PIL.Image.ANTIALIAS)
output = StringIO.StringIO()
meta = PngImagePlugin.PngInfo()
reserved = ('interlace', 'gamma', 'dpi', 'transparency', 'aspect')
for k,v in _iteritems(info):
if k in reserved:
continue
meta.add_text(str(k), str(v), 0)
im.save(output, format="PNG", pnginfo=meta, compress_level=compress_level)
message = output.getvalue()
output.close()
sock.sendall(message)
finally:
sock.close() 示例8: save_png_with_metadata
# 需要导入模块: from PIL import PngImagePlugin [as 别名]
# 或者: from PIL.PngImagePlugin import PngInfo [as 别名]
def save_png_with_metadata(fig, filename, fig_kwds, kwds):
""" Save a matplotlib figure to a png with metadata
"""
from PIL import Image, PngImagePlugin
fig.savefig(filename, **fig_kwds)
im = Image.open(filename)
meta = PngImagePlugin.PngInfo()
for key in kwds:
meta.add_text(str(key), str(kwds[key]))
im.save(filename, "png", pnginfo=meta)