ꦫꦣꦺꦤ꧀ꦄꦤ꧀ꦠꦱꦺꦤ

PATH: usr / share / doc / python-docs-2.7.5 / html / _sources / library

:mod:`jpeg` --- Read and write JPEG files
=========================================

.. module:: jpeg
   :platform: IRIX
   :synopsis: Read and write image files in compressed JPEG format.
   :deprecated:

.. deprecated:: 2.6
   The :mod:`jpeg` module has been removed in Python 3.

.. index:: single: Independent JPEG Group

The module :mod:`jpeg` provides access to the jpeg compressor and decompressor
written by the Independent JPEG Group (IJG). JPEG is a standard for compressing
pictures; it is defined in ISO 10918.  For details on JPEG or the Independent
JPEG Group software refer to the JPEG standard or the documentation provided
with the software.

.. index::
   single: Python Imaging Library
   single: PIL (the Python Imaging Library)
   single: Lundh, Fredrik

A portable interface to JPEG image files is available with the Python Imaging
Library (PIL) by Fredrik Lundh.  Information on PIL is available at
http://www.pythonware.com/products/pil/.

The :mod:`jpeg` module defines an exception and some functions.

.. exception:: error

Exception raised by :func:`compress` and :func:`decompress` in case of errors.

.. function:: compress(data, w, h, b)

.. index:: single: JFIF

Treat data as a pixmap of width *w* and height *h*, with *b* bytes per pixel.
   The data is in SGI GL order, so the first pixel is in the lower-left corner.
   This means that :func:`gl.lrectread` return data can immediately be passed to
   :func:`compress`. Currently only 1 byte and 4 byte pixels are allowed, the
   former being treated as greyscale and the latter as RGB color. :func:`compress`
   returns a string that contains the compressed picture, in JFIF format.

.. function:: decompress(data)

.. index:: single: JFIF

Data is a string containing a picture in JFIF format. It returns a tuple
   ``(data, width, height, bytesperpixel)``.  Again, the data is suitable to pass
   to :func:`gl.lrectwrite`.

.. function:: setoption(name, value)

Set various options.  Subsequent :func:`compress` and :func:`decompress` calls
   will use these options.  The following options are available:

.. seealso::

JPEG Still Image Data Compression Standard
      The canonical reference for the JPEG image format, by Pennebaker and Mitchell.

`Information Technology - Digital Compression and Coding of Continuous-tone Still Images - Requirements and Guidelines <http://www.w3.org/Graphics/JPEG/itu-t81.pdf>`_
      The ISO standard for JPEG is also published as ITU T.81.  This is available
      online in PDF form.

[+] ..
[-] fpformat.txt [edit]
[-] string.txt [edit]
[-] aetypes.txt [edit]
[-] textwrap.txt [edit]
[-] codecs.txt [edit]
[-] array.txt [edit]
[-] urllib2.txt [edit]
[-] pickle.txt [edit]
[-] 2to3.txt [edit]
[-] ossaudiodev.txt [edit]
[-] markup.txt [edit]
[-] sha.txt [edit]
[-] stat.txt [edit]
[-] itertools.txt [edit]
[-] numeric.txt [edit]
[-] gzip.txt [edit]
[-] pkgutil.txt [edit]
[-] subprocess.txt [edit]
[-] token.txt [edit]
[-] debug.txt [edit]
[-] dummy_thread.txt [edit]
[-] mimify.txt [edit]
[-] bastion.txt [edit]
[-] popen2.txt [edit]
[-] autogil.txt [edit]
[-] importlib.txt [edit]
[-] io.txt [edit]
[-] msilib.txt [edit]
[-] development.txt [edit]
[-] hotshot.txt [edit]
[-] constants.txt [edit]
[-] curses.ascii.txt [edit]
[-] os.txt [edit]
[-] easydialogs.txt [edit]
[-] mutex.txt [edit]
[-] md5.txt [edit]
[-] stdtypes.txt [edit]
[-] bz2.txt [edit]
[-] imgfile.txt [edit]
[-] aetools.txt [edit]
[-] internet.txt [edit]
[-] xml.dom.pulldom.txt [edit]
[-] cookie.txt [edit]
[-] sunau.txt [edit]
[-] archiving.txt [edit]
[-] modules.txt [edit]
[-] base64.txt [edit]
[-] ttk.txt [edit]
[-] tty.txt [edit]
[-] cookielib.txt [edit]
[-] pydoc.txt [edit]
[-] misc.txt [edit]
[-] fm.txt [edit]
[-] whichdb.txt [edit]
[-] imghdr.txt [edit]
[-] datatypes.txt [edit]
[-] dis.txt [edit]
[-] datetime.txt [edit]
[-] userdict.txt [edit]
[-] py_compile.txt [edit]
[-] imputil.txt [edit]
[-] xml.dom.minidom.txt [edit]
[-] multiprocessing.txt [edit]
[-] functools.txt [edit]
[-] audioop.txt [edit]
[-] language.txt [edit]
[-] miniaeframe.txt [edit]
[-] ssl.txt [edit]
[-] copy_reg.txt [edit]
[-] heapq.txt [edit]
[-] syslog.txt [edit]
[-] fileformats.txt [edit]
[-] simplexmlrpcserver.txt [edit]
[-] numbers.txt [edit]
[-] pipes.txt [edit]
[-] shutil.txt [edit]
[-] zlib.txt [edit]
[-] optparse.txt [edit]
[-] allos.txt [edit]
[-] custominterp.txt [edit]
[-] windows.txt [edit]
[-] dbm.txt [edit]
[-] select.txt [edit]
[-] time.txt [edit]
[-] index.txt [edit]
[-] undoc.txt [edit]
[-] plistlib.txt [edit]
[-] htmllib.txt [edit]
[-] warnings.txt [edit]
[-] functions.txt [edit]
[-] argparse.txt [edit]
[-] distutils.txt [edit]
[-] macpath.txt [edit]
[-] fnmatch.txt [edit]
[-] tabnanny.txt [edit]
[-] calendar.txt [edit]
[-] jpeg.txt [edit]
[-] zipimport.txt [edit]
[-] unix.txt [edit]
[-] chunk.txt [edit]
[-] smtplib.txt [edit]
[-] tokenize.txt [edit]
[-] asynchat.txt [edit]
[-] decimal.txt [edit]
[-] cd.txt [edit]
[-] pickletools.txt [edit]
[-] statvfs.txt [edit]
[-] gettext.txt [edit]
[-] sqlite3.txt [edit]
[-] imageop.txt [edit]
[-] dl.txt [edit]
[-] logging.handlers.txt [edit]
[-] zipfile.txt [edit]
[-] copy.txt [edit]
[-] sched.txt [edit]
[-] nis.txt [edit]
[-] timeit.txt [edit]
[-] weakref.txt [edit]
[-] mailbox.txt [edit]
[-] othergui.txt [edit]
[-] sgmllib.txt [edit]
[-] mimewriter.txt [edit]
[-] email.charset.txt [edit]
[-] mmap.txt [edit]
[-] xmlrpclib.txt [edit]
[-] robotparser.txt [edit]
[-] xml.sax.reader.txt [edit]
[-] hmac.txt [edit]
[-] collections.txt [edit]
[-] mimetools.txt [edit]
[-] aifc.txt [edit]
[-] modulefinder.txt [edit]
[-] socketserver.txt [edit]
[-] grp.txt [edit]
[-] getopt.txt [edit]
[-] __future__.txt [edit]
[-] binascii.txt [edit]
[-] symtable.txt [edit]
[-] crypt.txt [edit]
[-] email.encoders.txt [edit]
[-] imaplib.txt [edit]
[-] spwd.txt [edit]
[-] wsgiref.txt [edit]
[-] errno.txt [edit]
[-] email-examples.txt [edit]
[-] sun.txt [edit]
[-] doctest.txt [edit]
[-] resource.txt [edit]
[-] asyncore.txt [edit]
[-] curses.panel.txt [edit]
[-] imp.txt [edit]
[-] htmlparser.txt [edit]
[-] thread.txt [edit]
[-] posix.txt [edit]
[-] repr.txt [edit]
[-] macostools.txt [edit]
[-] colorsys.txt [edit]
[-] bdb.txt [edit]
[-] stringio.txt [edit]
[-] mm.txt [edit]
[-] cgi.txt [edit]
[-] math.txt [edit]
[-] httplib.txt [edit]
[-] urlparse.txt [edit]
[-] aepack.txt [edit]
[-] colorpicker.txt [edit]
[-] binhex.txt [edit]
[-] tk.txt [edit]
[-] xml.txt [edit]
[-] webbrowser.txt [edit]
[-] contextlib.txt [edit]
[-] types.txt [edit]
[-] shelve.txt [edit]
[-] platform.txt [edit]
[-] readline.txt [edit]
[-] locale.txt [edit]
[-] sets.txt [edit]
[-] macosa.txt [edit]
[-] bisect.txt [edit]
[-] email.parser.txt [edit]
[-] xml.sax.txt [edit]
[-] xml.etree.elementtree.txt [edit]
[-] netrc.txt [edit]
[-] new.txt [edit]
[-] bsddb.txt [edit]
[-] fl.txt [edit]
[-] curses.txt [edit]
[-] hashlib.txt [edit]
[-] tarfile.txt [edit]
[-] ftplib.txt [edit]
[-] telnetlib.txt [edit]
[-] macos.txt [edit]
[-] multifile.txt [edit]
[-] dbhash.txt [edit]
[-] netdata.txt [edit]
[-] fileinput.txt [edit]
[-] python.txt [edit]
[-] mac.txt [edit]
[-] filesys.txt [edit]
[-] scrolledtext.txt [edit]
[-] compiler.txt [edit]
[-] tkinter.txt [edit]
[-] random.txt [edit]
[-] mailcap.txt [edit]
[-] fpectl.txt [edit]
[-] fcntl.txt [edit]
[-] ipc.txt [edit]
[-] formatter.txt [edit]
[-] profile.txt [edit]
[-] xml.dom.txt [edit]
[-] email.iterators.txt [edit]
[-] logging.config.txt [edit]
[-] rlcompleter.txt [edit]
[-] idle.txt [edit]
[-] gdbm.txt [edit]
[-] ast.txt [edit]
[-] someos.txt [edit]
[-] cmd.txt [edit]
[-] re.txt [edit]
[-] docxmlrpcserver.txt [edit]
[-] pdb.txt [edit]
[-] rexec.txt [edit]
[-] commands.txt [edit]
[-] restricted.txt [edit]
[-] crypto.txt [edit]
[-] dumbdbm.txt [edit]
[-] email.txt [edit]
[-] linecache.txt [edit]
[-] os.path.txt [edit]
[-] cgitb.txt [edit]
[-] _winreg.txt [edit]
[-] carbon.txt [edit]
[-] turtle.txt [edit]
[-] xml.sax.handler.txt [edit]
[-] json.txt [edit]
[-] email.generator.txt [edit]
[-] struct.txt [edit]
[-] mhlib.txt [edit]
[-] uuid.txt [edit]
[-] threading.txt [edit]
[-] mimetypes.txt [edit]
[-] traceback.txt [edit]
[-] filecmp.txt [edit]
[-] sndhdr.txt [edit]
[-] logging.txt [edit]
[-] getpass.txt [edit]
[-] dummy_threading.txt [edit]
[-] abc.txt [edit]
[-] shlex.txt [edit]
[-] email.mime.txt [edit]
[-] fractions.txt [edit]
[-] email.header.txt [edit]
[-] marshal.txt [edit]
[-] symbol.txt [edit]
[-] wave.txt [edit]
[-] urllib.txt [edit]
[-] queue.txt [edit]
[-] operator.txt [edit]
[-] compileall.txt [edit]
[-] sysconfig.txt [edit]
[-] quopri.txt [edit]
[-] inspect.txt [edit]
[-] xdrlib.txt [edit]
[-] __builtin__.txt [edit]
[-] ic.txt [edit]
[-] signal.txt [edit]
[-] dircache.txt [edit]
[-] rfc822.txt [edit]
[-] glob.txt [edit]
[-] stringprep.txt [edit]
[-] tix.txt [edit]
[-] i18n.txt [edit]
[-] email.util.txt [edit]
[-] anydbm.txt [edit]
[-] code.txt [edit]
[-] __main__.txt [edit]
[-] difflib.txt [edit]
[-] unicodedata.txt [edit]
[-] sunaudio.txt [edit]
[-] msvcrt.txt [edit]
[-] site.txt [edit]
[-] codeop.txt [edit]
[-] uu.txt [edit]
[-] winsound.txt [edit]
[-] smtpd.txt [edit]
[-] al.txt [edit]
[-] user.txt [edit]
[-] poplib.txt [edit]
[-] nntplib.txt [edit]
[-] keyword.txt [edit]
[-] ctypes.txt [edit]
[-] socket.txt [edit]
[-] simplehttpserver.txt [edit]
[-] sys.txt [edit]
[-] pyexpat.txt [edit]
[-] configparser.txt [edit]
[-] persistence.txt [edit]
[-] trace.txt [edit]
[-] runpy.txt [edit]
[-] csv.txt [edit]
[-] test.txt [edit]
[-] framework.txt [edit]
[-] gc.txt [edit]
[-] cmath.txt [edit]
[-] exceptions.txt [edit]
[-] pyclbr.txt [edit]
[-] sgi.txt [edit]
[-] parser.txt [edit]
[-] future_builtins.txt [edit]
[-] pwd.txt [edit]
[-] strings.txt [edit]
[-] frameworks.txt [edit]
[-] email.message.txt [edit]
[-] cgihttpserver.txt [edit]
[-] intro.txt [edit]
[-] email.errors.txt [edit]
[-] pprint.txt [edit]
[-] pty.txt [edit]
[-] xml.sax.utils.txt [edit]
[-] posixfile.txt [edit]
[-] tempfile.txt [edit]
[-] termios.txt [edit]
[-] gl.txt [edit]
[-] gensuitemodule.txt [edit]
[-] atexit.txt [edit]
[-] basehttpserver.txt [edit]
[-] unittest.txt [edit]