
The Certified For Windows Vista logo, Windows Media and the Windows logo are trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries.
Content providers are using the digital rights management technology for Windows Media contained in this device (WMDRM) to protect the integrity of their content (Secure Content) so that their intellectual property, including copyright, in such content is not misappropriated.
This device uses
If the security of the
download a license for Secure Content from the Internet or from a PC. Microsoft may, in conjunction with such license, also download revocation list onto your device on behalf of Secure Content Owners.
Note concernant Windows Media DRMLe logo Certified For Windows Vista logo, Windows Media et le logo Windows sont des marques commerciales ou des marques déposées de Microsoft Corporation aux
Les fournisseurs de contenu ont recours à la technologie de gestion des droits numériques pour Windows Media
Information about software
This product uses the following software.For information (copyright, etc) about each software, read the original sentences stated below.
■About The Independent JPEG Group’s JPEG software
The Independent JPEG Group’s JPEG software
README for release 6b of
This distribution contains the sixth public release of the Independent JPEG Group’s free JPEG software. You are welcome to redistribute this software and to use it for any purpose, subject to the conditions under LEGAL ISSUES, below.
Serious users of this software (particularly those incorporating it into larger programs) should contact IJG at
This software is the work of Tom Lane, Philip Gladstone, Jim Boucher, Lee Crocker, Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi, Guido Vollbeding, Ge’ Weijers, and other members of the Independent JPEG Group.
IJG is not affiliated with the official ISO JPEG standards committee.
DOCUMENTATION ROADMAP
This file contains the following sections:
OVERVIEW | General description of JPEG and the IJG software. |
LEGAL ISSUES | Copyright, lack of warranty, terms of distribution. |
REFERENCES | Where to learn more about JPEG. |
ARCHIVE LOCATIONS | Where to find newer versions of this software. |
RELATED SOFTWARE | Other stuff you should get. |
FILE FORMAT WARS | Software *not* to get. |
TO DO | Plans for future IJG releases. |
Other documentation files in the distribution are:
User documentation: |
|
install.doc | How to configure and install the IJG software. |
usage.doc | Usage instructions for cjpeg, djpeg, jpegtran, rdjpgcom, |
| and wrjpgcom. |
*.1 | |
| usage.doc). |
wizard.doc | Advanced usage instructions for JPEG wizards only. |
change.log |
Programmer and internal documentation:
libjpeg.doc | How to use the JPEG library in your own programs. |
example.c | Sample code for calling the JPEG library. |
structure.doc | Overview of the JPEG library’s internal structure. |
filelist.doc | Road map of IJG files. |
coderules.doc | Coding style rules |
Please read at least the files install.doc and usage.doc. Useful information can also be
found in the JPEG FAQ (Frequently Asked Questions) article. See ARCHIVE LOCATIONS below to find out where to obtain the FAQ article.
If you want to understand how the JPEG code works, we suggest reading one or more of the REFERENCES, then looking at the documentation files (in roughly the order listed) before diving into the code.
OVERVIEW
This package contains C software to implement JPEG image compression and decompression. JPEG (pronounced
This software implements JPEG baseline,
We provide a set of library routines for reading and writing JPEG image files, plus two sample applications “cjpeg” and “djpeg”, which use the library to perform conversion between JPEG and some other popular image file formats. The library is intended to be reused in other applications.
In order to support file conversion and viewing software, we have included considerable functionality beyond the bare JPEG coding/decoding capability; for example, the color quantization modules are not strictly part of JPEG decoding, but they are essential for output to colormapped file formats or colormapped displays. These extra functions can be compiled out of the library if not required for a particular application. We have also included “jpegtran”, a utility for lossless transcoding between different JPEG processes, and “rdjpgcom” and “wrjpgcom”, two simple applications for inserting and extracting textual comments in JFIF files.
The emphasis in designing this software has been on achieving portability and flexibility, while also making it fast enough to be useful. In particular, the software is not intended to be read as a tutorial on JPEG. (See the REFERENCES section for introductory material.) Rather, it is intended to be reliable, portable,
We welcome the use of this software as a component of commercial products. No royalty is required, but we do ask for an acknowledgement in product documentation, as described under LEGAL ISSUES.
LEGAL ISSUES
In plain English:
11