The Independent JPEG Group's JPEG software
==========================================
README for release 6b of 27-Mar-1998
====================================
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 jpeg-info@uunet.uu.net to be added to
our electronic mailing list. Mailing list members are notified of updates
and have a chance to participate in technical discussions, etc.
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 Unix-style man pages for programs (same info as usage.doc).
wizard.doc Advanced usage instructions for JPEG wizards only.
change.log Version-to-version change highlights.
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 if you contribute code.
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 "jay-peg") is a standardized compression
method for full-color and gray-scale images. JPEG is intended for compressing
"real-world" scenes; line drawings, cartoons and other non-realistic images
are not its strong suit. JPEG is lossy, meaning that the output image is not
exactly identical to the input image. Hence you must not use JPEG if you
have to have identical output bits. However, on typical photographic images,
very good compression levels can be obtained with no visible change, and
remarkably high compression levels are possible if you can tolerate a
low-quality image. For more details, see the references, or just experiment
with various compression settings.
This software implements JPEG baseline, extended-sequential, and progressive
compression processes. Provision is made for supporting all variants of these
processes, although some uncommon parameter settings aren't implemented yet.
For legal reasons, we are not distributing code for the arithmetic-coding
variants of JPEG; see LEGAL ISSUES. We have made no provision for supporting
the hierarchical or lossless processes defined in the standard.
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, industrial-strength code. We do not claim to have
achieved that goal in every aspect of the software, but we strive for it.
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:
1. We don't promise that this software works. (But if you find any bugs,
please let us know!)
2. You can use this software for whatever you want. You don't have to pay us.
3. You may not pretend that you wrote this software. If you use it in a
program, you must acknowledge somewhere in your documentation that
you've used the IJG code.
In legalese:
The authors make NO WARRANTY or representation, either express or implied,
with respect to this software, its quality, accuracy, merchantability, or
fitness for a particular purpose. This software is provided "AS IS", and you,
its user, assume the entire risk as to its quality and accuracy.
This software is copyright (C) 1991-1998, Thomas G. Lane.
All Rights Reserved except as specified below.
Permission is hereby granted to use, copy, modify, and distribute this
software (or portions thereof) for any purpose, without fee, subject to these
conditions:
(1) If any part of the source code for this software is distributed, then this
README file must be included, with this copyright and no-warranty notice
unaltered; and any additions, deletions, or changes to the original files
must be clearly indicated in accompanying documentation.
(2) If only executable code is distributed, then the accompanying
documentation must state that "this software is based in part on the work of
the Independent JPEG Group".
(3) Permission for use of this software is granted only if the user accepts
full responsibility for any undesirable consequences; the authors accept
NO LIABILITY for damages of any kind.
These conditions apply to any software derived from or based on the IJG code,
not just to the unmodified library. If you use our work, you ought to
acknowledge us.
Permission is NOT granted for the use of any IJG author's name or company name
in advertising or publicity relating to this software or products derived from
it. This software may be referred to only as "the Independent JPEG Group's
software".
We specifically permit and encourage the use of this software as the basis of
commercial products, provided that all warranty or liability claims are
assumed by the product vendor.
ansi2knr.c is included in this distribution by permission of
没有合适的资源?快使用搜索试试~ 我知道了~
温馨提示
CxImage is a C++ class to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images。目前我知道的,开发源码中最好的图像处理工具。
资源推荐
资源详情
资源评论
收起资源包目录
CxImage库资源 (486个子文件)
ANNOUNCE 1KB
ico2.bin 2KB
bg.bmp 3KB
Toolbar.bmp 3KB
toolbar1.bmp 2KB
pnggccrd.c 234KB
pngrtran.c 143KB
pngvcrd.c 143KB
pngrutil.c 91KB
jbig.c 91KB
tif_ojpeg.c 83KB
pngwutil.c 82KB
fax3sm_winnt.c 79KB
jpc_enc.c 72KB
tif_getimage.c 64KB
jpc_dec.c 62KB
deflate.c 55KB
jas_icc.c 50KB
jquant2.c 49KB
jpc_cs.c 48KB
pngwrite.c 48KB
pngread.c 46KB
inflate.c 46KB
pngpread.c 45KB
trees.c 44KB
tif_fax3.c 42KB
jdmarker.c 42KB
jmemmgr.c 41KB
tif_jpeg.c 41KB
jas_image.c 40KB
tif_luv.c 39KB
tif_dirread.c 38KB
pngset.c 37KB
jas_cm.c 37KB
tif_dir.c 36KB
tif_pixarlog.c 35KB
jpc_qmfb.c 33KB
jas_stream.c 32KB
jquant1.c 31KB
gzio.c 31KB
tif_dirwrite.c 30KB
jchuff.c 28KB
jpc_t1enc.c 28KB
jpc_t1dec.c 28KB
jas_iccdata.c 28KB
tif_lzw.c 27KB
pngget.c 26KB
jp2_cod.c 26KB
tcd.c 26KB
jbig_tab.c 25KB
jcphuff.c 25KB
jdcoefct.c 25KB
t1.c 24KB
png.c 23KB
jdhuff.c 23KB
infback.c 22KB
j2k.c 22KB
jpc_t2cod.c 22KB
jcparam.c 21KB
mif_cod.c 21KB
jdphuff.c 21KB
jdmainct.c 20KB
jpc_t2enc.c 20KB
jpc_tsfb.c 20KB
pngtrans.c 20KB
jcmaster.c 20KB
jdmaster.c 20KB
tif_write.c 20KB
jp2_dec.c 19KB
jcsample.c 19KB
jpc_t2dec.c 19KB
tif_read.c 18KB
jcmarker.c 17KB
pngwtran.c 17KB
jdsample.c 16KB
jccoefct.c 16KB
tif_print.c 16KB
pnm_dec.c 16KB
pnm_enc.c 16KB
pngmem.c 16KB
jpc_bs.c 16KB
tif_dirinfo.c 16KB
bmp_dec.c 16KB
jpg_enc.c 15KB
jccolor.c 15KB
jidctint.c 15KB
jpc_t1cod.c 15KB
tstcodec.c 15KB
jp2_enc.c 14KB
bmp_enc.c 14KB
jas_seq.c 14KB
jpc_mqenc.c 14KB
jctrans.c 14KB
jdmerge.c 14KB
pi.c 14KB
jidctred.c 14KB
ras_dec.c 14KB
jdinput.c 14KB
inftrees.c 13KB
jpg_dec.c 13KB
共 486 条
- 1
- 2
- 3
- 4
- 5
资源评论
- HuiHuangNumber12012-12-06很不错的库,可以处理多种类型的图片,并且效果非常好,特别是重新取样算法
- 英男2012-08-02可以用,已集成,谢谢
denglei265
- 粉丝: 29
- 资源: 17
上传资源 快速赚钱
- 我的内容管理 展开
- 我的资源 快来上传第一个资源
- 我的收益 登录查看自己的收益
- 我的积分 登录查看自己的积分
- 我的C币 登录后查看C币余额
- 我的收藏
- 我的下载
- 下载帮助
最新资源
资源上传下载、课程学习等过程中有任何疑问或建议,欢迎提出宝贵意见哦~我们会及时处理!
点击此处反馈
安全验证
文档复制为VIP权益,开通VIP直接复制
信息提交成功