JPEG2000 C语言源代码全集

时间:2012-03-31 02:40:37
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文件名称:JPEG2000 C语言源代码全集

文件大小:466KB

文件格式:RAR

更新时间:2012-03-31 02:40:37

JPEG2000 C语言 源代码

Changes from version 2.2.2 to version 2.2.3 ------------------------------------------- * Extremely minor changes to avoid mixed use of formatted and unformatted calls to "ostream" objects. These appear to excite a bug in GCC version 3.0. The only file affected is "params.cpp" in "coresys/parameters". Changes from version 2.2.1 to version 2.2.2 ------------------------------------------- Note: none of these have any impact whatsoever on executable code or DLL's. * Renamed the "core" directory as "coresys". A trivial change and my appologies for those whom this might adversely affect. However, the use of the name "core" was causing some people difficulties, since it is identical to the name of a Unix core dump file. * Made the Linux MMX-optimized functions "extern C" instead of "extern", so as to avoid problems caused by different name mangling conventions between various versions of gcc. * Eliminated multi-line comments from assembler files so as to avoid problems created by earlier versions of the gnu assembler. Changes from version 2.2 to version 2.2.1 ----------------------------------------- * Replaced the C++ I/O routines used for image and compressed data transfers with ANSI C I/O functions. This was motivated by the fact that the new-style ANSI C++ I/O package is unbelievably slow, at least as implemented in Microsoft's Visual C++ compiler. The change has no impact whatsoever on the Kakadu core system; it affects only the implementation of a few application level objects -- the core system abstracts all such I/O considerations through interface classes which are implemented by applications. Everything now runs a little faster than it did in version 2.1 and quite a bit faster than it did in the first release of version 2.2. * Made provision for compiling under versions of GCC prior to version 3.0. To use this, you should define GCC_VERSION_LESS_THAN_3. Changes from version 2.1 to version 2.2 --------------------------------------- * Extensive support for ROI (Region of Interest) specification at encode time (see "kakadu.pdf" for more on this). * Migrated from the old-style C++ iostream package to the new standard iostream package -- minimal use of "using namespace std" and never used in common header files, so this should enhance namespace protection and portability. * Added AT&T style versions of the small amount of Pentium assembly code to enable compilation of a high speed version under GCC as well as MSVC. * Some minor bug fixes. Changes from version 2.0.2 to version 2.1 ----------------------------------------- * Extensive support for working with the JP2 file format. The "kdu_show" application demonstrates the capabilities required of a conformant JP2 reader: palette mapping; interpolation of components to a common resolution; application of registration offsets in the CRG marker segment; and colour conversion to an appropriate rendering space (sRGB here). The "kdu_region_decompressor" object provides extensive support for general purpose interactive rendering applications, performing all of the above tasks in a platform independent manner. * It is now possible to directly control rate-distortion slope thresholds used in the construction of quality layers. This capability may also be used to significantly increase compression speed, if a suitable threshold is known, since the encoder then incrementally predicts the point at which there is no point in coding further coding passes. * A number of improvements to the "kdu_show" application, including the ability to arbitrarily zoom into images. * A number of minor bug fixes, including one important bug reported by Aaron Deever of Kodak, and a bug which occasionally manifested itself in the incremental rate prediction heuristic (reported by Jim Andrew of CISRA). * Improved documentation. Changes from version 2.0.1 to version 2.02 ------------------------------------------ * A PDF document (documentation.pdf) has been prepared to guide the new user into some of the more important aspects of the Kakadu system. The first draft is included here. * A very simple compression example and a very simple decompression example have been added to assist developers in familiarizing themselves with the Kakadu system -- the existing demo apps provide perhaps too much functionality to be quickly understood. * A full BIBO (Bounded Input Bounded Output) numerical analysis of the DWT and other processing steps is used to establish the best utilization of limited precision sample data representations. The new version should not be able to fall prey to numerical overflow or underflow difficulties under any circumstances (this could just have been possible with the last version). It also provides slightly higher accuracy. * The automatic heuristic for generating quality layer rate targets has been substantially improved. * A number of minor bugs/limitations were corrected, although these had not manifested themselves in any real examples. Changes from version 2.0 to version 2.01 ---------------------------------------- * One line change in each of "kdu_expand.cpp" and "kdu_compress.cpp" to correct a minor rare bug in these demo applications. * Minor changes in "kdu_show.cpp" to correct a rare bug and improve the user interface in regard to image rotation. * Four lines added to each of "encoder.cpp" and "decoder.cpp" to fix a minor memory leak.


网友评论

  • 意义不大,基本拿来没什么用。提取算法太难
  • 帮助别人找的,感觉很有用!
  • 有没有测试简介啊,怎样验证呢?求指导啊!!!yuwenzhe_mcu@126.com,多谢指点!
  • 之前下载过官方的的源码,只是因为缺少相关的说明文档才重新查找,结果还是没找到吧。
  • 看不太懂,但还是谢谢楼主
  • 内容丰富,对学习非常有帮助,谢谢!
  • 资源很好,内容很丰富,谢谢分享,对我很有帮助
  • 是Kakadu源码 还是很不错的,可移植可做动态库
  • 这不就是kakadu吗,怎么不说清楚点。。。。。
  • 功能很全、应用面广,具有很好的参考价值,多谢分析
  • 具有参考价值,值得看看。
  • 代码很全,对项目很有帮助
  • 代码很多啊,有些不懂。。
  • 我使用VS2010编译过不了,编译coresys时编译通不过,而直接编译APP则缺少DLL
  • 资源很丰富,对教学很有用
  • 源码很详尽,结构很清楚,很有学习价值
  • 刚看了一部分,有点看不懂,但是运行没有问题
  • 不错的代码。很有用。
  • 虽然设计的很简单,但对自己还是很有帮助的!
  • 虽然有3个内存泄漏问题,总体还是不错的。
  • 正在研究,希望能看懂。
  • 比较全没想到有这么多代码
  • 好多啊,很全。但是,偶看不懂。不知道怎么使用
  • 比较全没想到有这么多代码
  • 设计流程比较简单 但是总体上还是不错的
  • 看了很有启发 但是能给出更详尽的设计流程 及相应的各部分的算法 就更容易理解了···
  • Kdu,有可以处理MJ2文件的最新版本的就更好了