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This a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compared for each DCT method. Effect of coarse and fine quantization is also examined. The execution time of 2 DCT methods is also checked. In addition, most energatic DCT coefficients are also applied to examine the effect in MatLab 7.4.0 R2007a. Input is 9 gray scale pictures & output is 9*9=81 pictures to compare. Blocking effect is obvious. -This is a JPEG encoding & decoding program of still image. It does not use level shifting. Discrete Cosine transform (DCT) is performed both by classical & Chen s Flowgraph methods. Predefined JPEG quantization array & zigzag order are used here. RUN - LEVEL coding is used instead of Huffman coding. Compression ratio is compar

电子教案 电子教案 电子教案-electronic templates of elect ronic templates of elect ronic templates of elect ronic templates

Dreamweaver MX 2004做ASP程序简单教程，有详细截图。-Dreamweaver MX 2004 to do simple ASP tutorial, have a detailed screenshot.

指导语义web中资源描述框架的实践，是英文资料，对于构建本体十分有帮助！-The guidance of semantic web in the resource description framework of practice, in English, for the Construction of Ontology very helpful!

ASN.1 的PER编码标准 X.691 (12/97) ASN.1 encoding rules - Specification of Packed Encoding Rules (PER) -X.691 (12/97) ASN.1 encoding rules- Specification of Packed Encoding Rules (PER)

网上的电子书《Jbuilder9基础教程》的全部例子源码-online electronic book, "Guide to Jbuilder9 basis," all examples of FOSS

JAVA CARD 开发包，对于 java card开发的 初学者来说，很有用；下再回去好好研究一下 和j2sdk1.4.2_06配合用 -JAVA CARD development kits, java card for the development of a newcomer, is very useful. Under further back and look carefully at the j2sdk1.4.2_06 accordance with the

安捷开发培训资料-Ansett develop training materials

Perl Win32 快速参考手册 可以打印出来 方便查找-Perl Win32 Quick Reference Guide can be printed to facilitate search

Quest3D中文教材Quest3D软件是目前世界上最先进的虚拟现实创作平台之一，Quest3D独特的编程风格，使得开发者可以非常容易的创作出效果完美的虚拟现实项目，软件开发者大量采用了功能强大的程序模块，使用者无须再去编写成千上万行的复杂编码，只需要动几下鼠标。-Chinese teaching materials Quest3D software Quest3D is the world