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有一个机遇DCT域的数字水印算法,里面有详细的注释说明,可以拿来研究-This is a DCT watermarking algorithm attached with detailed comments and explanation, which can be used for research purpose.
Update : 2008-10-13 Size : 495168 Publisher : 符号

实行针对图像的DCT以及IDCT变换的源程序。-instituting image DCT and IDCT transformation of the source.
Update : 2008-10-13 Size : 791964 Publisher : 钟祖豪

本文结合DCT变换的特性,利用分形的Peano一hilbert扫描曲线,对基于DCT变换的图像编码方法进行了研究,并提出了改进方法。主要工作分为两个部分: 一是在分块DCT基础上的改进。对分块后生成的各图像块矩阵,不直接作二维DCT变换,而是先进行扫描,使之重排成一维向量,再进行一维DCT变换,这样可以减少运算量。 其次是对层次余弦变换编码部分的改进。使用层次DCT变换与零树编码相结合的方法,并在扫描编码过程中,按Peano一hilbert扫描顺序进行编码。这样不仅可以减少“块效应”,而且可以加快编码速度。-this paper the characteristics of DCT, using fractal Peano a Hilbert scanning curve, the DCT-based image coding method for the study and improvement of methods. The work is divided into two main parts : First, the DCT block on the basis of improvements. Right after block production of the image block matrix, not for direct two-dimensional DCT, but first scan, so they line up in a heavy-dimensional vector and then a peacekeeping DCT, thus reducing the amount of computation. Secondly, the level of cosine transform coding some of the improvements. The use level of DCT and zero tree coding combination of methods, coding and scanning process, according to a Hilbert Peano code scanning sequence. This will not only reduce the "blocking effect" but we can speed up the coding speed.
Update : 2008-10-13 Size : 5011825 Publisher : lzy

该代码实现了DCT变换


Update : 2008-12-11 Size : 1363 Publisher : colourtao

两种方法实现dct变换,一般和快速.通过比较可以看出快速变换的优越性.
Update : 2009-08-19 Size : 4846751 Publisher : iamfumingzhe@163.com

DL : 0

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Update : 2008-12-15 Size : 128664 Publisher : liziqing

H.264编码中变换和量化中的DCT变换
Update : 2010-11-14 Size : 64699 Publisher : tshblg

整数DCT变换
Update : 2010-12-15 Size : 2904 Publisher : wbh200892268

基于DCT的图像压缩编码算法研究与实现
Update : 2011-02-20 Size : 107008 Publisher : shiyou617

用DCT方法进行水印提取
Update : 2011-03-22 Size : 3394 Publisher : wyy031980

图像DCT变换
Update : 2011-03-24 Size : 322494 Publisher : warrior_code

基于DCT数字水印的生成以及水印攻击测试!MATLAB源码
Update : 2011-04-18 Size : 45255 Publisher : 542214220@qq.com

这是一个有关于视频水印的程序,包含yuv格式的读入,提取出每一帧图像,然后对每一帧图像做8*8块DCT变换,然后在中低频修改DCT系数然后恢复图像,重构成yuv格式的视频播放。
Update : 2011-05-09 Size : 1574 Publisher : yuehengli

基于DCT域 数字水印源码
Update : 2011-05-23 Size : 283890 Publisher : 526635454@qq.com

DCT图像变换(不含小波)的MATLAB代码--一个图像工具
Update : 2011-11-27 Size : 605059 Publisher : hy447415360@126.com

DL : 0
图象处理程序,提供了图象直方图均衡,robert,sobel,prewitt,kirsch,gauss等方法的边缘检测运算,中值滤波,二维FFT变换和DCT变换,图象的反转,旋转等一些基本的图象模板变换和点变换的功能。目前只处理256*256的图象-Image processing procedures, provided the image histogram equalization, robert, sobel, prewitt, kirsch, gauss edge detection methods such as computing, median filter, two-dimensional FFT transform and DCT transform, image reversal, rotation and other basic template images transform and transform the functions of points. At present, only deals with 256* 256 image
Update : 2024-05-17 Size : 550912 Publisher : lukecheng

一个快速算法的例子,有和一般算法的比较--A example about fast algorithm , it has been comparied with common algorithms
Update : 2024-05-17 Size : 55296 Publisher : 站长

离散余弦变换SSE-Discrete cosine transform SSE
Update : 2024-05-17 Size : 14336 Publisher : 张立

DL : 2
离散余弦变换源代码(VC)- Separate cosine transformation source code (VC)
Update : 2024-05-17 Size : 1024 Publisher : 张宏

快速DCT算法32位的C语言实现,乘法次数最少,可嵌入编码器及解码器使用- Fast DCT the algorithm 32 C language realization, the multiplication number of times are least, may insert the encoder and the decoding use
Update : 2024-05-17 Size : 5120 Publisher : 周辉
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