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DCT_IDCT
- to understand the Algorithm go to matlab help in page dct2 and idct2 to get the mathematical expression for M = N = 8, we can calculate the most of hard values and save it as LUTs to speed up the execution now compare our special 8X8 functi
DCT2SHIXIAN
- 数字水印研究及Matlab仿真实现-基于DCT2的水印嵌入与提取程序，有结果说明，具有较强的鲁棒性-Digital watermarking and Matlab Simulation- based DCT2 watermark embedding and extraction procedures, results indicate that, with a strong robustness
Ten
- 第十章 MATLAB 图像正交变换 10.1 正交变换通用算子 10.2 傅立叶变换 10.2.1 傅立叶变换的原理 10.2.2 傅立叶性质 10.2.3 二维离散傅立叶变换（ 2DDFT ） 10.2.4 快速傅立叶变换（ FFT ） 10.2.5 傅立叶变换的研究与应用 10.3 离散余弦变换 10.3.1 DCT 变换矩阵 10.3.2 dct2 函数和 dctmtx 函数 10.4 Walsh- Hadamard 变换
Image
- 求图像的熵以及两幅图像间的交叉熵，自己验证可以使用，放心下载！-Entropy, as well as for the image between two images of the cross-entropy, can be used to verify their own, rest assured that download!
DCT2
- 基于DCT变换的数字视频水印源程序，在Matlab中可以直接运行-DCT-based digital video watermarking source code in Matlab can be run directly
myDCT
- 用解析式定义或矩阵式定义自行编写进行二维DCT和离散沃尔什-哈达玛变换的函数。 在Matlab中对给定图像进行二维离散傅立叶变换，并显示其居中的频谱图，可用Matlab自带函数进行实验。 分别用Matlab自带的dct2()和idct2()对给定图像进行二维DCT变换，并以图像的形式显示其变换系数矩阵。 -And the preparation of two-dimensional DCT is defined analytically discrete Wals