comparewav

本程序是EM算法，是参数估计（极大似然估计）方法的数值解法。(This procedure is the EM algorithm, is the parameter estimation (MLE) method of numerical solution.)

prime method is used for optimization

混沌的G-P算法，利用G-P算法计算混沌时间序列的关联维数(Chaos GP algorithm, the use of GP algorithm for chaotic time series of the correlation dimension)

说明：  ：针对MP3 编码方式和帧结构进行分析，利用帧中的比例因子提出了一种压缩域水印算法。算法通过引入帧变化分析步 骤，很好地实现了水印的自适应嵌入。对于不同的系统要求，还可以通过修改门限信噪比的值SNRlim按需进行水印嵌入，使算法 具有更大灵活性。同时在牺牲一定的嵌入空间前提下，实现了水印信息的自同步。实验表明，对于不同风格的音乐，该水印算法 具有很好的不可听性。(In this paper，the encoding method and the frame structure of MP3 are expounded in detail，a watermark algorithm is proposed based on the scale factor in MP3 frame.By introducing the step of frame altering analysis，the algorithm can realize that watermarks is embedded adaptively.By modifying threshold SNRlim（the ratio of signal to noise），the algorithm can meet different requirements of some system，that is what enable the algorithm to have a bigger flexibility.Based on expense of some embedding positions，the watermark can be embedded with self-synchronization.The experiment results show this algorithm can get a good audio effect with various types of audio.)

说明：  MATLAB 常用命令集合。能够很好的帮助初学者进行指导。内用确实很丰富不容错过(MATLAB command set used. Can be a good guide to help beginners. With a very rich indeed not to be missed)

this code realize the two dimention esprit algorithm

This program embed watermark in the wavelet coefficients.Recovery of watermark possible even in presence of noise.Evaluated with psnr

通过modelsim仿真检测matlab生成滤波器效果。(Generate the filter through matlab and simulated by modelsim.)

经典遗传算法，自然编码格式，用来计算任意N维函数的极值(genetic algorithm )

利用matlab计算图像的辐射精度（包含均值、方差、偏斜度和陡度）和信息量。(Calculation of the radiation image using matlab precision (including mean, variance, skewness and steepness), and the amount of information.)