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This paper presents a novel algorithm of hiding secret messages by applying mathematical lemmas and information theory. The proposed algorithm can hide more information with acceptable embedded rate and achieves requirements of information hiding algorithm and simply information extracting. The main idea is applying modern algebra to solve the information hiding problem in multimedia. In order to prevent some attacks on stganography, hidden initial bits of image data pixels are chosen randomly. The extracted information are achieved without the reference of the original image and extracted keys. The experiment results show that our approach is effective and reliable.

实现viterbi译码功能的matlab程序(source code for viterbi decoding)

说明：  用MATLAB实现水平集分割图像，效果较为理想(Using MATLAB to achieve the level of set partitioning image, the effect is more ideal)

边缘检测的MATLAB程序边缘检测的MATLAB程序边缘检测的MATLAB程序(MATLAB procedures for edge detection)

本程序是用于信号频谱分析的实验程序 主要功能是进行信号的幅值谱计算；同时可完成在选定范围内谱峰的精确频率、幅值和相位计算。(This procedure is the main function of the experimental procedure for signal spectrum analysis to calculate the amplitude of the signal spectrum to be completed by the precise frequency of the peak in the selected range, amplitude and phase calculation.)

edge detection with library operation on matlab

有向无环图程序，程序较为简洁，包含代码和简要说明。(Directed acyclic graph procedure is relatively simple, containing code and a brief description.)

使用自组织网络som根据动物特征进行分类的示例代码(Using self-organizing network based on animal characteristics to classify som sample code)

This is a matlab file that is simulating minimum shoft keying signals. This is a simulink file and pulse shaping is also used in it.

采用粒子群算法结合MATPOWER对GARVER-6配电网系统进行交流潮流计算并进行网架规划(AC power flow calculation and grid planning for GARVER-6 distribution system using particle swarm optimization and MATPOWER)