matlab_helmholtz_TP3

基于 DCT(离散余弦变换 )域的信息隐藏算法是目前应用最广的变换域算法 ,此类算法的最大不足是嵌信息量小。通过分析 DCT域隐藏算法隐藏容量少的原因 ,提出了一种大容量的 DCT域信息隐藏算法。算法首先对载体图像进行频谱均匀化处理 ,然后对图像进行全局 DCT变换 ,并将隐藏信息嵌入到载体图像的低频 DCT系数上 ,信息嵌入采用分段量化的方法实现 ,提取隐藏信息时不需要原始载体图像。实验结果表明 ,该算法的嵌入容量大 ,不可感知性好。(Based on DCT (discrete cosine transform) domain information hiding algorithm is the most widely used transform domain algorithms, the largest of these algorithms is the lack of a small amount of information embedded. Hiding Algorithm for DCT domain by analyzing the hidden reasons for the low capacity, a large capacity of information hiding algorithm for DCT domain. Firstly, the spectrum of the carrier image homogenization, and then the image is a global DCT transformation, and hidden information embedded into the image of the low-frequency DCT coefficients, the information embedded in the methods used to achieve sub-quantization, extract hidden information without the original Vector image. Experimental results show that the algorithm embedding capacity, can not be perceived good.)

用matlab对图像进行处理的几个源码，傅立叶变换，重建图像，灰度扩展，多种图像增强，滤波。(using Matlab, the image of several source, Fourier transform, image reconstruction, Gray expansion a variety of image enhancement, filtering.)

A simple nonlinear system is described within the Simulink environment.For control purposes, a sliding mode controller is designed in order to regulate the system to the origin. Furthermore, the chattering reduction has also been addressed with the introduction of tanh function.

说明：  BP神经网络用与实现不同故障的分类，对复杂信号模式识别是一种很有效的方法。(BP neural network with the classification of different faults and implementation of complex signal pattern recognition is a very effective method.)

说明：  利用MATLAB实现OFDM系统中AWGN信道(using MATLAB OFDM system AWGN)

改进的空间平滑music方法，用于阵列信号处理的高分辨率估计(promoted music algorithm)

一种基于统一模型的盲信号分离matlab源代码，三路语音信号盲分离源程序(A unifying model for blind separation of independent sources)

实现对图片的小波消噪程序，可在matlab中实现仿真。(The realization of the wavelet image de-noising procedure, can be achieved in the matlab simulation.)

matlab中编写计算器程序，matlab中编写计算器程序(matlab calculator in the preparation of procedures, matlab calculator in the preparation of procedures)

Matlab 数值计算讲义和例程，包括如下章节： 范数、条件数和方程解的精度 矩阵特征值和矩阵函数 奇异值分解 函数的数值导数和切平面 函数极值点 数值积分 随机数据的统计描述 多项式拟合和非线性最小二乘 插值和样条 Fourier分析 常微分方程 稀疏矩阵(Matlab numerical evaluation)