cesheng

说明：  自己编制的傅立叶反变换MATLAB程序，有详细的注释，方便大家理解傅立叶反变换的意义。(Prepared by the Fourier inverse transform their own MATLAB programs, with detailed notes, to facilitate us to understand the significance of the Fourier inverse transform.)

说明：  用matlab实现的HS信道外编译码、凿孔卷积码的程序 (HS implemented with the matlab-channel encoding and decoding, gouges convolutional codes program)

说明：  系统辨识中的各种辨识算法：如最小二乘法、递推最小二乘法、广义最小二乘、变遗忘因子递推算法等。(System Identification of identification algorithm : if the least-squares method, recursive least squares method, generalized least squares, changing the forgotten factor algorithm.)

求DFT并做出离散函数xn的傅里叶变换图像 (Computing the 24-points DFTs of the two sequences that x1(n)= cos(nπ/6) and x2(n)= cos(nπ/4) using a single 24-point DFT by Matlab )

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语言编写的图形分割程序，本程序是基于Ostu方法的分割。(MATLAB Segment)

Ky thuat ghep kenh theo khong giam.

包括emd分解程序，求边际谱程序，hilbert包络解调程序，求取小波包频带能量程序，K均值聚类程序(fault diagnosis program)

introduction of fisher

lowpass filters in matlab