Imagewatermarking

this help to draw delaunay triagles is input x,y to vectors represent coordinate of points for exemple p1(1,2) ,p2(3,4) p3(5,6) then x=[1,3,5] and y=[2,4,6]

Includes source codes to find DFT of a sequence, to find odd and even components of a signal, to perform PSK, FSK, QPSK.

基于高斯混合模型和EM（Expectation Maximization）算法的SAR影像变化监测算法，并附带示例。总体思路是首先将两个时期的SAR影像做log和ratio运算，生成差分影像，然后通过EM算法估计高斯混合模型的参数，最后根据高斯混合模型最大概率，生成变化监测结果。(Unsupervised change detection method for SAR images using EM algorithms of Gaussian mixture model)

This function computes autocorrelation with a biased scaling.

本程序已被本人整理到WORD文档中，编程语言为MATLAB，本文设计的滤波器采用傅里叶级数展开法。模拟的杂波的功率谱密度采用BVURG法，概率密度函数的估计采用直方图估计法，设计参数皆在文档中表明。此程序已经验证是正确可执行的，并能生成图形，值得下载！(This program has been organized into WORD document I, the programming language MATLAB, the filter designed in this paper Fourier series expansion method. Simulated clutter power spectral density using BVURG method, the probability density function is estimated using histogram estimation methods, design parameters are indicated in the document. This procedure has been verified is correct executable, and can generate the graph, it is worth to download!)

MATLAB实现灰色预测程序，共计两个，都能用，已调试成功(MATLAB realization of gray prediction program, a total of two, can be used, has been successful commissioning)

仿真未编码和进行Hamming编码的QPSK调制通过AWGN信道后的误比特率性能(Hamming coding and for the simulation are not encoded by QPSK modulation in AWGN channel, the bit error rate performance)

本人改进的关于自适应分割方法，结合了大津法获得的阈值作为初始阈值，可以提高运行速度和分割效果(I improved on the adaptive segmentation method that combines the Otsu threshold obtained as the initial threshold, can improve speed and segmentation results)

1．窗口法设计FIR数字滤波器。 2．以Butterworth 模拟低通滤波器为原型，设计IIR数字滤波器。(1. Window Design of FIR digital filter. 2. In order Butterworth analog low-pass filter for the prototype, design IIR digital filter.)

Rayleigh fading channel based on the Filtered Gaussian Noise method and r based on the Sum of Sinusoids method(simulation for Rayleigh fading channel -Plot the channel output for fm T = 0.01, 0.1 and 0.5 (t/T = 0 ~ 300) – Plot the channel output autocorrelation for fm T = 0.01, 0.1 and 1.0 (fm  = 0 ~ 10))