image-degneration-and-restoration

数字水印matlab程序，只是简单的svd跟最简单的置乱方法Arnold的应用。没有用到小波算法。上传的dwt_svd_GUI.rar是完整的数字水印算法，用的是混沌加密。(Matlab digital watermarking process, with the svd simply the easiest way to Arnold scrambling applications. Wavelet algorithm is not used. From the dwt_svd_GUI.rar is a complete digital watermarking algorithm, using a chaotic encryption.)

说明：   采用抗积分饱和PID控制算法进行离散系统阶跃响应。可以避免控制量长时间停留在饱和区，防止系统产生超调。(PID Controler with intergration sturation)

A dynamic estimation of channel is necessary before the transmission of the signals since the wireless channel is time–varying..we use MMSE method for channel estimation. The MMSE method calculates the following, MMSE channel estimator is designed to minimize the estimation MSE. The MMSE estimate the channel responses.

Thresholding of i/p image

模拟退火算法源码及相关论文，代码有详细注释，配以论文解释(Simulated annealing algorithm source code and related paper , the code has detailed notes , together with the paper explains)

这个例子显示了一个静止同步补偿器（STATCOM）用于中点电压调节的500千伏输电线路。(This example shows a Static Synchronous Compensator (STATCOM) used for midpoint voltage regulation on a 500-kV transmission line.)

说明：  x=2*sin(4*pi*t)+5*cos(8*pi*t) 对其进行快速傅立叶变换 加入高斯噪声 再进行频谱分析(x = 2* sin (4* pi* t) 5* cos (8* pi* t) makes its rapid Fourier transform to re-Gaussian noise spectral analysis)

说明：  generation of AM signal,,simulink

对数字散斑的形成仿真处理有全面的介绍 对研究数字散斑在各种方面的测量很有帮助 很有启发性(Simulation of digital speckle formation process with a comprehensive introduction)

Newton-Raphson method for all real roots of the polynomial