ovlp_ripple

峰值信噪比（PSNR），一种评价图像的客观标准。水印提取判断效果。(Peak Signal to Noise Ratio (PSNR), objective criteria for evaluating image. Determine the effect of watermark extraction.)

pulse width modualtion code and demosulation

用于PF算法研究的5中基本算法及相应的实现程序，都可以直接运行，对于学习PF非常有帮助(For PF algorithm research 5 basic algorithm and the corresponding implementation procedures, can be run directly, is helpful for learning PF)

PCA distance and classification example

一个用来计算图像二维分形维数的matlab程序(A two-dimensional images used to calculate the fractal dimension of the matlab program)

说明：  仿真通过利用虚拟信道模型而产生瑞利衰落信道(rayleigh)

能够实现Sparse Coding，对IMAGES.mat文件进行训练。(To achieve Sparse Coding, carries on the training to the IMAGES.mat file)

傅里叶变换和小波变换重建图像的比较效果，这个程序可以用来实现四个要求：1、FFT和WT重建效果比较；2、通过改变小波来比较重建效果；3、通过改变分解层数来比较重建效果；4、通过改变大系数个数来比较重建效果。其中还有一个计算PSNR的程序(the comparative effect of reconstruction image by Fourier transform and wavelet transform 。 the program can be used to achieve the four requirements: 1, FFT, and WT reconstruction effect 2, by changing the wavelet to compare the reconstruction effect 3, by changing the decomposition layers to compare the reconstruction effect 4, by changing the number of large coefficient of comparative reconstruction results. Including a procedure of calculating PSNR )

数字滤波器的matlab的例程，从基本的到高级例子，内有详细程序的说明及仿真结果(Digital filter matlab)

说明：  给予神经网络RB发的MATLAB曲线拟合(Issued to give MATLAB neural network curve fitting RB)