chap6_5

Sampling matlab source

说明：  曲线标记改变的MATLAB程序。需要的来下载。(Curve marked change in the MATLAB program. Need to download.)

Wavelet denoising For using this code need to use signal toolbox and general toolbox in your matlab In the first part of this assignment, we asked to obtain a (black-and-white) digital image of size 512 by 512 and then generate noisy image by adding a Gaussian noise but under the condition of having SNR=20dB by select the suitable value of variance for Gaussian noise formula. Second step is performing wavelet denoising using the hard thresholding (Use the db 6 for four levels) in the condition of finding the optimal thresholding value of T in terms of the SNR obtained. It means that, we should find the highest SNR value by finding the suitable value for threshold. Then we asked to do the same process but this time using soft thresholding. Finally for the last part of question one, we should compare the results of the obtained SNR with the recommendations of 3*sigma for the hard thresholding and 3/2*sigma for the soft thresholding.

说明：  this doc of software defined radio for beginners

主要用于地震数据处理中读取segy文件数据，也可以自己合成的数据保存为segy文件。(Mainly used in seismic data processing to read segy file data, you can also save their synthetic data for segy file.)

Matlab text book.Primer edition for experts

优化程序，包括最短路径，最小生成树等。具体说明可以参考content文件 (optimization procedures, including the shortest path, minimum spanning tree, and so on. Specify reference document content)

low energy adaptive clustering code in matlab for wireless sensor netwoks

基于小波变换和经验模态分解的大地电磁信号静态效应消除源程序(Based on wavelet transform and empirical mode decomposition of the magnetotelluric signal source to eliminate the static effect of)

说明：  matlab实现JPEG2000图像标准(to achieve the standard JPEG2000 image using matlab)