网站首页

登录

denoisingWavelet

于 2013-12-11 发布文件大小:89KB

 0  159

下载积分: 1 下载次数: 9

我要下载

代码说明：

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.

下载说明：请别用迅雷下载，失败请重下，重下不扣分！

发表评论

0 个回复

matlab-break
这是关于数字水印的攻击例程！经过调试，可以放心使用！(This is on digital watermarking attacks routines! After debugging, can be assured use!)

2006-06-28 14:31:11下载

积分：1
NR_test
example of speech noise reduction

2013-05-27 03:16:52下载

积分：1
ofdm_qpsk_awgn
ofdm系统qpsk调制、awgn信道下的仿真，对于ofdm信号有全面的认知(qpsk modulation ofdm systems, simulation awgn channel under the ofdm signal for a comprehensive awareness)

2015-04-02 21:26:36下载

积分：1
bottom_up_segmentation
这是TD算法的逆过程，首先将时间序列，划分为相邻点的短序列，当然此时的拟合误差为0，因为第一点和第二点的连线，原始点都落在线段上。将相邻两个线段连接起来，此时每条线段包含三个原始点，计算中间那个点的拟合误差。这样，所有这些三个点的线段中的中间点的拟合误差计算出来后，找出误差最小且误差小于阀值R的分段，作为第一条包含三个点的线段。在上面的基础上，第一条分段同样的和相邻线段连接，然后计算每一条分段的拟合误差，再找出误差最小且小于阀值R的分段，作为第二个分段。依次方式循环，直到所有分段的拟合误差都小于阀值R，分段结束。 (This is the reverse process of TD algorithm, the first time series is divided into short sequences adjacent dots, of course fitting error is zero at this time, because the first and second points of connection, the original point fall line on. The two adjacent segments are connected, then each segment contains three original point, the intermediate fitting error calculated that point. Thus, after all these segments fitting error of three points in the intermediate point calculated to find the minimum error and the error is less than the threshold R segment, as the first line contains three points. Based on the above, the first segment and the adjacent line segment connecting the same, and then calculate a fitting error for each segment, and then find the smallest error and less than the threshold R segment, as the second segment . Followed by a cyclic manner until all segments fitting error is less than the threshold R, segment ends.)

2021-03-20 16:29:18下载

积分：1
dace_kriging
DACE- A MATLAB Kriging Toolbox Version 2.0, August 1, 2002. (Sø ren N. Lophaven, Hans Bruun Nielsen, Jacob Sø ndergaard) - The software package DACE (Design and Analysis of Computer Experiments), which is a Matlab toolbox for working with kriging approximations to computer models. The typical use of this software is to construct a kriging approximation model based on data from a computer experiment, and to use this approximation model as a surrogate for the computer model.

2011-05-18 20:54:57下载

积分：1
Chapter2_Arrays_and_Spatial_Filters
Optimum array processing 最优阵列处理技术第二章阵列和空域滤波器的MATLAB程序 DOA MUSIC ESPRIT( Optimum array processing DOA MUSIC ESPRIT)

2010-07-04 09:16:04下载

积分：1
uibutbut
Creates pushbutton uicontrol labeled with TeX or LaTeX strings

2010-12-16 20:38:32下载

积分：1
Crop
matlab code for cripppong an image

2010-05-15 17:51:44下载

积分：1
try1_1
果蝇算法的matlab编程实现，函数优化来测试(Drosophila algorithm matlab programming, function optimization to test)

2012-10-13 11:08:24下载

积分：1
GA_Sched
Algorithm MIMO multi-users with sheduler

2010-07-14 15:38:50下载

积分：1

696518资源总数
105873会员总数
12今日下载