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xiaoboxiaoxiaobo
- 用于小波变换,调试过很好.可以求出任意多个小波系数.-for wavelet transform, debugging very good. Can be obtained arbitrary number of wavelet coefficients.
sparfilt
- 优点:1.对于信噪比高的信号滤波效果好; % 2.对于边沿的保护强过阈值滤波,不会产生阈值滤波情况下的过于平滑与Gibbs现象。 %缺点:1.由于对边沿信号没做任何处理,所以边沿可能会有脉冲噪声保留下来; % 2.计算相关系数中,如果计算出来的小波系数点位置偏差大,则相关系数计算受影响; % 3.需要迭代运算,迭代的噪声能量阈值选取很重要,这里以开始段无信号处估计噪声; % 4.需要迭代运算,所以运算量比阈值法大; % 5.受分解层次影响,在大尺度上小波系数点位置偏差更大
wave2gray
- 小波系数显示的MATLAB函数,冈萨雷斯MATLAB版书中的内容-MATLAB function displays the wavelet coefficients, Gonzalez MATLAB version of the book' s content
xiaobobaofenjie
- 本程序重构各层低频和高频系数,画功率谱,横坐标为频率,纵坐标为功率,小波包分解最后一句是为显示小波包四层分解树结构-Reconstruction of the procedural layers of low and high frequency coefficients, draw power spectrum, the abscissa is the frequency, the vertical axis is power, wavelet packet decomposition is
wavepenergy
- 小波包能量代码,利用db1小波将信号分解和重构,然后计算小波系数的平方,进行正则化-Wavelet packet energy code, the use db1 wavelet signal decomposition and reconstruction, and then calculate the square of wavelet coefficients, the regularization
matlab1
- 我们知道,小波变换的一级分解过程是,原始信号分别进行低通、高通滤波,再分别进行二元下抽样,就得到低频、高频(也称为平均、细节)两部分系数;而多级分解则是对上一级分解得到的低频系数再进行小波分解,是一个递归过程。以下是一维小波分解的程序. -We know that a wavelet transform decomposition process is that the original signal were low-pass, high pass filter, and then
yuzhi
- 小波软阈值simulink模型,对带噪语音信号进行小波分解,得到高低频系数,然后对高低频系数进行阈值处理,然后就行重构得到去噪语音信号-the simulink model of yuzhi
hvsWaveletWatermark
- 关于对hvx人体视觉水印的编写。有小波水印的全过程:分解、嵌入、重构、提取。人体视觉的体现:三大重要系数的利用 -On the preparation of hvx human visual watermark. There wavelet watermark the entire process: decomposition, embedding, reconstruction, extraction. Human visual manifestation: the use of thr
matlab1
- 二维离散小波变换和重构(对高通和低通系数分别卷积。。。)-Discrete wavelet transform and reconstruction (high-pass and low pass convolution coefficients...)
CBIR
- 一个基于Gabor滤波器组的多特征融合的图像检索算法(CBIR based on Multi-Features Combining Multi-parameters from Gabor Filter-bank, 简称multi法),融合了基于Gabor 小波系数的标准方差,峰态,能量,平滑度和一致性度量五个特征量度,实验表明,该算法是一种更加有效的图像检索方法。-we propose a CBIR algorithm based on Multi-Features Combining Mult
zhiyudian-tuxiangpeizhu
- 基于点的matlab图像配准.提出一种基于小波系数的特征索引算法,实现了图像特征点对的快速搜索和两幅图像之间的匹配-Based on the point of matlab Image Registration. Presents a feature based on wavelet coefficients indexing algorithm to realize the image feature points on the fast search and matching between
EZW
- Shapiro提出的内嵌零树小波编码算法(EZW Embedded Zerotree Wavelet),其出发点在于小波变换后各级子带系数之间在空间上和方向上所呈现出带间相似性,这种空间相似性可以用一种新型的数据结构--零树(Zerotree).EZW算法就是充分利用这种相似性,获得高性能的图像编码算法.-Shapiro' s embedded zero tree wavelet coding algorithm (EZW Embedded Zerotree Wavelet), whose
mw_NBdenoising2
- 基于多小波变换的阈值降噪技术的相邻系数法降噪算法-Based on multi-threshold wavelet transform coefficients of adjacent noise reduction noise reduction algorithm
xishutu
- 对复小波提取高频及低频的系数 并对相应的实小波的系数也进行了提取-Extraction of complex wavelet coefficients of high frequency and low frequency And the corresponding real wavelet coefficient were extracted
Matlab
- 信号去噪的基本步骤: (1)信号的小波分解; (2)小波分解高频系数的阈值量化; (3)信号的小波重构。使用分解的低频系数以及阈值量化后的高频系数进行小波重构。 -The basic steps of signal denoising:( 1) of the wavelet decomposition of signals ( 2) the high frequency coefficients of wavelet decomposition threshold quan
wavelet-MATLAB-code
- 实现以下功能:装载信号;完成信号的单尺度一维离散小波分解;从系数中重构低频部分和高频部分;显示高频和低频部分;由小波逆变换恢复信号;多层一维分解;提取系数的低频和高频部分;重构第3层的低频系数;重构第1、2、3、4、5层的高频信号;重构原始信号并显示-Achieve the following functions: load signal complete signal single-scale one-dimensional discrete wavelet decomposition r
小波分解重构
- 小波分解重构,可以作为研究小波频率的一个重要参考,但是注意,该代码分解出来的高低频系数不能完全当作滤波器使用,只是参考。(Wavelet decomposition and reconstruction can be used as an important reference for studying wavelet frequency, but attention is paid to the high and low frequency coefficients decomposed by
小波变换
- 该程序为小波变换以及小波包变换。将波形进行多尺度分解变换,得到近似系数以及细节系数。(The program uses wavelet transform to transform the waveform into multiscale decomposition, and obtains the approximate coefficient and the detail coefficient.)
小波分解与重构
- 光谱数据的小波分解与单层重构并输出低频和高频系数的MATLAB算法
新的小波去噪程序
- 通过分析硬阈值函数的数学特性,并考察其对电能质量扰动信号的去噪过程可知, 该算法仅简单的对小波系数进行剔除与保留,在抑制噪声的同时也容易将突变点去除, 最终导致扰动定位失效,不利于分析电网故障的类型以及发生的起止时刻。(By analyzing the mathematical characteristics of the hard threshold function and investigating its denoising process to the power quality