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Description: 这是一系列的小波的程序，很有用的，包括小波，小波树，小波反变换等等，这是我的毕业设计的东西-This is a series of wavelet procedures, very useful, including wavelet, wavelet tree, wavelet transform, and so on. This is my graduation design things
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Size: 1291 |
Author: 王学平 |
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Description: 这是一系列的小波的程序，很有用的，包括小波，小波树，小波反变换等等，这是我的毕业设计的东西-This is a series of wavelet procedures, very useful, including wavelet, wavelet tree, wavelet transform, and so on. This is my graduation design things
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Size: 1024 |
Author: 王学平 |
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Description: 利用matlab自带函数wavedec2、wcodemat实现二维小波分解与简单压缩的实例。-using Matlab wavedec2 bringing their function. wcodemat 2D wavelet decomposition and compression simple examples.
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Size: 1024 |
Author: gaozhibin |
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Description: 小波信号去噪例子,默认阈值去噪，强制去噪和软阈值去噪三种方法-wavelate-wavedec
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Size: 3072 |
Author: 你好 |
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Description: 小波分解程序 把一副图像用小波进行分解 已达到增强图像的目的-Decomposition process to an image using wavelet decomposition has reached the purpose of enhancing the image
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Size: 1024 |
Author: 王强 |
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Description: 采样频率
fs=10000
轴承外环故障信号
fid=fopen( bearingout.dat , r ) 故障
N=1024
xdata=fread(fid,N, int16 )
fclose(fid)
xdata=(xdata-mean(xdata))/std(xdata,1)
时域波形
figure(1)
plot(1:N,xdata)
xlabel( 时间 t/n )
ylabel( 电压 V/v )
db10小波进行4层分解
一维小波分解
[c,l] = wavedec(xdata,4, db10 )
重构第1～4层细节信号
d4 = wrcoef( d ,c,l, db10 ,4)
d3 = wrcoef( d ,c,l, db10 ,3)
d2 = wrcoef( d ,c,l, db10 ,2)
d1 = wrcoef( d ,c,l, db10 ,1)
- Sampling frequency fs = 10000 bearing outer ring fault signal fid = fopen (' bearingout.dat' , ' r' ) failure N = 1024 xdata = fread (fid, N, ' int16' ) fclose (fid ) xdata = (xdata-mean (xdata))/std (xdata, 1) time-domain waveform figure (1) plot (1: N, xdata) xlabel (' Time t/n' ) ylabel ( ' voltage V/v' ) db10 wavelet decomposition 4 layer one-dimensional wavelet decomposition [c, l] = wavedec (xdata, 4, ' db10' ) 1 ~ 4 reconstructed detail signal d4 = wrcoef (' d' , c, l, ' db10' , 4) d3 = wrcoef (' d' , c, l, ' db10' , 3) d2 = wrcoef (' d' , c, l, ' db10' , 2) d1 = wrcoef (' d' , c, l, ' db10' , 1)
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Size: 1024 |
Author: 王飞 |
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Description: 用wavedec2()函数对b1,b2两幅图像进行小波分解, 采用’haar’小波, 尝试着分解到第二或第三级 融合两幅图像。-With wavedec2 () function b1, b2 two images using wavelet decomposition, using haar wavelet, trying to break into the second or third grade fusion of two images.
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Size: 208896 |
Author: 流风 |
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Description: 小波分解详细过程源码。此代码由本人将网上下载的程序改进了一下，并加了例子。其功能与matlab自带的函 数wavedec一致，由于自带的函数理解比较困难不方便改进，我改的程序简洁，方便大家理解该函数的意义和原理。
-This code will be downloaded from the program, I improved a bit, and added examples. Its function with matlab built-in function wavedec the same, due to built-in function is more difficult to understand inconvenient to improve, I changed the program is simple for everyone to understand the meaning of the functions and principles.
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Size: 2048 |
Author: 吴刚 |
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Description: 该小波函数主要功能是自由选定任意小波和分解层数对信后进行分解，能正常运行。-The wavelet function main function is to free any selected layer number of wavelet and decomposition to decompose after the letter, can run normally.
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Size: 2048 |
Author: 张旭帆 |
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Description: 运行emd,得到输入信号X的固有模态函数（imf），每列代表着信号X的一阶分量，X就是我们采集的信号。
hhtdn是hht去噪的程序，可以不看，仅看emd 和 findpeaks
wvtdn是wavelet去噪程序，如果只是分解信号，仅用下面的语句即可
[C,L] = wavedec(x_noise,dl,wn);
x_noise就是我们采集的信号，dl是分解的阶数，wn是分解的母小波名称(% Empiricial Mode Decomposition (Hilbert-Huang Transform)
% imf = emd(x)
% Func : findpeaks)
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Size: 2048 |
Author: dyen0019
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