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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)
Platform: |
Size: 2048 |
Author: dyen0019
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Description: Example of Embedded Zerotree Wavelet encoding in ANSI-C()
Platform: |
Size: 5120 |
Author: Fxtch
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Description: Example of Embedded Zerotree Wavelet encoding in ANSI-C()
Platform: |
Size: 5120 |
Author: parlet |
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Description: 小波重构的时候waverec(c,l,'db1');其中c和l都应该是列向量,所以将数个向量合并成c时最好分别将他们弄成行向量,合并后转置就成了列向量。(When the wavelet reconstruction is waverec (C, l,'db1'), C and l should all be column vectors, so when several vectors are merged into C, it is best to make them a row vector respectively, and then merge into a column vector.)
Platform: |
Size: 160768 |
Author: 李必成 |
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Description: 此C程序用于生成一个雷克子波(ricker wavelet),并对其进行FFT(make a Ricker wavelet)
Platform: |
Size: 1024 |
Author: 羊咩咩123 |
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Description: 小波变换,对图像二维信号进行3层小波分解。
本题二维图像采用MATLAB自带的图片,实现图片多层小波分解的函数是:
[C,S]=wavedec2(X,N,’wname’) , 即使用给定小波‘wname’对二维信号X进行N层小波分解。本题使用’bior3.7’小波进行分析。(wavelet transform)
Platform: |
Size: 384000 |
Author: hxx140 |
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