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    發布日期: 2023-11-09
  • 語言: Matlab
  • 標簽: ewt??matlab??toolbox??

資源簡介

經驗小波分解源代碼工具箱及英文原文,可直接加載使用,注釋全面

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代碼片段和文件信息

function?[ewtmfbboundaries]=EWT1D(fparams)

%?=========================================================================
%?function?[ewtmfbboundaries]=EWT1D(fparams)
%?
%?Perform?the?Empirical?Wavelet?Transform?of?f?over?Nscale?scales.?See?
%?also?the?documentation?of?EWT_Boundaries_Detect?for?more?details?about
%?the?available?methods?and?their?parameters.
%
%?Inputs:
%???-f:?the?input?signal
%???-params:?structure?containing?the?following?parameters:
%???????-params.log:?0?or?1?to?indicate?if?we?want?to?work?with
%????????????????????the?log?spectrum
%???????-params.preproc:?‘none‘‘plaw‘‘poly‘‘morpho‘tophat‘
%???????-params.method:?‘locmax‘‘locmaxmin‘‘locmaxminf‘‘adaptive‘
%???????????????????????‘adaptivereg‘‘scalespace‘
%???????-params.reg:?‘none‘‘gaussian‘‘average‘‘closing‘
%???????-params.lengthFilter:?width?of?the?above?filters
%???????-params.sigmaFilter:?standard?deviation?of?the?above?Gaussian
%????????????????????????????filter
%???????-params.N:?maximum?number?of?supports
%???????-params.degree:?degree?of?the?polynomial?(needed?for?the
%???????????????????????polynomial?approximation?preprocessing)
%???????-params.completion:?0?or?1?to?indicate?if?we?try?to?complete
%???????????????????????????or?not?the?number?of?modes?if?the?detection
%???????????????????????????find?a?lower?number?of?mode?than?params.N
%???????-params.InitBounds:?vector?of?initial?bounds?(in?index?domain)
%???????????????????????????needed?for?the?adaptive?and?adaptivereg?methods
% -params.typeDetect:?(for?scalespace?method?only)?‘otsu‘
%???????????????????????????‘halfnormal‘‘empiricallaw‘‘mean‘‘kmeans‘
%
%?Outputs:
%???-ewt:?cell?containing?first?the?low?frequency?component?and
%?????????then?the?successives?frequency?subbands
%???-mfb:?cell?containing?the?filter?bank?(in?the?Fourier?domain)
%???-boundaries:?vector?containing?the?set?of?boundaries?corresponding
%????????????????to?the?Fourier?line?segmentation?(normalized?between
%????????????????0?and?Pi)
%
%?Author:?Jerome?Gilles
%?Institution:?UCLA?-?Department?of?Mathematics
%?Year:?2013
%?Version:?2.0
%?=========================================================================

%%?Boundary?detection
%?We?compute?the?Fourier?transform?of?f
ff=fft(f);
%?We?extract?the?boundaries?of?Fourier?segments
boundaries?=?EWT_Boundaries_Detect(abs(ff(1:round(length(ff)/2)))params);
boundaries?=?boundaries*pi/round(length(ff)/2);

%%?Filtering
%?We?extend?the?signal?by?miroring?to?deal?with?the?boundaries
l=round(length(f)/2);
f=[f(l-1:-1:1);f;f(end:-1:end-l+1)];
ff=fft(f);

%?We?build?the?corresponding?filter?bank
mfb=EWT_Meyer_FilterBank(boundarieslength(ff));

%?We?filter?the?signal?to?extract?each?subband
ewt=cell(length(mfb)1);
for?k=1:length(mfb)
????ewt{k}=real(ifft(conj(mfb{k}).*ff));
????ewt{k}=ewt{k}(l:end-l);
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-07-29?09:51??EWT20161130\
?????目錄???????????0??2019-07-26?16:45??EWT20161130\EWT\
?????目錄???????????0??2019-07-26?16:45??EWT20161130\EWT\1D\
?????文件?????????162??2016-12-01?01:53??EWT20161130\EWT\1D\EWT_beta.m
?????文件????????1732??2016-12-01?01:53??EWT20161130\EWT\1D\EWT_InstantaneousComponents.m
?????文件????????1474??2016-12-01?01:53??EWT20161130\EWT\1D\EWT_Meyer_FilterBank.m
?????文件?????????920??2016-12-01?01:53??EWT20161130\EWT\1D\EWT_Meyer_Scaling.m
?????文件????????1325??2016-12-01?01:53??EWT20161130\EWT\1D\EWT_Meyer_Wavelet.m
?????文件??????????93??2016-12-01?01:53??EWT20161130\EWT\1D\EWT_Single_filter.m
?????文件????????2825??2016-12-01?01:53??EWT20161130\EWT\1D\EWT1D.m
?????文件?????????841??2016-12-01?01:53??EWT20161130\EWT\1D\iEWT1D.m
?????文件????????1628??2016-12-01?01:53??EWT20161130\EWT\1D\IFcleaning.m
?????文件?????????749??2016-12-01?01:53??EWT20161130\EWT\1D\Modes_EWT1D.m
?????目錄???????????0??2019-07-26?16:45??EWT20161130\EWT\2D\
?????目錄???????????0??2019-07-26?16:45??EWT20161130\EWT\2D\Curvelet\
?????文件????????1442??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\AnglesLocalMax.m
?????文件????????2182??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\AnglesLocalMaxMin.m
?????文件????????8620??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\Angular_sector.m
?????文件????????1288??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\CreateAngleGrid.m
?????文件????????2674??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\EWT_Angles_Detect.m
?????文件????????8376??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\EWT2D_Curvelet.m
?????文件????????7085??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\EWT2D_Curvelet_FilterBank.m
?????文件?????????971??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\EWT2D_Curvelet_Scaling.m
?????文件?????????856??2016-12-01?01:53??EWT20161130\EWT\2D\Curvelet\iEWT2D_Curvelet.m
?????目錄???????????0??2019-07-26?16:45??EWT20161130\EWT\2D\Littlewood-Paley\
?????文件????????3226??2016-12-01?01:53??EWT20161130\EWT\2D\Littlewood-Paley\EWT2D_LittlewoodPaley.m
?????文件????????1529??2016-12-01?01:53??EWT20161130\EWT\2D\Littlewood-Paley\EWT2D_Meyer_FilterBank.m
?????文件????????1011??2016-12-01?01:53??EWT20161130\EWT\2D\Littlewood-Paley\EWT2D_Meyer_Scaling.m
?????文件????????1410??2016-12-01?01:53??EWT20161130\EWT\2D\Littlewood-Paley\EWT2D_Meyer_Wavelet.m
?????文件????????1175??2016-12-01?01:53??EWT20161130\EWT\2D\Littlewood-Paley\EWT2D_UP_Meyer_Wavelet.m
?????文件????????1144??2016-12-01?01:53??EWT20161130\EWT\2D\Littlewood-Paley\iEWT2D_LittlewoodPaley.m
............此處省略88個文件信息

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