%?KSVD?running?file
%?in?this?file?a?synthetic?test?of?the?K-SVD?algorithm?is?performed.?First
%?a?random?dictionary?with?normalized?columns?is?being?generated?and?then
%?a?set?of?data?signals?each?as?a?linear?combination?of?3?dictionary
%?element?is?created?with?noise?level?of?20SNR.?this?set?is?given?as?input
%?to?the?K-SVD?algorithm.

%?a?different?mode?for?activating?the?K-SVD?algorithm?is?until?a?fixed
%?error?is?reached?in?the?Sparse?coding?stage?instead?until?a?fixed?number?of?coefficients?is?found
%?（it?was?used?by?us?for?the
%?denoising?experiments）.?in?order?to?switch?between?those?two?modes?just
%?change?the?param.errorFlag?（0?-?for?fixed?number?of?coefficients?1?-
%?until?a?certain?error?is?reached）.



param.L?=?4;???%?number?of?elements?in?each?linear?combination.
param.K?=?10;?%?number?of?dictionary?elements
param.numIteration?=?30;?%?number?of?iteration?to?execute?the?K-SVD?algorithm.

param.errorFlag?=?0;?%?decompose?signals?until?a?certain?error?is?reached.?do?not?use?fix?number?of?coefficients.
%param.errorGoal?=?sigma;
param.preserveDCAtom?=?0;

%%%%%%%?creating?the?data?to?train?on?%%%%%%%%
N?=?20;?%?number?of?signals?to?generate
n?=?4;???%?dimension?of?each?data
%?SNRdB?=?20;?%?level?of?noise?to?be?added
%?[param.TrueDictionary?D?x]?=?gererateSyntheticDictionaryAndData（N?param.L?n?param.K?SNRdB）;
?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%%%%%%%%?initial?dictionary:?Dictionary?elements?%%%%%%%%
D=randn（420）;
%?D?=[????0.9736????0.0777????0.2600????0.0620???-0.2304???-0.7423???-0.5626???-0.3611;
%????-1.6218???-1.4809???-1.3147????1.3018????2.1225???-0.4863???-1.4601????0.4708;
%?????0.9989????0.6580????0.1184????0.3662???-1.4400???-0.3024????0.3116????1.0625;
%?????1.5201????0.2445????0.8431???-0.9663????0.7049???-0.1089???-1.5096???-1.5038]
param.InitializationMethod?=??‘GivenMatrix‘;%不需要初始字典
?param.initialDictionary=ones（410）;

param.displayProgress?=?1;
disp（‘Starting?to??train?the?dictionary‘）;

[Dictionaryoutput]??=?KSVD（Dparam）;

%?disp（[‘The?KSVD?algorithm?retrived?‘num2str（output.ratio（end））‘?atoms?from?the?original?dictionary‘]）;

%?[Dictionaryoutput]??=?MOD（Dparam）;

%?disp（[‘The?MOD?algorithm?retrived?‘num2str（output.ratio（end））‘?atoms?from?the?original?dictionary‘]）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????12292??2009-12-03?08:02??KSVD.m

?????文件????????954??2007-04-29?10:17??OMP.m

?????文件???????2326??2009-12-05?10:32??demo1.m

?????文件???????1896??2009-12-03?07:43??gererateSyntheticDictionaryAndData.m

-----------?---------??----------?-----??----

????????????????17468????????????????????4