function?[Ax]=?KSVD_online（ycodebook_sizeL）?
%==============================?
%input?parameter?
%?y?-?input?signal?
%?codebook_size?-?count?of?atoms?
%output?parameter?
%?A?-?dictionary?
%?x?-?coefficent?

%==============================?
if（size（y2）???disp（‘codebook_size?is?too?large?or?training?samples?is?too?small‘）;?
???return;?
end?
%?initialization?
[rowscols]=size（y）;
?r=randperm（cols）;?
A=y（:r（1:codebook_size））;?
A=A./repmat（sqrt（sum（A.^21））rows1）;?
ksvd_iter=10;?
for?k=1:ksvd_iter?
?%?sparse?coding?
????????x=OMP_online（AyL）;?
??%?update?dictionary?
????for?m=1:codebook_size?
???????mindex=find（x（m:））;?
???????if?~isempty（mindex）?
????????????mx=x（:mindex）;?mx（m:）=0;?my=A*mx;?resy=y（:mindex）;?

????????????mE=resy-my;?[usv]=svds（mE1）;?A（:m）=u;?x（mmindex）=s*v‘;
???????end?
????end?
?%?sparse?coding?
??????x=OMP_online（AyL）;?
end

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件????????923??2013-12-10?22:49??k-svd_second\KSVD_online.m

?????文件???????1682??2013-12-10?22:53??k-svd_second\ksvd_online_main.m

?????文件???????1081??2013-12-10?21:42??k-svd_second\OMPerr_online.m

?????文件????????958??2013-12-10?17:18??k-svd_second\OMP_online.m

?????文件??????44607??2003-01-26?01:03??k-svd_second\rice.png

?????目錄??????????0??2014-04-25?10:35??k-svd_second

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

????????????????49251????????????????????6