annotate DL/Majorization Minimization DL/ExactDicoRecovery/dict_update_KSVD_cn.m @ 239:71128ec3e532 ver_2.0_beta

added documentation file/folder
author luisf <luis.figueira@eecs.qmul.ac.uk>
date Wed, 25 Apr 2012 13:06:28 +0100
parents b14209313ba4
children
rev   line source
ivan@155 1 function[Phiout,unhatnz] = dict_update_KSVD_cn(Phi,x,unhat)
ivan@155 2 %% K-SVD Dictionary Learning with the constraint on the column norms %%%%%
ivan@155 3
ivan@155 4 %%
ivan@155 5 unhatn = unhat;
ivan@155 6 rPerm = randperm(size(Phi,2));
ivan@155 7 %% for l = 1:size(Phi,2),
ivan@155 8 for l = rPerm
ivan@155 9 unhatns = unhat;
ivan@155 10 unhatns(l,:) = zeros(1,size(unhat,2));
ivan@155 11 E = x-Phi*unhatns;
ivan@155 12 ER = E(:,(abs(unhat(l,:))>0));
ivan@155 13 [U,S,V] = svd(ER,0);
ivan@155 14 Phi(:,l) = U(:,1)
ivan@155 15 unhatn(l,:) = zeros(1,size(unhat,2));
ivan@155 16 unhatn(l,(abs(unhat(l,:))>0)) = S(1,1)*V(:,1);
ivan@155 17 unhat = unhatn;
ivan@155 18 end
ivan@155 19 %%
ivan@155 20 unhatnz = unhat;
ivan@155 21 Phiout = Phi;
ivan@155 22 end