diff util/small_to_unloc.m @ 244:5c8bcdadb380 unlocbox

added UNLocBox interface, example and a 128x128 Lena

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/small_to_unloc.m	Tue Sep 04 11:00:36 2012 +0100
@@ -0,0 +1,43 @@
+function [b2,f1,f2,param] = small_to_unloc(b,A,param)
+    
+
+    if nargin<3, param=struct; end
+    % set parameters
+    if ~isfield(param, 'verbose'), param.verbose = 0; end
+    if ~isfield(param, 'T'), param.T = 1; end
+    if ~isfield(param, 'gamma'), param.gamma = 1/(1.1*norm(A)^2); end
+    if ~isfield(param, 'sigma'), param.sigma = 1; end
+    
+    
+    %set function f2
+    param_f2.verbose=param.verbose;
+    param_f2.A=@(x) A*x;
+    param_f2.At=@(x) A'*x;
+    param_f2.y=b;
+    param_f2.tight=0;
+    param_f2.nu=norm(A,2)^2;
+    param_f2.epsilon=param.sigma;
+    
+    f2.prox= @(x,l) fast_proj_B2(x,l,param_f2); % douglas rachford, admm
+    f2.grad= @(x) 2*A'*(A*x-b); %forward backward
+    f2.x0=A'*b;
+    f2.norm=@(x) 0;
+    
+    
+    
+    
+    %set function f1
+    param_f1.verbose=param.verbose;
+    
+    f1.x0=A'*b;
+    f1.norm= @(x) sum(sum(abs(x)));
+    f1.prox= @(x,l) prox_L1(x,param.T*l,param_f1);
+    
+    
+    
+    %set initial point
+    b2=A'*b;
+    
+    
+end
+