资源简介
经典的稀疏表示SRC算法,适合广大人脸识别的同学使用参考-The classic sparse representation SRC algorithm
代码片段和文件信息
function [xx_debiasobjectivetimesdebias_startmses]= ...
GPSR_Basic(yAtauvarargin)
%
% GPSR_Basic version 5.0 December 4 2007
%
% This function solves the convex problem
% arg min_x = 0.5*|| y - A x ||_2^2 + tau || x ||_1
% using the algorithm GPSR-Basic described in the following paper
%
% “Gradient Projection for Sparse Reconstruction: Application
% to Compressed Sensing and Other Inverse Problems“
% by Mario A. T. Figueiredo Robert D. Nowak Stephen J. Wright
% Journal of Selected Topics on Signal Processing December 2007
% (to appear).
%
% -----------------------------------------------------------------------
% Copyright (2007): Mario Figueiredo Robert Nowak Stephen Wright
%
% GPSR is distributed under the terms
% of the GNU General Public License 2.0.
%
% Permission to use copy modify and distribute this software for
% any purpose without fee is hereby granted provided that this entire
% notice is included in all copies of any software which is or includes
% a copy or modification of this software and in all copies of the
% supporting documentation for such software.
% This software is being provided “as is“ without any express or
% implied warranty. In particular the authors do not make any
% representation or warranty of any kind concerning the merchantability
% of this software or its fitness for any particular purpose.“
% ----------------------------------------------------------------------
%
% Please check for the latest version of the code and paper at
% www.lx.it.pt/~mtf/GPSR
%
% ===== Required inputs =============
%
% y: 1D vector or 2D array (image) of observations
%
% A: if y and x are both 1D vectors A can be a
% k*n (where k is the size of y and n the size of x)
% matrix or a handle to a function that computes
% products of the form A*v for some vector v.
% In any other case (if y and/or x are 2D arrays)
% A has to be passed as a handle to a function which computes
% products of the form A*x; another handle to a function
% AT which computes products of the form A‘*x is also required
% in this case. The size of x is determined as the size
% of the result of applying AT.
%
% tau: usually a non-negative real parameter of the objective
% function (see above). It can also be an array the same
% size as x with non-negative entries; in this case
% the objective function weights differently each element
% of x that is it becomes
% 0.5*|| y - A x ||_2^2 + tau^T * abs(x)
%
% ===== Optional inputs =============
%
%
% ‘AT‘ = function handle for the function that implements
% the multiplication by the conjugate of A when A
% is a function handle. If A is an array AT is ignored.
%
% ‘StopCriterion‘ = type of stopping criterion to use
% 0 = algorithm stops when the relative
% change in the number of non-zero
% components o
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 21922 2008-01-15 16:22 SRC\GPSR_Basic.m
文件 4555 2010-07-14 14:01 SRC\SRC.m
目录 0 2014-09-27 11:39 SRC
----------- --------- ---------- ----- ----
26477 3
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