www.gusucode.com > 压缩感知重构算法 压缩感知源码程序 > DownDyadLo.m

    function d = DownDyadLo(x,qmf)
% DownDyadLo -- Lo-Pass Downsampling operator (periodized)
%  Usage
%    d = DownDyadLo(x,f)
%  Inputs
%    x    1-d signal at fine scale
%    f    filter
%  Outputs
%    y    1-d signal at coarse scale
%
%  See Also
%    DownDyadHi, UpDyadHi, UpDyadLo, FWT_PO, aconv
%
	d = aconv(qmf,x);
	n = length(d);
	d = d(1:2:(n-1));

    
%
% Copyright (c) 2006. David Donoho
%  

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% Part of SparseLab Version:100
% Created Tuesday March 28, 2006
% This is Copyrighted Material
% For Copying permissions see COPYING.m
% Comments? e-mail sparselab@stanford.edu
%