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 % % % 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 %