www.gusucode.com > 压缩感知重构算法 压缩感知源码程序 > iconv.m
function y = iconv(f,x) % iconv -- Convolution Tool for Two-Scale Transform % Usage % y = iconv(f,x) % Inputs % f filter % x 1-d signal % Outputs % y filtered result % % Description % Filtering by periodic convolution of x with f % % See Also % aconv, UpDyadHi, UpDyadLo, DownDyadHi, DownDyadLo % n = length(x); p = length(f); if p <= n, xpadded = [x((n+1-p):n) x]; else z = zeros(1,p); for i=1:p, imod = 1 + rem(p*n -p + i-1,n); z(i) = x(imod); end xpadded = [z x]; end ypadded = filter(f,1,xpadded); y = ypadded((p+1):(n+p)); % % 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 %