www.gusucode.com > 图像融合工具箱 > 图像融合工具箱/fusetool11/dec.m
function Y = dec(X,w); %Y = dec(X) downsampling of a matrix % % X - input matrix % w - choose rows or columns % w == 1: downsample rows by 2 % w == 2: downsample columns by 2 % % Y - output matrix % (Oliver Rockinger 16.08.99) [a b] = size(X); if w == 1 Y = X(1:2:a, :); else Y = X(:, 1:2:b); end;