www.gusucode.com > 基于视觉显著性的多波段图像融合方法matlab > 基于视觉显著性的多波段图像融合方法matlab/reduce.m
function out = reduce(input) % smoothing filter a = 0.4; b = 0.25; c = 0.05; h = [c b a b c]; hp = conv2(h,h'); [m,n] = size( input ); mo = m/2; no = n/2; sym_input(m+4,n+4) = 0; sym_input(3:m+2,3:n+2) = input; sym_input(1,3:n+2) = 2*input(1,:)-input(3,:); sym_input(2,3:n+2) = 2*input(1,:)-input(2,:); sym_input(m+4,3:n+2) = 2*input(m,:)-input(m-2,:); sym_input(m+3,3:n+2) = 2*input(m,:)-input(m-1,:); sym_input(3:m+2,1) = 2*input(:,1)-input(:,3); sym_input(3:m+2,2) = 2*input(:,1)-input(:,2); sym_input(3:m+2,n+4) = 2*input(:,n)-input(:,n-2); sym_input(3:m+2,n+3) = 2*input(:,n)-input(:,n-1); out = conv2(sym_input,hp,'same'); out = out(3:2:end-2,3:2:end-2);