www.gusucode.com > matlab编程NSCT分解 图像融合 各个融合指标评价体系 分解源码程序 > matlab编程NSCT分解 图像融合 各个融合指标评价体系 分解源码程序/NSCT/nsfbdec.m
function [y0, y1] = nsfbdec( x, h0, h1, lev ) %不可分离的双通道非下采样滤波器组 % nsfbdec - computes the ns pyramid decomposition % at level lev with filters f1, f2 % y = nsfbdec(x,h0,h1,L) % INPUT: x image at finer scale % h0, h1 atrous filters obtained from 'atrousfilters' % OUTPUT: y1 - image at coarser scale, y2 - wavelet highpass output % % History % Adapted from atrousdec by Arthur Cunha % Modified on Aug 2004 by A. C. % Modified on Oct 2004 by A. C. % SEE ALSO: ATROUSREC, ATROUSFILTERS if lev ~= 0 I2 = eye(2); % delay compensation shift = -2^(lev-1)*[1,1] + 2; L=2^lev; y0 = atrousc(symext(x,upsample2df(h0,lev),shift),h0,I2 * L); y1 = atrousc(symext(x,upsample2df(h1,lev),shift),h1,I2 * L); else % first Level shift = [1, 1]; % delay compensation y0 = conv2(symext(x,h0,shift),h0,'valid'); y1 = conv2(symext(x,h1,shift),h1,'valid'); end