?? comp_idwiltiv.m
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function [coef2]=comp_idwiltiv(coef,a,M)%COMP_IDWILTIV Compute Inverse discrete Wilson transform type IV.% % This is a computational routine. Do not call it% directly.% Author : Peter SoendergaardN=size(coef,1)/M;W=size(coef,2);L=N*a;coef=reshape(coef,M,N,W);coef2=zeros(2*M,N,W);coef2(1:2:M,1:2:N,:) = exp(i*pi/4)/sqrt(2)*coef(1:2:M,1:2:N,:);coef2(2*M:-2:M+1,1:2:N,:) = exp(i*pi*3/4)/sqrt(2)*coef(1:2:M,1:2:N,:);coef2(1:2:M,2:2:N,:) = exp(-i*pi/4)/sqrt(2)*coef(1:2:M,2:2:N,:);coef2(2*M:-2:M+1,2:2:N,:) = exp(-i*pi*3/4)/sqrt(2)*coef(1:2:M,2:2:N,:);coef2(2:2:M,1:2:N,:) = exp(-i*pi/4)/sqrt(2)*coef(2:2:M,1:2:N,:);coef2(2*M-1:-2:M+1,1:2:N,:) = exp(-i*pi*3/4)/sqrt(2)*coef(2:2:M,1:2:N,:);coef2(2:2:M,2:2:N,:) = exp(i*pi/4)/sqrt(2)*coef(2:2:M,2:2:N,:);coef2(2*M-1:-2:M+1,2:2:N,:) = exp(i*pi*3/4)/sqrt(2)*coef(2:2:M,2:2:N,:);?? 快捷鍵說明
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