idwt_2d.m

来自「小波压缩编码平台软件包」· M 代码 · 共 32 行

function Y = idwt_2D(A,H,V,D,wavelet)
%Y = idwt_2D(A,H,V,D,wavelet)
%Version: 1.00, Date: 2006/01/31, author: Nikola Sprljan
%Two-dimensional separable IDWT 
%
%Input:
% A,H,V,D - approximation signal, horizontal, vertical and diagonal details
%           signal
% wavelet - wavelet identification string, or wavelet data structure
%     
%Output: 
% Y - reconstructed matrix
%
%Uses:
% load_wavelet.m (Wavelet Toolbox)
% idwt_dim.m (Wavelet Toolbox)
%
%Example:
% Y = idwt_2D(A,H,V,D,'CDF_9x7');

%load the wavelet here
if (isstr(wavelet))
    wvf = load_wavelet(wavelet);
else
    wvf = wavelet;
end;

Y = [A H;V D];

Y = idwt_dim(Y,2,wvf); %rows
Y = idwt_dim(Y,1,wvf); %columns