makedwttile.m

SPIHT coding implementation. using wavelet transforms as a key tool. compression and decoding is don

function [W] = MakeDwtTile(Image, level, Lo_D, Hi_D)
% MakeDwtTile - decomposition tile generator using matlab std. functions
%
% parameters:   Image   - source image
%               level   - decomposition depth
%               Lo_D    - low pass DWT filter coefs
%               Hi_D    - high pass DWT filter coefs
% output:       W - tile matrix

im_size=size(Image, 1);

[C,S] = wavedec2(Image,level,Lo_D,Hi_D); 

A = appcoef2(C,S,Lo_D, Hi_D, level);

W = A;

for i=level:-1:1
    % one-level square
    [H,V,D] = detcoef2('all',C,S,i);
    
    W = [[W H]; [V D]];
end