main.m

quadtree implementation in matlab

% % Test program for Quadtree Encoding and Decoding of RGB image
clc, close all, clear all
thvec=[0.5,0.5,0.5];  % threshold for red,green and blue (values b/w 0 and 1)
picname='rafting.png';
I = imread(picname);  
[ir ic d]=size(I);    % size of I must be M-by-N-by-3
figure, image(I)          % original input image
title('\bfOriginal Image');
% % ----------------------------------
% % RGB Quadtree Encoding
[S,valRGB]=qt3ddecom(I,thvec);  %lossy encoding
% % OR
% [S,valRGB]=qt3ddecom(I);      %lossless encoding
% % ----------------------------------
% % RGB Quadtree Decoding
Iback=qtreergbdecode(S,valRGB);  %Iback is approximated (reconstructed) image  
IbackTrim=Iback(1:ir,1:ic,:); %trim to original image size
% % ----------------------------------
figure, image(IbackTrim); % decoded image
title('\bfQuadtree Decoded Image');

% % -------------------------------------------------------------------------
% % This program or any other program(s) supplied with it does not provide any
% % warranty direct or implied. This program is free to use/share for
% % non-commercial purpose only, for any other usage contact with author.
% % Kindly reference author.
% % Thanking you.
% % @ Copyright M Khan
% % Email: [e-mail]
% %        [e-mail] 
% % http://www.geocities.com/mak2000sw