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function value = func_MyDescendant(i, j, type, m) 
% Matlab implementation of SPIHT (without Arithmatic coding stage) 
% 
% Find the descendant with largest absolute value of pixel (i,j) 
% 
% input:    i : row coordinate 
%           j : column coordinate 
%           type : type of descendant 
%           m : whole image 
% 
% output:   value : largest absolute value 
% 
% Jing Tian 
% Contact me : scuteejtian@hotmail.com 
% This program is part of my undergraduate project in GuangZhou, P. R. China. 
% April - July 1999 
 
s = size(m,1); 
 
S = []; 
 
index = 0; a = 0; b = 0; 
 
while ((2*i-1)