checkdescendants.m

EZW implementation which will use wavelet transforms and do the compression decompression using EZW

function   result = checkdescendants(j,X,threshold,result)
% initial set result=0
% if the result=1, means that a coefficient has at least 1 significant descendant.
global N
[m,n]=size(N);
for i=(4*j-3):4*j;
    if result==1 | i>m, 
        break;
    end;
    if abs(X(N(i,1),N(i,2)))>=threshold
        result=1;
        break; 
    else 
        result=checkdescendants(i,X,threshold,result);
    end;
end;