I = [1     1     1     1     2     3     6     6
     1     1     2     1     4     5     6     8
     1     1     1     1    10    15     7     7
     1     1     1     1    20    25     7     7
    20    22    20    22     1     2     3     4
    20    22    22    20     5     6     7     8
    20    22    20    20     9    10    11    12
    22    22    20    20    13    14    15    16];
% 定義灰度圖像I
S = qtdecomp(I,5);
% 閾值為5的四叉樹分解
[vals,r,c] = qtgetblk(I,S,4) 
% 獲取當前4×4的圖像子塊
disp('vals(:,:,1):')
disp(vals(:,:,1))
disp('vals(:,:,2):')
disp(vals(:,:,2))
disp('r:')
disp(r)
disp('c:')
disp(c)