dezz.m

来自「JPEG图像压缩及解压 适用于MATLAB」· M 代码 · 共 14 行

function x = dezz(z)
% function x = dezz(z)
% undo zz.m (<z> is a vector, <x> a 8x8 block)
zi=[1   2   6   7  15  16  28  29
   3   5   8  14  17  27  30  43
   4   9  13  18  26  31  42  44
  10  12  19  25  32  41  45  54
  11  20  24  33  40  46  53  55
  21  23  34  39  47  52  56  61
  22  35  38  48  51  57  60  62
  36  37  49  50  58  59  63  64];% work on columns
zi = zi(:);
x = reshape(z(zi),8,8);