qproject.m

来自「采用matlab编写的数字图像恢复程序」· M 代码 · 共 12 行

  function Qv = Qproject(v,p0)

%  Qv = Qproject(v,p0)
%
%  Compute Q*v, where Q = I-P and P is the "coarse grid projection matrix".
%  p0 is the level of the coarse grid.

  n = max(size(v));
  p = log2(n);
  Pv = prolong(restrict(v,p-p0),p-p0);
  Qv = v - Pv;