huifu.m

图像置乱

function G = huifu(S,X,F)

[m n] = size(S);
S = double(S);
F = double(F);

for i = 1:m
    for j = 1:n
        G(i,j) = [S(i,j) - (1-X)*F(i,j)]/X;
    end
end