zhiluan.m

图像置乱

function image = zhiluan(S1,S2)

[m n] = size(S1);
temp = zeros(m,n);

%取出S1的奇数行进行顺序奇数行插值

M = 1;
for i = 1:2:m
    temp(2*M-1,:) = S1(i,:);
    M = M+1;
end

%取出S2的偶数行进行偶数行逆插值

N = 1;
[m n] = size(S2);
for i = n:-2:2
    temp(2*N,:) = S2(i,:);
    N = N+1;
end

%对temp的列进行偶数列的逆插值

image = temp;
M_lie = 1;
for j = n:-2:2
    image(:,2*M_lie) = temp(:,j);
    M_lie = M_lie+1;
end

%得到置乱后的图像image