fenkuai.m

数字水印嵌入和提取算法 包含时空域和变换域的算法的matlab实现

function [block,av]=fenkuai(d)

[m,n]=size(d);
for i=1:m/4
    for j=1:n/4
        block(1:4,1:4,i,j)=d((i-1)*4+1:i*4,(j-1)*4+1:j*4);
        av(i,j)=sum(sum(block(:,:,i,j)))/16;
    end
end