bit_dec.m

multi_wavelet An Image Digital Watermarking Algorithm Based on Bit-Plane-Decomposition and Multi-

%灰度图象水印的位平面分解程序
function WW=bit_dec(coef)

M=size(coef,1);
WW=zeros(M,M,8);
for l=1:8 %位平面的层号
  for m=1:M  %M为系数矩阵的尺寸
    for n=1:M
        if    mod(fix(coef(m,n)/2^(l-1)),2)==1
              WW(m,n,l)=1;
        else  WW(m,n,l)=0;
        end
       
    end
  end
end