脆弱水印相关算法及代码实现

脆弱水印算法，基于matlab的代码实现

%%%%%%%%%%%
%file_name=‘shuiy.jpg‘;
%message=double（imread（file_name））;
%mm=size（message1）;
%nm=size（message2）;
%%%%%%%%%%%
file_name=‘dwt_watermarked.bmp‘;
watermarked_image=double（imread（file_name））;
% watermarked_image（80:101177:184）=255;
% watermarked_image（84:10585:93）=255;
% watermarked_image（14:23105:151）=255;
% watermarked_image（105:134241:248）=255;
% imshow（uint8（watermarked_image））;
mw=size（watermarked_image1）;
nw=size（watermarked_image2）;
[ca1ch1cv1cd1]=dwt2（watermarked_image‘haar‘）;
file_name=‘eee.bmp‘;
cover_object=double（imread（file_name））;
[ca2ch2cv2cd2]=dwt2（cover_object‘haar‘）;
watermarkr=ca1-ca2;

watermark=ones（mm）;
for i=1:mm
    for j=1:nm
        if（watermarkr（ij）~=0）
        watermark（ij）=0;
        end
    end
end
watermark=uint8（watermark）;
figure
imshow（watermark[]）;
title（‘recovered watermark‘）

orig_watermark=imread（‘shuiy3.bmp‘）;
sim=corr2（orig_watermarkwatermark）
imwrite（watermark‘watermark_r.jpg‘‘jpg‘）;

 属性            大小     日期    时间   名称
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     目录          0  2008-12-29 23:41  DWT域脆弱水印

     文件       1005  2008-11-30 22:35  DWT域脆弱水印\dwtshuiyintiqu.m

     文件        969  2008-12-24 17:14  DWT域脆弱水印\dwtshuiyinzhizuo.m

    ..A.SH.     39936  2008-12-29 23:41  DWT域脆弱水印\Thumbs.db

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