%%%%%%%%%%%
%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‘）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????目錄??????????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

-----------?---------??----------?-----??----

????????????????42128????????????????????5