?size=256;?N=32;K=8;?D=zeros（size）;E=0.01;F=32;%表示嵌入深度，D是256x256的0矩陣
??I=imread（‘lena256.bmp‘）;
??subplot（221）;
??imshow（I）;
??title（‘原始圖像‘）;
??I=double（I）/512;%分成一個8x8的網格
??
%讀入水印
??J=imread（‘smile.bmp‘）;
??J=rgb2gray（J）;?????%將真彩色圖像轉換成灰度圖像
??J=im2bw（J0.5）;
??subplot（222）;
??imshow（J）;
?title（‘水印圖像‘）;
?
?%對水印縮放
?J=double（imresize（J[3232]））;%?J=double（imresize（J[3232]））;
?subplot（223）;
?imshow（J）;
title（‘縮放水印圖像‘）;

?%嵌入水印
?for?p=1:size/K
?????for?q=1:size/K
????????x=（p-1）*K+1;?
????????y=（q-1）*K+1;
????????I_dct=I（x:x+K-1y:y+K-1）;%分成8x8的塊被分成了32x32塊
????????I_dct1=dct2（I_dct）;
????????if?J（pq）==0%J是二值化后的水印圖象
????????????alfa=-1;
????????else
???????????alfa=1;
????????end
???????I_dct2=I_dct1+alfa*E;
???????I_dct=idct2（I_dct2）;%逆DCT變換
??????

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

?????文件???????2387??2012-11-30?12:00??DCTandFFT\DCT.m

?????文件???????3208??2012-11-30?13:23??DCTandFFT\FFT.asv

?????文件???????3632??2012-11-30?13:49??DCTandFFT\FFT.m

?????文件??????66614??2011-11-30?10:42??DCTandFFT\lena256.bmp

?????文件?????196664??2012-11-28?16:44??DCTandFFT\shizi.bmp

?????文件???????2151??2012-11-30?10:13??DCTandFFT\shuiyin.asv

?????文件??????12342??2012-11-28?10:17??DCTandFFT\smile.bmp

?????文件??????12342??2008-05-03?15:14??DCTandFFT\watermark.bmp

????..A.SH.???????162??2012-11-30?12:56??DCTandFFT\~$DCT的數字水印算法.doc

?????文件??????19102??2012-11-29?23:24??DCTandFFT\注釋.docx

?????文件??????66614??2002-11-20?09:46??LSB\lena.bmp

?????文件???????1865??2011-05-11?16:26??LSB\lsb_embed.asv

?????文件???????1470??2012-11-30?15:20??LSB\lsb_embed.m

?????文件???????2114??2012-11-30?15:21??LSB\lsb_recover.asv

?????文件???????1770??2012-11-30?15:22??LSB\lsb_recover.m

?????文件??????66614??2012-11-30?15:28??LSB\lsb_watermarked.bmp

?????文件????????300??2011-05-11?16:51??LSB\PSNR.asv

?????文件????????855??2011-05-11?17:03??LSB\PSNR.m

?????文件??????12342??2012-11-28?10:17??LSB\smile.bmp

?????文件?????134549??2012-12-02?10:54??唐毅_100410407.docx

?????文件??????41984??2012-11-27?17:49??唐毅_100410407任務書.doc

?????目錄??????????0??2012-11-30?12:56??DCTandFFT

?????目錄??????????0??2012-11-30?15:01??LSB

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

???????????????649081????????????????????23