www.gusucode.com > 小波变换的数字水印matlab源码程序 > new_wavelet/jian.m

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%im1=double(imread('goldhill.bmp'));
%im1=imread('boat.bmp');
im1=imread('Add_Water_Image.bmp');
addwaterimage1=im1;
jianqie4 = zeros(512,512);
jianqie4(129:384,129:384) = addwaterimage1(129:384,129:384);

imwrite(uint8(jianqie4),'jianqie1.bmp')
IM=imread('barbara_512.bmp');
PSNR11=psnr(IM,jianqie4)

% addwaterimage2=im1;
% addwaterimage2(257:512,257:512)=zeros(256,256);
% imwrite(uint8(addwaterimage2),'jianqie2.bmp')
% PSNR12=psnr(IM,addwaterimage2)
% 
% addwaterimage3=im1;
% addwaterimage3(1:256,1:256)=zeros(256,256);
% imwrite(uint8(addwaterimage3),'jianqie3.bmp')
% PSNR13=psnr(IM,addwaterimage3)
% 
% addwaterimage4=im1;
%  addwaterimage4(1:256,1:256)=zeros(256,256);
%  addwaterimage4(200:400,220:400)=zeros(201,181);
%  addwaterimage4(300:500,400:500)=zeros(201,101);
%  addwaterimage4(300:500,100:200)=zeros(201,101);
% 
% imwrite(uint8(addwaterimage4),'jianqie4.bmp')
% IM=imread('lena512.bmp');
% PSNR14=psnr(IM,addwaterimage4)