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