flw.rar_图像 隐藏_图像隐藏

function hide() mm=input('please input the lock password:'); B=imread('E:\chan\mat\gh7.jpg','jpg'); imshow(B);pause;close; [Bx,By,Bz]=size(B); CC=imread('E:\chan\mat\wsq.bmp','bmp'); imshow(CC);pause;close; [Cx,Cy,Cz]=size(CC); %%密码分解 m(1)=fix(mm/1000); m(2)=fix((mm-m(1)*1000)/100); m(3)=fix((mm-m(1)*1000-m(2)*100)/10); m(4)=mm-m(1)*1000-m(2)*100-m(3)*10; m=m.*10 %%构建C for i=8:5 C(i)=bitget(CC,i); C1=zeros(Cx,m(9-i),Bz); C(i)=[C1,C(i)]; C2=zeros(m(9-i),m(9-i)+Cy,Bz); C(i)=[C2;C(i)]; CC1=zeros(Bx-Cx-m(9-i),Cy+m(9-i),Bz); C(i)=[C(i);CC1]; CC2=zeros(Bx,By-Cy-m(9-i),Bz); C(i)=[C(i),CC2].*2^i; C(i)=uint8(C(i)); imshow(C(i));pause;close; end %%隐藏 D=bitand(B,240); for i=1:4 bb(i)=bitget(B,i); bb(i,((m(i)+1):(m(i)+Cx)),((m(i)+1):(m(i)+Cy)),1:Bz)=bitand(bb(i,((m(i)+1):(m(i)+Cx)),((m(i)+1):(m(i)+Cy)),1:Bz),240); c=bitshift(bitand(C(9-i),240),-4); DD(i)=bitor(b,c); D=D+DD(i).*2^i; end imshow(D);pause;close; imwrite(D,'E:\chan\mat\d.bmp') D=imread('E:\chan\mat\d.bmp','bmp'); %%输解码 n=input('please input the unlock password:'); for i=1:100000 if n==m break else sprintf('put the wrong unlock password!!!') n=input('please input the correct unlock password:'); end end %%提取 n1=fix(n/100); n2=n-(fix(n/100))*100; U=bitshift((bitand(D,15)),4); U=U((n1+1):(n1+Cx),(n2+1):(n2+Cy),1:Cz); imwrite(U,'E:\chan\mat\e.bmp') imshow(U);pause;close; sprintf('ok')