hide15.m

关于图像隐藏的几个例程。属于matlab图像处理的内容

function hide()
B=imread('E:\chan\mat\b.bmp','bmp');
imshow(B);pause;close;
[Bx,By,Bz]=size(B);
C=imread('E:\chan\mat\cc.bmp','bmp');
imshow(C);pause;close;
[Cx,Cy,Cz]=size(C);
%%检测
imshow(bitand(B,240));pause;close;
E=bitand(C,240);
F=bitor(bitshift(bitand(C,240),-4),240);
imshow(E);pause;close;
imshow(F);pause;close; 
%%扩展C
CC1=zeros(Bx-Cx,Cy,Bz);
C=[C;CC1];
CC2=zeros(Bx,By-Cy,Bz);
C=[C,CC2];         
%%隐藏开始
D=bitor(bitand(B,240),bitshift(bitand(C,240),-4));
imshow(D);pause;close;
imwrite(D,'E:\chan\mat\d.bmp')
 %%提取
U=bitshift((bitand(D,15)),4);
U=U(1:Cx,1:Cy,1:Cz);
size(U);
imshow(U);pause;close;
imwrite(U,'E:\chan\mat\e.bmp')
sprintf('ok')