hide2.m

关于图像隐藏的几个例程。属于matlab图像处理的内容

function hide()
m=0;
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);
for i=1:Cx    %%以下12行检测
    for j=1:Cy
        for k=1:Cz
            b=bitand(C(i,j,k),240);
            E(i,j,k)=b;
            cc=bitor(bitshift(bitand(C(i,j,k),240),-4),240);
            F(i,j,k)=cc;
        end
    end
end
imshow(E);pause;close;
imshow(F);pause;close;
for i=1:Bx               %%隐藏开始
    for j=1:By
        for k=1:Bz
            if (i<=Cx)&(j<=Cy)&(k<=Cz)
               b=bitand(B(fix(m/100)+i,(m-(fix(m/100))*100)+j,k),240);
               c=bitshift(bitand(C(i,j,k),240),-4);
               B((fix(m/100))+i,(m-(fix(m/100))*100)+j,k)=bitor(b,c);
           end
        end
    end
end
D=B;
imshow(D);pause;close;
imwrite(D,'E:\chan\mat\d.bmp')
n=input('please input the unlock password:');
U=zeros(Cx,Cy,Cz);
for i=1:Cx               %%提取
    for j=1:Cy
        for k=1:Cz 
            U(i,j,k)=bitshift((bitand(D(i+(fix(n/100)),j+(n-(fix(n/100))*100),k),15)),4);
        end
    end
end
size(U)
U=uint8(U);
imwrite(U,'E:\chan\mat\e.bmp')
imshow(U);pause;close;