MATLAB图像的加密与水印处理程序

基于Arnold变换的图像加密： 记住把注释掉的程序单独写个M文件，放在同一路径下
clc;clear;close all;
randoma=input('请输入用户指令：','s');%
P=randoma;
%P=str2num(P);
if (P=='*****')
tu=uigetfile();
I=imread(tu);
imshow(tu);hold on;
%imshow('tu');
[M,N,P]=size(I);
rand('state',0);
% randoma=input('请输入用户指令：');%
% P=randoma;
% if (P==3.14)
T=96;
R=rand(M,N)*pi*2;
xlswrite('R.xls',R);
%kk=xlsread('jjm.xls');%32 43 55 63
a1=input('请输入a1:');
a2=input('请输入a2:');
a3=input('请输入a3:');
a4=input('请输入a4:');
kk=[a1,a2,a3,a4];
xlswrite('kk.xls',kk);
%%

I=double(I);
Ie=encrypt(I,R,kk);
figure;
imshow(Ie,[]);

%%
%%加密图像 其中调用了encrypt函数
%function Ie=encrypt(I,R,kk);
%Ir=I(:,:,1);Ig=I(:,:,2);Ib=I(:,:,3);
% [Xr,Xg,Xb]=Tmatrix(Ir,Ig,Ib,R);
% I1r=blkart2a(Xr,kk);I1g=blkart2a(Xg,kk);I1b=blkart2a(Xb,kk);
% I0r=dct2(I1r);I0g=dct2(I1g);I0b=dct2(I1b);
% [X1r,X1g,X1b]=Tmatrix(I0r,I0g,I0b,R);
% I2r=blkart2a(X1r,kk);I2g=blkart2a(X1g,kk);I2b=blkart2a(X1b,kk);
% I3r=idct2(I2r);I3g=idct2(I2g);I3b=idct2(I2b);
% Ie(:,:,1)=I3r;Ie(:,:,2)=I3g;Ie(:,:,3)=I3b;

% [Xr,Xg,Xb]=Tmatrix(Ir,Ig,Ib,R);
% Xr=Ir.*cos(R)+Ig.*sin(R).^2-Ib.*sin(R).*cos(R);
% Xg=-Ir.*sin(R)+Ig.*sin(R).*cos(R)-Ib.*cos(R).^2;
% Xb=Ig.*cos(R)+Ib.*sin(R);

a1=input('请输入a1:');
a2=input('请输入a2:');
a3=input('请输入a3:');
a4=input('请输入a4:');
kk=[a1,a2,a3,a4];
R=uigetfile();
R=xlsread('R.xls');
%%

Ii=decrypt(Ie,R,kk);
Ii=Ii-min(Ii(:));Ii=Ii/max(Ii(:));
h = waitbar(0,'Please wait...');
steps = 600;
for step = 1:steps
%figure;imshow(Ii,[]);
waitbar(step / steps)
end
close(h)
figure;imshow(Ii,[]);
h = waitbar(1,'完成解密','color','');
steps = 1;
for step = 1:steps
h = waitbar(1,'finish!','color','');
end
close(h);
warning off
end
%%
%%解密图像，调用decrypt函数
% function J=decrypt(Ie,R,kk);
% T=96; % period of Arnold transform
% J2r=Ie(:,:,1);J2g=Ie(:,:,2);J2b=Ie(:,:,3);
% J2r=dct2(J2r);J2g=dct2(J2g);J2b=dct2(J2b);
% Y1r=blkart2a(J2r,T-kk);Y1g=blkart2a(J2g,T-kk);Y1b=blkart2a(J2b,T-kk);
% [J0r,J0g,J0b]=iTmatrix(Y1r,Y1g,Y1b,R);
% J1r=idct2(J0r);J1g=idct2(J0g);J1b=idct2(J0b);
% Yr=blkart2a(J1r,T-kk);Yg=blkart2a(J1g,T-kk);Yb=blkart2a(J1b,T-kk);
% [Jr,Jg,Jb]=iTmatrix(Yr,Yg,Yb,R);
% J(:,:,1)=Jr;J(:,:,2)=Jg;J(:,:,3)=Jb;

对不起