基于MATLAB的魔方置乱算法图像加解密代码

以下是基于MATLAB的魔方置乱算法图像加解密代码：

% 魔方置乱算法图像加解密代码
% 加密过程：将图像按照魔方置乱算法进行置乱
% 解密过程：将置乱后的图像按照魔方置乱算法逆向置乱

% 读取原始图像
im = imread('lena.jpg');

% 置乱过程
% 定义置乱算法的移动方式
moves = [1 2 3; 4 5 6; 7 8 9];
% 定义置乱算法的移动次数
times = 10;
% 对每个 RGB 通道分别进行置乱
im_shuffle = zeros(size(im));
for c = 1:3
    % 将当前通道的图像转换成三维数组
    im_c = im(:,:,c);
    im_c = reshape(im_c, [3 3 size(im_c,1)/3 size(im_c,2)/3]);
    % 对每个 3x3 的块进行置乱
    for i = 1:size(im_c,3)
        for j = 1:size(im_c,4)
            % 对当前块进行指定次数的移动
            for k = 1:times
                move = moves(randi(9));
                switch move
                    case 1
                        im_c(:,:,i,j) = im_c([2 1 3],:,:,i,j);
                    case 2
                        im_c(:,:,i,j) = im_c(:,[2 1 3],:,i,j);
                    case 3
                        im_c(:,:,i,j) = im_c(:,:,[2 1 3],i,j);
                    case 4
                        im_c(:,:,i,j) = im_c(:,[3 2 1],:,i,j);
                    case 5
                        im_c(:,:,i,j) = im_c([3 2 1],:,:,i,j);
                    case 6
                        im_c(:,:,i,j) = im_c(:,:,[3 2 1],i,j);
                    case 7
                        im_c(:,:,i,j) = im_c([1 3 2],:,:,i,j);
                    case 8
                        im_c(:,:,i,j) = im_c(:,[1 3 2],:,i,j);
                    case 9
                        im_c(:,:,i,j) = im_c(:,:,[1 3 2],i,j);
                end
            end
        end
    end
    % 将置乱后的三维数组转换成二维数组
    im_shuffle(:,:,c) = reshape(im_c, [size(im_c,1)*size(im_c,3) size(im_c,2)*size(im_c,4)]);
end

% 解密过程
% 对每个 RGB 通道分别进行逆向置乱
im_decrypt = zeros(size(im));
for c = 1:3
    % 将当前通道的图像转换成三维数组
    im_c = im_shuffle(:,:,c);
    im_c = reshape(im_c, [3 3 size(im_c,1)/3 size(im_c,2)/3]);
    % 对每个 3x3 的块进行逆向置乱
    for i = 1:size(im_c,3)
        for j = 1:size(im_c,4)
            % 对当前块进行指定次数的逆向移动
            for k = 1:times
                move = moves(randi(9));
                switch move
                    case 1
                        im_c(:,:,i,j) = im_c([2 1 3],:,:,i,j);
                    case 2
                        im_c(:,:,i,j) = im_c(:,[2 1 3],:,i,j);
                    case 3
                        im_c(:,:,i,j) = im_c(:,:,[2 1 3],i,j);
                    case 4
                        im_c(:,:,i,j) = im_c(:,[3 2 1],:,i,j);
                    case 5
                        im_c(:,:,i,j) = im_c([3 2 1],:,:,i,j);
                    case 6
                        im_c(:,:,i,j) = im_c(:,:,[3 2 1],i,j);
                    case 7
                        im_c(:,:,i,j) = im_c([1 3 2],:,:,i,j);
                    case 8
                        im_c(:,:,i,j) = im_c(:,[1 3 2],:,i,j);
                    case 9
                        im_c(:,:,i,j) = im_c(:,:,[1 3 2],i,j);
                end
            end
        end
    end
    % 将逆向置乱后的三维数组转换成二维数组
    im_decrypt(:,:,c) = reshape(im_c, [size(im_c,1)*size(im_c,3) size(im_c,2)*size(im_c,4)]);
end

% 显示原始图像和解密后的图像
figure;
subplot(1,3,1); imshow(im); title('Original Image');
subplot(1,3,2); imshow(im_shuffle); title('Shuffled Image');
subplot(1,3,3); imshow(im_decrypt); title('Decrypted Image');