约瑟夫置乱算法加密彩色图像matlab代码

对于约瑟夫置乱算法加密彩色图像的 MATLAB 代码，请参考以下示例：

% 约瑟夫置乱算法加密彩色图像
function encryptedImage = josephusShuffleEncryption(image)
    % 将图像矩阵转换为向量
    imageVector = image(:);

    % 置乱图像向量
    n = length(imageVector);
    k = 3; % 置乱步长
    startIndex = 1;
    shuffledVector = zeros(size(imageVector));
    for i = 1:n
        shuffledIndex = mod(startIndex + k - 2, n) + 1;
        shuffledVector(shuffledIndex) = imageVector(i);
        startIndex = shuffledIndex;
    end

    % 将置乱后的向量重新转换为图像矩阵
    encryptedImage = reshape(shuffledVector, size(image));
end

% 示例用法:
originalImage = imread('color_image.jpg');
encryptedImage = josephusShuffleEncryption(originalImage);
imshow(originalImage);
figure;
imshow(encryptedImage);