基于点扩散和误差扩散的半色调自隐藏算法

将秘密图像隐藏在一幅基于点扩散或误差扩散的半色调图像中，实现基于点扩散和误差扩散的半色调自隐藏算法；以基于点扩散的双向共轭信息隐藏算法为基础实现基于点扩散的灰度半色调自隐藏算法，将该算法扩展到基于误差扩散的灰度半色调图像，提出基于误差扩散的灰度半色调自隐藏算法；以最新的基于点扩散和误差扩散的新共轭数据隐藏算法为基础，提出基于点扩散和误差扩散的彩色半色调自隐藏算法。将四类自隐藏算法进行实验验证，对不同半色调自隐藏算法的性能进行了比较。结果表明在相同参数下，基于误差扩散的彩色半色调自隐藏算法具有最好的性能。

Halftone self-hiding algorithms in dot diffused and error diffused halftone images

This paper proposed halftone self-hiding algorithms, and a secret image can be hidden in dot diffused or error diffused halftone images. Based on the data hiding algorithm by dual conjugate dot diffusion, it realized a dot diffused gray-scale halftone self-hiding algorithm, and extended this algorithm to an error diffused halftone image, and then proposed an error diffused gray-scale halftone self-hiding algorithm. Based on the data hiding algorithm by new color conjugate error diffusion and the data hiding algorithm by new color conjugate dot diffusion which were the latest color halftone visual cryptography, it proposed color halftone self-hiding algorithms in dot diffused and error diffused halftone images. It implemented experiments of four algorithms and compared the performance of different algorithms. The results show that the color halftone self-hiding algorithm based on dot diffused and error diffusion has the best performance under the same parameters.