Wang Yonghui, Zhao Qinyu, Xu Wenjun, Li Fei, Yan Jun, Liu Shuaiqi, Su Yonggang
Appl Opt. 2023 Oct 10;62(29):7577-7587. doi: 10.1364/AO.503129.
This paper proposes a novel, to the best of our knowledge, double-image hiding scheme based on the chaotic fingerprint phase masks (CFPMs) and three-step phase-shifting digital holography (PSDH). First, the two images to be hidden are encoded into a complex amplitude image, and then with the help of the CFPM located in the Fresnel transform (FrT) domain and the three-step PSDH, the complex amplitude image can be encoded into three noise-like interference holograms. Finally, the three noise-like interference holograms are hidden into the texture part of the host image by the discrete wavelet transform based fusion approach and variational image decomposition technique. This scheme can simultaneously hide two images into one host image, and the invisibility and robustness of the hiding scheme can be well balanced by embedding the secret image in the texture of the host image. Additionally, the introduction of a biometric feature increases the association of the key and the authorized user, and the parameters of the chaotic map and FrT can also provide additional security to the proposed scheme. We have verified the scheme's feasibility, security, and robustness through extensive experiments.
据我们所知，本文提出了一种基于混沌指纹相位掩模（CFPM）和三步相移数字全息术（PSDH）的新型双图像隐藏方案。首先，将两幅待隐藏的图像编码为一幅复振幅图像，然后借助位于菲涅耳变换（FrT）域的CFPM和三步PSDH，将复振幅图像编码为三幅类似噪声的干涉全息图。最后，通过基于离散小波变换的融合方法和变分图像分解技术，将这三幅类似噪声的干涉全息图隐藏到宿主图像的纹理部分。该方案可以同时将两幅图像隐藏到一幅宿主图像中，并且通过将秘密图像嵌入宿主图像的纹理中，可以很好地平衡隐藏方案的不可见性和鲁棒性。此外，生物特征的引入增加了密钥与授权用户之间的关联性，混沌映射和FrT的参数也可以为所提方案提供额外的安全性。我们通过大量实验验证了该方案的可行性、安全性和鲁棒性。
