This paper proposes a multiphase retrieval algorithm and then presents a secret image sharing scheme. The proposed algorithm can divide a secret image into multiple phase-only encodings (shadows) and then overcome the shadow expansion problem. When the shadows are arranged in a certain order, the light intensity detector can directly acquire the secret image using parallel light, and the recovery process is simple and easy to operate. Furthermore, Fresnel transform parameters are used for authentication, which can avoid deceit. The differences in the initial random phase encodings make the same secret image produce different shadows, which can effectively resist statistical analysis attacks. Finally, theoretical analysis and a simulation are used to verify the validity and feasibility of the proposed scheme.

中文翻译：

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基于多阶段检索算法的秘密图像共享

本文提出了一种多阶段检索算法，然后提出了一种秘密图像共享方案。所提出的算法可以将秘密图像分成多个仅相位编码（阴影），然后克服阴影扩展问题。当阴影按一定顺序排列时，光强检测器可以利用平行光直接获取秘密图像，恢复过程简单易操作。此外，使用菲涅耳变换参数进行认证，可以避免欺骗。初始随机相位编码的差异使得相同的秘密图像产生不同的阴影，可以有效抵抗统计分析攻击。最后，通过理论分析和仿真验证了所提出方案的有效性和可行性。