Simplified optical image encryption approach using single diffraction pattern in diffractive-imaging-based scheme.
Simplified optical image encryption approach using single diffraction pattern in diffractive-imaging-based scheme.
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DOI：
10.1364/oe.22.021790
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发表时间：
2014-09
期刊：
影响因子：
3.8
通讯作者：
Yi Qin;Q. Gong;Zhipeng Wang
中科院分区：
文献类型：
--
作者：
Yi Qin;Q. Gong;Zhipeng Wang
在以前的基于衍射成像的光学加密方案中，不可能从单个衍射图案中完全恢复明文。在本文中，我们提出了一种新的方法来实现这一目标。加密过程只需进行一次曝光即可完成，并将单个衍射图案记录为密文。为了恢复明文，一种新的中值滤波为基础的相位恢复算法，包括两个迭代周期，已被开发。该方案不仅极大地简化了加密和解密过程，而且方便了密文的存储和传输，并通过数值仿真验证了其有效性和可行性。
In previous diffractive-imaging-based optical encryption schemes, it is impossible to totally retrieve the plaintext from a single diffraction pattern. In this paper, we proposed a new method to achieve this goal. The encryption procedure can be completed by proceeding only one exposure, and the single diffraction pattern is recorded as ciphertext. For recovering the plaintext, a novel median-filtering-based phase retrieval algorithm, including two iterative cycles, has been developed. This proposal not only extremely simplifies the encryption and decryption processes, but also facilitates the storage and transmission of the ciphertext, and its effectiveness and feasibility have been demonstrated by numerical simulations.