Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576.
Opt Lett. 2010 Nov 15;35(22):3817-9. doi: 10.1364/OL.35.003817.
In this Letter, we propose a method for optical image encryption based on diffractive imaging. An optical multiple random phase mask encoding system is applied, and one of the phase-only masks is selected and laterally translated along a preset direction during the encryption process. For image decryption, a phase retrieval algorithm is proposed to extract a high-quality plaintext. The feasibility and effectiveness of the proposed method are demonstrated by numerical results. The proposed method can provide a new strategy instead of conventional interference methods, and it may open up a new research perspective for optical image encryption.
在这封信件中，我们提出了一种基于衍射成像的光学图像加密方法。我们应用了光学多随机相位掩模编码系统，并在加密过程中选择其中一个纯相位掩模，并沿预设方向进行横向平移。对于图像解密，我们提出了一种相位恢复算法来提取高质量的明文。数值结果验证了所提出方法的可行性和有效性。所提出的方法可以为光学图像加密提供一种新的策略，而不是传统的干涉方法，这可能为光学图像加密开辟新的研究视角。
