Abstract
In this paper, we propose a novel method for image encryption by employing the diffraction imaging technique. This method is in principle suitable for most diffractive-imaging-based optical encryption schemes, and a typical diffractive imaging architecture using three random phase masks in the Fresnel domain is taken for an example to illustrate it. The encryption process is rather simple because only a single diffraction intensity pattern is needed to be recorded, and the decryption procedure is also correspondingly simplified. To achieve this goal, redundant data are digitally appended to the primary image before a standard encrypting procedure. The redundant data serve as a partial input plane support constraint in a phase retrieval algorithm, which is employed for completely retrieving the plaintext. Simulation results are presented to verify the validity of the proposed approach.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Yi Qin, Qiong Gong, and Zhipeng Wang
Opt. Express 22(18) 21790-21799 (2014)
Yanfeng Su, Kang Xu, Wenzhe Rong, Zhihan Wang, Ruijie Xue, Lijuan Xue, Zhijian Cai, and Wenqiang Wan
Appl. Opt. 62(23) 6131-6139 (2023)
Juan M. Vilardy, María S. Millán, and Elisabet Pérez-Cabré
Appl. Opt. 53(8) 1674-1682 (2014)