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Complex holographic schemes are usually required to obtain complex-valued encrypted images that are used for verification in previously proposed authentication approaches based on photon-counting imaging and double-random-phase encoding (DRPE). In this paper, we propose an optical information encryption and authentication system by integrating the classical optical DRPE with a modified iterative phase...
Focusing light through a boundary between two media is a topic of interest in studying and developing different microscopies. In this paper, we use plane wave (PW) expansions and multipole expansions of an electromagnetic field for deriving the transmitted and reflected field for a focused field incident onto different interfaces. We present an approximate model and a rigorous model for calculating...
With the rapid development of modern technologies, information security has attracted more and more current attention. In this paper, we present optical image encryption based on 3-D sphere and phase retrieval in gyrator transform domain. The plaintext is divided into a series of small quadratic blocks, and each block is treated as a particle. The series of particles is distributed in 3-D spheres,...
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