A novel method using 3-D space is proposed for optical multiple-image encryption. Each input image is divided into a series of particle-like points distributed in 3-D space, and all generated particle-like points are simultaneously encrypted into a phase-only mask. The proposed method may open up a novel research perspective for optical multiple-image encryption, since a 3-D-space processing strategy is developed and successfully applied.
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Wen Chen (2016) studied this question.
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