Optical multiple information hiding via azimuth multiplexing
Optics and Lasers in Engineering(2021)
Abstract
•Azimuth is first introduced into optical information security.•The introduction of azimuth enhances the spatial utilization during diffraction and modulation.•The security of the system is boosted in many aspects because of the combination of free-space optics and visual cryptography.•The system is robust to common perturbations, such as noise and blocking.
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Key words
Optical information hiding,Azimuth multiplexing,Phase retrieval,Visual cryptography
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