Abstract
A technique, based on a modified Gerchberg-Saxton algorithm (MGSA) and a phase modulation scheme in the fractional Fourier-transform (FrFT) domain, is proposed to reduce crosstalks in multiple-image encryption and multiplexing. First, each plain image is encoded into a phase function by using the MGSA. Then all the created phase functions are multiplexed, with different fractional order of FrFT, and phase-modulated before being combined together into a single phase only function (POF). Simulation results show that the crosstalks between multiplexed images have been significantly reduced, compared with prior methods [1, 2], thus presenting high promise in increasing the multiplexing capacity and encrypting graylevel and color images.
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