Abstract
We present a novel image-encryption algorithm that employs multichannel
and multistage fractional Fourier-domain filtering architecture. We perform
the encryption and decryption by randomly filtering the spatial frequency
of the image and then recombining the information from the algorithm in a
multistage fractional Fourier domain with pure random-intensity-encoded masks
and their complements in a multichannel scheme. The algorithm can be implemented
iteratively in an electro-optical setup. Numerical simulations have verified
the validity of the algorithm.
© 2001 Optical Society of America
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