Phase retrieval algorithms based on 4-f system for optical image encryption are compared in respect of the image retrieval quality and the convergence. Simulation results show that enlarging the searching space can decrypt the image with extremely high quality, while employing the searching strategy of modifying both the phase-distributions in the input and the frequency planes can result in much faster convergence for the algorithm.
Phase-retrieval algorithms applied in a 4-f system for optical image encryption: a comparison
Information Optics and Photonics Technology ; 2004 ; Beijing,China
Proc. SPIE ; 5642
2005-01-11
Conference paper
Electronic Resource
English
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