Open AccessOptical color image encryption by wavelength multiplexing and lensless Fresnel transform holograms
Author(s) -
Linfei Chen,
Daomu Zhao
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.008552
Subject(s) - holography , encryption , optics , computer science , multiplexing , channel (broadcasting) , fresnel diffraction , computer generated holography , computer vision , artificial intelligence , physics , telecommunications , diffraction , operating system
We propose what we believe is a new method for color image encryption by use of wavelength multiplexing based on lensless Fresnel transform holograms. An image is separated into three channels: red, green, and blue, and each channel is independently encrypted. The system parameters of Fresnel transforms and random phase masks in each channel are keys in image encryption and decryption. An optical color image coding configuration with multichannel implementation and an optoelectronic color image encryption architecture with single-channel implementation are presented. The keys can be added by iteratively employing the Fresnel transforms. Computer simulations are given to prove the possibility of the proposed idea.