title: Optical image encryption with Hartley transforms.
abstract: We propose a new method for image encryption based on Hartley transforms that is a real transform and can be realized by spatially incoherent or coherent illumination. The proposed optical implementation is based on a Michelson-type interferometer in which the pure random intensity is distributed at the Hartley plane in encryption. Computer simulations prove it is possible. A Hartley hologram method is also given and described to resolve the sign ambiguity problem that would be encountered in image reconstruction.
authors.affiliation: Department of Physics, Zhejiang University, Hangzhou, China.
authors.forename: Linfei
authors.initials: L
authors.lastname: Chen
authors.forename: Daomu
authors.initials: D
authors.lastname: Zhao