Optical image encryption with Hartley transforms.

@article{Chen2006OpticalIE,
  title={Optical image encryption with Hartley transforms.},
  author={Linfei Chen and Daomu Zhao},
  journal={Optics letters},
  year={2006},
  volume={31 23},
  pages={3438-40}
}
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… CONTINUE READING
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