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Optical image encryption with Hartley transforms
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AI
DOI：10.1364/OL.31.003438.png)
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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. (c) 2006 Optical Society of America.
Keyword:
FRACTIONAL FOURIER-TRANSFORM
DIGITAL HOLOGRAPHY
SECURING INFORMATION
VIRTUAL OPTICS
DOMAIN
WAVELENGTH
CORRELATOR
LIGHT
期刊
IF:
3.3
论文数:
4.0W
被引数:
7.6W
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