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    Fractional Fourier transform-based image encryption: phase retrieval algorithm

    Hennelly, Bryan M. and Sheridan, J. T. (2003) Fractional Fourier transform-based image encryption: phase retrieval algorithm. Optics Communications, 226. pp. 61-80. ISSN 0030-4018

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    A number of methods have been proposed in the literature for the encryption of two-dimensional image information using optical systems based on the fractional Fourier transform (FRT). We present an image encryption technique, which is based on a recently proposed method of phase retrieval using the FRT. The optical implementation of the method is mentioned and digital simulations are presented. The technique is shown to be a powerful method of digital data and image encryption. In this paper, we outline the implementation of the algorithm and examine the sensitivities of the various encryption keys. We also compare the performance of the new technique to digital implementations of other FRT-based optical encryption schemes.

    Item Type: Article
    Additional Information: The definitive version of this article is available at doi:10.1016/j.optcom.2003.08.030 . © Elsevier B.V.
    Keywords: Fourier optics and optical signal processing: Fourier transforms; Fourier optics and optical signal processing: signal processing; Optical computing: information processing; Digital image processing; Phase retrieval;
    Academic Unit: Faculty of Science and Engineering > Computer Science
    Faculty of Science and Engineering > Electronic Engineering
    Item ID: 5808
    Identification Number:
    Depositing User: Dr. Bryan Hennelly
    Date Deposited: 10 Feb 2015 15:42
    Journal or Publication Title: Optics Communications
    Publisher: Elsevier
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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