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    Reduction of speckle in digital holography by discrete Fourier filtering


    Maycock, Jonathan and Hennelly, Bryan M. and McDonald, John and Frauel, Yann and Castro, Albertina and Javidi, Bahram and Naughton, Thomas J. (2007) Reduction of speckle in digital holography by discrete Fourier filtering. Journal of the Optical Society of America, 24 (6). pp. 1617-1622. ISSN 1084-7529

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    Abstract

    We present a digital signal processing technique that reduces the speckle content in reconstructed digital holograms. The method is based on sequential sampling of the discrete Fourier transform of the reconstructed image field. Speckle reduction is achieved at the expense of a reduced intensity and resolution, but this tradeoff is shown to be greatly superior to that imposed by the traditional mean and median filtering techniques. In particular, we show that the speckle can be reduced by half with no loss of resolution (according to standard definitions of both metrics).

    Item Type: Article
    Additional Information: Postprint version of article. The definitive version of this article is available at http://dx.doi.org/10.1364/JOSAA.24.001617 © 2007 Optical Society of America. This publication has emanated from research conducted with the financial support of Science Foundation Ireland, Irish Research Council for Science, Engineering and Technology, and Enterprise Ireland
    Keywords: Reduction of speckle; digital holography; discrete Fourier filtering; digital signal processing technique;
    Academic Unit: Faculty of Science and Engineering > Computer Science
    Faculty of Science and Engineering > Electronic Engineering
    Item ID: 5790
    Depositing User: Dr. Bryan Hennelly
    Date Deposited: 09 Feb 2015 16:57
    Journal or Publication Title: Journal of the Optical Society of America
    Publisher: Optical Society of America
    Refereed: Yes
    Funders: Science Foundation Ireland (SFI), Irish Research Council for Science Engineering and Technology (IRCSET), Enterprise Ireland (EI)
    URI:

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