Optical implementation of a photorefractive joint transform correlator with wavelet filters

Hui Zhang, Colin M. Cartwright, Mei-Song Ding, W. Allan Gillespie

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    We have investigated a real-time photorefractive joint transform correlator (JTC) with a bank of wavelet filters. In the experimental set-up, a photorefractive crystal BSO has been used as the dynamic holographic medium and a bank of discrete wavelet functions, derived from a mother Mexican-hat wavelet have been selected to achieve band-pass operations in the JTC Fourier domain. With the proper dilation factors, shaper correlation peaks, higher discrimination ability and higher noise robustness have been obtained. Experimental results and analysis are presented.
    Original languageEnglish
    Pages (from-to)223-230
    Number of pages8
    JournalOptics Communications
    Volume181
    Issue number4-6
    DOIs
    Publication statusPublished - 15 Jul 2000

    Keywords

    • Wavelet filter
    • Transform
    • Joint power spectrum

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