Analysis of the wavelet-matched filtering in a four-wave mixing arrangement

A. Salazar, R. Góez, D. Sierra, J. Garzón, F. Pérez, H. Lorduy

    Producción científica: Contribución a una revistaArtículo de la conferenciarevisión exhaustiva


    In image processing, the wavelet transform is useful to enhance the local features of images, so that, the correlation of a target with a reference signal can be improved by wavelet filtering. The wavelet filtering operation and correlation can be photorefractively performed if a crystal is used as a dynamic holographic recording medium. In particular, the sillenite family of photorefractive crystals have a high photosensitivity and high carrier mobility which allow a fast response that makes them attractive for real-time image processing and optical phase conjugation. We analyze a real-time wavelet-matched optical correlator using phase conjugation in a four-wave mixing arrangement. The robustness of the correlator to the noise due the finite crystal depth is improved using a proper wavelet filter.

    Idioma originalInglés
    Número de artículo90
    Páginas (desde-hasta)475-480
    Número de páginas6
    PublicaciónProceedings of SPIE - The International Society for Optical Engineering
    N.ºPART 1
    EstadoPublicada - 2004
    EventoRIAO/OPTILAS 2004: 5th Iberoamerican Meeting on Optics, and 8th Latin American Meeting on Optics, Lasers, and their Applications; ICO Regional Meeting - Porlamar, República Bolivariana de Venezuela
    Duración: 3 oct. 20048 oct. 2004


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