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

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

Resultado de la investigación: Contribución a una revistaArtículo de la conferenciarevisión exhaustiva

Resumen

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
Volumen5622
N.ºPART 1
DOI
EstadoPublicada - 2004
Publicado de forma externa
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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