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Proceedings Paper

Analysis of the wavelet-matched filtering in a four-wave mixing arrangement
Author(s): A. Salazar; R. Goez; D. Sierra; Johnson Garzon Reyes; F. R. Perez; H. Lorduy
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Paper Abstract

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.

Paper Details

Date Published: 21 October 2004
PDF: 6 pages
Proc. SPIE 5622, 5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications, (21 October 2004); doi: 10.1117/12.590646
Show Author Affiliations
A. Salazar, Univ. Pontificia Bolivariana (Colombia)
R. Goez, Univ. Pontificia Bolivariana (Colombia)
D. Sierra, Univ. Pontificia Bolivariana (Colombia)
Johnson Garzon Reyes, Univ. Pontificia Bolivariana (Colombia)
F. R. Perez, Univ. Pontificia Bolivariana (Colombia)
H. Lorduy, Univ. Pontificia Bolivariana (Colombia)


Published in SPIE Proceedings Vol. 5622:
5th Iberoamerican Meeting on Optics and 8th Latin American Meeting on Optics, Lasers, and Their Applications
Aristides Marcano O.; Jose Luis Paz, Editor(s)

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