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Proceedings Paper

Multichannel wavelet correlators for fingerprint identification by the use of associative storage in a photorefractive material
Author(s): Yingbai Yan; Gaogui Huang; Wenyi Feng; Guofan Jin; Minxian Wu
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Paper Abstract

The application of wavelet transform can improve discrimination capability and signal-to-noise ratio of the correlation outputs with respect to the classical one. The concept of the associative storage in a photorefractive material offers suitable methods to design multichannel correlators for fingerprint identification. An optical system that employs holographic recording in a Fe: LiNbO3 crystal is proposed and experimentally demonstrated for the physical implementation of multichannel wavelet matched correlator. The scale of wavelet filter is optimized according to the robustness to the noise and discriminability of the filter. The photorefractive correlator is used as a ROM in the recognition. When the object beam with an input fingerprint is used for recovering, a set of correlation outputs are obtained in parallel along the directions of the reference beams, and detected by a CCD camera. Experimental results are promising for further use in the practice.

Paper Details

Date Published: 19 October 1998
PDF: 8 pages
Proc. SPIE 3458, Wavelet Applications in Signal and Imaging Processing VI, (19 October 1998); doi: 10.1117/12.328143
Show Author Affiliations
Yingbai Yan, Tsinghua Univ. (China)
Gaogui Huang, Tsinghua Univ. (China)
Wenyi Feng, Tsinghua Univ. (United States)
Guofan Jin, Tsinghua Univ. (China)
Minxian Wu, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 3458:
Wavelet Applications in Signal and Imaging Processing VI
Andrew F. Laine; Michael A. Unser; Akram Aldroubi, Editor(s)

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