Multichannel wavelet correlators for fingerprint identification by the use of associative storage in a photorefractive material

Yingbai Yan; Gaogui Huang; Wenyi Feng; Guofan Jin; Minxian Wu

doi:10.1117/12.328143

19 October 1998 Multichannel wavelet correlators for fingerprint identification by the use of associative storage in a photorefractive material

Yingbai Yan, Gaogui Huang, Wenyi Feng, Guofan Jin, Minxian Wu

Author Affiliations +

Proceedings Volume 3458, Wavelet Applications in Signal and Imaging Processing VI; (1998) https://doi.org/10.1117/12.328143
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

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 F_e: 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.

Citation Download Citation

Yingbai Yan, Gaogui Huang, Wenyi Feng, Guofan Jin, and Minxian Wu "Multichannel wavelet correlators for fingerprint identification by the use of associative storage in a photorefractive material", Proc. SPIE 3458, Wavelet Applications in Signal and Imaging Processing VI, (19 October 1998); https://doi.org/10.1117/12.328143

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