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

被引：8

作者：

Yan, YB ^{[1
]}

Huang, GG ^{[1
]}

Feng, WY ^{[1
]}

Jin, GF ^{[1
]}

Wu, MX ^{[1
]}

机构：

[1] Tsing Hua Univ, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China

来源：

WAVELET APPLICATIONS IN SIGNAL AND IMAGE PROCESSING VI | 1998年 / 3458卷

关键词：

wavelet transform; multichannel correlators; photorefractive material; fingerprint identification;

D O I：

10.1117/12.328143

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：259 / 266

页数：8