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Optical Engineering

Hybrid optical/digital access control using fingerprint identification
Author(s): Zikuan Chen; Ying Sun; YanXin Zhang; Guoguang Mu
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Paper Abstract

Two hybrid optical/digital systems for access control applications in real-time fingerprint identification are presented. Both involve fingerprint acquisition with a prism, optical Fourier transformation by a lens, data reduction using a wedge-ring detector (WRD), and decision making with a digital computer. One, called the coherent system, performs the Fourier transformation on a coherent fingerprint image introduced directly from a prism, and the other, called the incoherent system, acquires an incoherent fingerprint image, performs preprocessing in a digital computer, and incoherent-to-coherent image conversion before coherent processing. Both systems use the total internal reflection obtained in a prism to introduce the fingerprint image. Decision making is performed by a computer on the WRD output, a feature vector of 64 component digital values. In our experiment, discrimination and error-tolerance performance associated with our two access control systems were tested with four different fingerprints. Initial experimental results show that the incoherent system achieves better performance at the expense of additional equipment.

Paper Details

Date Published: 1 March 1995
PDF: 6 pages
Opt. Eng. 34(3) doi: 10.1117/12.183997
Published in: Optical Engineering Volume 34, Issue 3
Show Author Affiliations
Zikuan Chen, Nankai Univ. (China)
Ying Sun, Nankai Univ. (China)
YanXin Zhang, Nankai Univ. (China)
Guoguang Mu, Nankai Univ. (China)


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