16 September 2002 Improved real-time fingerprint verification by four-channel JTC
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In this paper the four-channel real-time joint transform correlator (JTC) for fingerprint verification is proposed which is consists of right-angle prism, 4f system, liquid crystal light valve, hololens array and CCD. Fingerprint image is inputted real-timely using a right-angle prism and processed by 4f system optically to insure the higher contrast. To avoid refusal phenomenon owing to fingerprint images distortion, the single channel correlation identification is changed to four-channel correlation recognition using hololens array. A little different reference fingerprint images from an identical finger are placed in different channels. When a object fingerprint image is inputted, four kinds of correlation results are presented. Not only the recognition accuracy is increased but the processing speed and capability of the system is enhanced. The experimental results are given in this paper.
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Hongxia Wang, Hongxia Wang, Junfa He, Junfa He, Xuanke Zhao, Xuanke Zhao, Youzhang Zhu, Youzhang Zhu, Jun Li, Jun Li, Xiaobing Liu, Xiaobing Liu, } "Improved real-time fingerprint verification by four-channel JTC", Proc. SPIE 4929, Optical Information Processing Technology, (16 September 2002); doi: 10.1117/12.483264; https://doi.org/10.1117/12.483264

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