高准确度实时指纹识别系统

陈怀新; 陈晓伟; 陈祯培; 洪汝桐

中国激光, 2001, 28 (3): 279, 网络出版: 2006-08-10

高准确度实时指纹识别系统

Real-time Fingerprint Identification System with High Discriminability

论文大纲

陈怀新 ¹陈晓伟 ¹陈祯培 ¹洪汝桐 ²

作者单位

¹ 四川大学光电科学技术系成都 610064

² 西南技术物理研究所成都 610041

摘要

利用二值化联合变换相关技术成功地设计了一个单空间光调制器、单CCD的光电混合实时指纹识别系统。通过对空间光调制器在傅氏谱平面的灰度动态范围进行调节,控制了通过整个系统的光能量,使得系统能够实时运行。利用离散余弦变换算法对联合变换功率谱进行数字处理,增强傅里叶面的互相关项,消除自相关项,提高了系统的识别能力。采用一种新的双参数判别方法对相关信号进行判别,提高了判别的准确度。实际测试结果表明,该识别系统的错误拒绝率为0.47%,错误接受率为0。

Abstract

A real-time fingerprintidentification system using binary joint transform correlator with a single space lightmodulator and a single CCD has been developed successfully. A discrete cosine transformalgorithm was used to process the joint power spectrum in order to enhance thecross-correlator term and eliminate the auto-correlator term in the joint power spectrumand improve the discriminability of the system.The light energy passing through the systemwas controlled by adjusting the gray-value range of the space light modulator at Fourierplane, as a result the system could execute real-time fingerprint identification. A newtwo-parameter decision method was used to decide the correlator signal, and the decidingveracity was improved. Real-time tests yielded a false rejection rate of 0.47% and a falseacceptance rate of zero.

参考文献

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陈怀新, 陈晓伟, 陈祯培, 洪汝桐. 高准确度实时指纹识别系统[J]. 中国激光, 2001, 28(3): 279. 陈怀新, 陈晓伟, 陈祯培, 洪汝桐. Real-time Fingerprint Identification System with High Discriminability[J]. Chinese Journal of Lasers, 2001, 28(3): 279.

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