图像对比度增强的光学指纹实时识别系统

Realtime fingerprint verification system with pattern contrast enhancement

提出采用光学高通滤波器和直角三棱镜组成实时指纹输入装置，对Ｆ．Ｔ．Ｇａｍｂｌｅ等人提出的实时指纹输入装置作出了重大改进，大大增强了实时指纹输入图像的对比度。实验结果表明，采用该装置组成的实时指纹识别系统，具有识别速度快、精度高和装置比较简单等优点，有较高的实用价值。

In this paper,we present a new realtime input arrangement which combines the 90° prism and the high pass filter.The contrast of the fingerprint pattern introduced by the presented input arrangement is far higher than that introduced by the prism.The realtime fingerprint verification system with proposed input arrangement is demonstrated,and the experimental results show that it has a lower falsematch rate and it is simple,practical and inexpensive.