双路输入实时指纹识别系统

设计了一种主要由液晶光阀，液晶显示器等构成的新型实时指纹识别系统。直角棱镜作为指纹的实时读取装置，参考指纹图像和待识别指纹图像分别从两条光路中输入进行联合变换，降低了对液晶光阈分辨率的要求；在联合变换频谱面上进行高通滤波，将指纹图像预处理与相关运算合为一个过程同时进行，不仅减少了中间过程，还增强了互相关信号的强度，使识别又快又准确。实验结果表明，该系统结构紧凑，实时性强和识别效果高，便于小型化和实用化。

A Double Input Real-time Fingerprint Verification System

A novel system for fingerprint verification is proposed and constructed with a liquid crystal light valve and a liquid crystal display in this paper.In this system,a right-angle prism is used to input fingerprint,the reference fingerprint and the fingerprint to be recognized are transformed lying two light beam,which debase the demand for resolution of liquid crystal light valve.With a high pass filter in the spectrum plane,the system performs fingerprint preprocessing and correlation in a single step,which not only cut down a middle process,but also enhance the cross-correlation signal,so the identify is rapidly and accurately.The experimental results show that the system is compact,high real-time,high discrimination and to be miniaturized and utilized.