中文摘要：

目前商用指纹识别系统由于仅依赖于手指表面二维图像的脊模式和细节特征进行识别，对人造指纹有极大的安全漏洞。本文提出一种利用光学相干层析（OCT）技术识别人造指纹的方法。在分析OCT系统原理及皮肤光学特性的基础上，使用研制的全光纤OCT系统分别对人体手指以及被商用指纹识别系统识别通过的人造指模进行成像，获得了二者的二维OCT图像和对应的一维信号，同时获得人造指模的三维OCT图像，通过对比分析二者深度方向上的微结构信息以及光学特性可以准确地识别出人造指模。实验结果表明，0CT技术不仅可以用于指纹的防伪，有效地提高生物特征识别系统的安全性能，而且还具有用于指纹识别的潜力。

英文摘要：

As current commercial fingerprint recognition systems are only based on the analysis of ridge patterns and minutiae obtained from 2-D image of a finger surface, artificial fingerprints can easily spoof the systems and make they have a big security risk. In this paper,a method is proposed for identifying artificial fingerprints by using optical coherence tomography （OCT）. Based on the analysis of OCT system theory and optical properties of the skin,the all-fiber OCT system is used to scan the human finger and the artificial fingerprint dummy which can spoof the fingerprint recognition system. 2-D tomography images of the two and 1 D average OCT signals corresponding to the 2-D images are obtained,respectively. 3-D OCT image of the artificial fingerprint dummy is given by OCT scanning. It reveals that artificial fingerprint dummy can be accurately identified on the basis of the obtained structural information in the depth direction and optical properties through the comparative analysis of 2-D images and 1-D OCT signals of the two. The experimental results indicate that OCT technology not only can be used for identification of artificial fingerprints to effectively enhance the safety performance of the biometric recognition system,but also has the potential for fingerprint identification