葛明涛+关景新+董素鸽
摘 要: 采用指纹信息作为身份识别手段的应用已经很广泛,但传统的指纹信息识别身份时存在容易被仿造的缺点。3D指纹信息不但可以进一步提高指纹识别率而且可以很好地克服该缺点。在此主要介绍利用双目视角技术采集3D指纹信息,提出了一种3D指纹信息采集的解决方案。详细介绍了以MTK平台作为控制平台,DSP芯片做算法处理的硬件设计。该设计的硬件成本低且安全性高。在C/S结构的系统设计中,通过测试该硬件方案可以直接在客户端上采集信息,便携性好。
关键词: 双目视角; 嵌入式系统; 3D指纹识别; 3D指纹信息采集
中图分类号: TN911?34 文献标识码: A 文章编号: 1004?373X(2014)18?0155?04
Design of embedded 3?D fingerprint identification system based on binocular vision
GE Ming?tao1, GUAN Jing?xin2, DONG Su?ge1
(1. Sias International University, Zhengzhou 451150, China; 2. School of Zhuhai Polytechnic, Zhuhai 519000, China)
Abstract: To take the fingerprint information as a means of identity recognition is very popular now, but the traditional means has a fault being easy to be copied. 3?D fingerprint information can further improve the recognition rate and overcome this fault. The 3?D fingerprint information acquisition realized by the aid of the binocular vision technology is introduced. A solution scheme to correct 3?D fingerprint information is proposed. The hardware design of using MTK as a control platform and DSP chip for algorithm processing is described. The testing results show that the system can directly correct information on the client?side. The system has low cost, high securety, high accuracy and good portability.
Keyword: binocular vision; embedded system; 3?D fingerprint identification; 3?D fingerprint information acquisition
0 引 言
近代指纹识别系统就指纹的采集方式而言总体可分为接触式和非接触式。接触式的识别方式,如指纹锁,手续简化识别率较高,但由于模仿手指蘸墨压印的方式,得到的指纹图像容易被模仿,反侦查能力差,同时容易受手指的环境条件干扰;非接触式的指纹识别系统[1],可以排除手指环境及压印等外部因素,进一步提高了识别率,却有脊纹不明显而失配率高的缺点。新近提出的基于双目视角的非接触式3D指纹识别系统[2],解决了二维指纹图像脊纹不明显而失配率高的问题,但以计算机为处理中心,系统体积大,便携性差,硬件成本高。
为了完成指纹信息库的建立及信息的网络化要求,一个完善的指纹采集系统按功能把系统划分为客户端和服务器两部分。……