基于Delaunay网格和DLP的三维指纹识别系统设计

Design for Three Dimension Fingerprint Recognition System Based on Delaunay Grid and DLP

摘要:

针对目前已有的嵌入式指纹识别系统存在的识别精度底和识别效率低的问题,设计了一种基于单DLP处理器的嵌入式三维指纹识别系统;首先,以TMS320VC5402为处理器核心,FPS200为图像采集芯片,EPM7128为外围逻辑设计了指纹识别系统硬件;然后,设计了基于Delaunay网格的上位机指纹识别软件,将指纹识别过程分为细节点DT网格构造、识别参考点获取、待识别指纹姿势校正和指纹匹配四个阶段进行实现;最后,采用指纹数据库FVC2004为测试数据库在上位机上进行仿真,测试结果表明:文中系统能较为精确地实现指纹识别,平均正确识别率高达98.1%,且与其他方法相比,具有FNMR和FMR值较低、正确识别率高和匹配时间少的优点。

Abstract:

Aiming at the given embed fingerprint recognition system has the defects of low recognition rate and long recognition time, a embed three dimension fingerprint recognition system based on single DSP cup was designed. Firstly, the hardware of the embed fingerprint recognition system was designed, choosing TMS320VC5402 as the CPU, FPS200 as figure capture chip, EPM7128 as the periphery logic. Then the main software constructed in the upper computer, and the recognition for fingerprint was divided to four procedures such as DT grid structure, the obtainment for reference point, posture adjustment and fingerprint match. Finally, the FVC2004 was simulated in the upper computer used as the testing database, the testing result shows the system in this paper can accurately realize fingerprint recognition,the average correct recognition rate was 98.1% and compared with the other methods, it has the low FNMR and FMR, high CR and less matching time. 