基于ADSP-BF531的电网作业终端指纹采集识别系统

摘要

Fingerprint identification system for power grid operation terminal has many defects,such as a little bit of high FRR and FAR,slow running speed when executing complex algorithm and high hardware cost.In order to overcome the insufficiency,this paper put forward the fingerprint identification system with high performance-price ratio based on ADSP-BF531.Hardware design and fingerprint identification algorithm was carefully described.Hybrid filter used for fingerprint enhancement combing Gabor and FFT× [FFT|n filter was especially studied.Experiment results show that this fingerprint identification system has high recognition accuracy and the real-time performance can meet the requirement.%为克服现有电网作业终端指纹识别系统拒识率(FRR)、误识率(FAR)偏高,在嵌入式处理器上运行复杂算法速度慢、成本高的缺点,提出了以ADSP-BF531为核心的具有较高性价比的指纹采集识别系统.对硬件设计原理进行了描述;然后对指纹识别软件算法进行了详细阐述.特别地,对基于Gabor和FFT×|FFT|n相结合的混合滤波器实现指纹图像增强的方法进行了详细描述.实验测试结果表明,该指纹识别系统识别准确率高,实时性满足实际需求.