摘要
研究了基于TMS320DM642 DSP芯片的非接触多光谱手识别装置中的光源。在整个识别装置中,光源占有举足轻重的地位,合理准确的光源能够采集到清晰的手部信息图像,并有利于提高用户身份识别的准确率。基于此目的搭建了以恒流源控制芯片、LED为主要器件的多光谱光源控制系统:恒流源芯片要驱动采集手掌掌纹信息的470 nm的可见蓝光LED和采集手掌静脉、掌形信息的850 nm近红外光LED;且可实现一次拍摄并获取高质量的三模态信息(掌纹、手掌静脉及掌形)的图像;并利用Light Tools软件对该光源进行了辅助验证。该设计不但解决了在获取手部三模态信息时需要转换光源的问题,而且还为多模态手部识别奠定了数据基础和实验环境。
The light source of non- contact multi- spectral hand recognition device based on TMS320DM642 DSP is studied.In the identification device,light source plays an important role.Reasonable accurate light source can collect hand information of image,and can improve the accuracy of user identification.Based on this,multi- spectral light control system is built,which mainly includes constant current source control chip and the LED.Constant current source chip collected 470 nm visible blue LED of palm print information and collected 850 nm near- infrared LED of palm vein,hand geometry information,and it can realize the three modal information with one snapshot and obtain high quality（palm print,palm vein and palm- shape） images.And the light source is verified using the light tools software.This design solves the problem of needing to convert the light source in acquiring three modal information.It lays the foundation for multi- modal hand recognition.
出处
《激光与红外》
CAS
CSCD
北大核心
2014年第7期783-787,共5页
Laser & Infrared
基金
国家自然科学基金(No.60972123)
教育部高等学校博士学科点专项科研基金(No.20092102110002)
辽宁省教育厅科研项目(No.2009A561)
沈阳市科技计划项目(No.F12-277-1-10)
沈阳市科技计划项目(No.F10-213-1-00)资助
