【作者】 沈杰；

【导师】 陈朋；

【作者基本信息】 浙江工业大学 ， 控制工程（专业学位）， 2017， 硕士

【摘要】 随着信息技术的发展,个人身份认证在国家安全和消费领域得到了广泛地应用,目前基于手指的生物特征识别占据58%市场,但是传统手指生物特征面临模态单一、防伪能力弱两大瓶颈。手指的真皮指纹、汗孔、汗腺等生物特征具有很强的唯一性和防伪能力,但以上模态信息使用传统采集方法比较困难,相应的装置缺乏,并且采集的图像质量欠佳。本文在分析了光学相干层析成像技术(Optical Coherence Tomography,OCT)和手指生物特征采集基础研究之后,针对传统手指生物特征采集模态单一的缺点,提出并设计了基于OCT的手指生物特征采集装置,本文主要的工作和成果归纳如下:(1)基于OCT的线阵CCD(Charge Coupled Device,电荷耦合元件)相机硬件电路设计:通过对硬件系统的需求分析,面对生物信息采集应用下高分辨率、高速的特性,自主设计了高速、高分辨率线阵CCD相机硬件原型,包含核心处理模块与CCD控制模块。(2)基于手指组织成像的频域OCT光学系统设计:通过对传统干涉方法分析,设计了基于光纤迈克尔逊干涉仪的OCT整体光学架构,包括宽带光源、成像干涉仪、样品扫描系统、光谱仪等模块,各个模块之间通过光纤传输光信号。为使系统成像效果最佳,从理论分析各个模块的光学评价参数,并结合实际进行了验证。最终利用此套光学系统完成OCT干涉光谱输出。(3)采集装置系统调试与采集实验:根据前面自主设计的线阵CCD相机和频域OCT光学系统,搭建采集平台进行调试与实验。首先完成了 CCD相机驱动调试与同步采集调试,最后对手指进行图像采集实验。更多还原

【Abstract】 With the development of information technology,personal identification has been widely used in the field of national security and consumption.,biometrics based on fingers occupy 58%of the market at present,but the traditional finger biological features are faced with two bottlenecks:single mode and weak anti-counterfeiting ability.The dermal fingerprints,sweat pores,sweat glands and other biological characteristic is unique and strong security.However,it is difficult to use the traditional acquisition method for the above modal information,the corresponding device is lack,and the image quality is poor.After analyzing the basic research of optical coherence tomography(OCT)and finger biometrics acquisition,this thesis proposed and designed the finger biometrics acquisition device based on OCT which is aimed at the shortcomings of the single-mode of traditional finger biometrics acquisition.The main work and achievements of the thesis are summarized as follows:(1)The hardware design of linear CCD(Charge Coupled Device)camera circuit based on OCT:After analyzing the requirement of hardware system,the characteristics of high resolution and high speed in biometric acquisition application,independently design high-speed and high-resolution linear CCD camera hardware prototypes,wich includes the core processing module and CCD control module.(2)Design of frequency domain OCT optical system based on finger tissue imaging:after analysis of traditional interferometry methods,the overall optical structure of OCT based on fiber Michelson interferometer is designed,which includes broadband light source,imaging interferometer,sample scanning system and spectrometer,etc,each module transmits optical signal through optical fiber.In order to optimize the imaging performance of the system,the optical evaluation parameters of each module are theoretically analyzed,and the actual verification is carried out.Finally,the OCT Interference spectrum output is completed by using this optical system.(3)Acquisition device system debugging and experiment:According to the previously self-designed linear CCD camera and frequency domain OCT optical system,build a acquisition platform for debugging and experiment.Firstly,the debugging of CCD camera driver and synchronous acquisition are completed.Finally,the image acquisition experiment of the finger.更多还原