兰州交通大学毕业设计（论文）摘要随着科学技术的发展，人们的安全意识也越来越强，因为指纹具有唯一性和终生不变性，所以指纹识别成为代替传统身份识别最安全、可靠的方法之一。本设计基于飞思卡尔KinetisK60N512系列单片机，指纹识别模块选择的是杭州城章科技的R305F模块，该模块带有高性能的DSP芯片，该DSP芯片内嵌完整的指纹识别算法和协议，具有指纹采集，指纹比对，指纹搜索和存储等功能。模块与单片机通过串口进行通讯。指纹识别系统通过CH340G芯片实现TTL电平向RS-232电平的转换，进而实现与PC机的交互，PC机端经上位机显示指纹识别的结果。论文中介绍了基本算法的实现流程，同时介绍了K60N512芯片看门狗模块的基本原理以及启动流程等。结果表明，该套指纹识别系统算法性能可靠，指纹识别率高，可以实现预先制定的目标，完成指纹识别的功能。关键词：指纹识别；飞思卡尔单片机；串口-I-兰州交通大学毕业设计（论文）AbstractWiththedevelopmentofscienceandtechnology,people'ssafetyconsciousnessisbecomingmoreandmorestrong,thefingerprinthastheuniquenessandinvarianceforlife,sothefingerprintidentificationisinsteadofthetraditionalidentificationisoneofthemostsafeandreliablemethods.ThisdesignisbasedonFreescaleKinetisK60N512seriesmicrocontroller,fingerprintidentificationmoduleistheproductofGrowupcompany,themodulewithhighperformanceDSPchip,andtheDSPchipwithcompletefingerprintidentificationalgorithmandprotocol,fingerprint’sacquisition,fingerprint’ssearchandstorage,andotherfunctions.Moduleandmicrocontrollercommunicationthroughtheserialport.FingerprintidentificationsystemuseCH340GchipchangeTTLleveltoRS-232level,andthenrealizetheinteractionwithaPC,thePCshowstheresultoffingerprintidentification.Thethesisintroducesthebasicalgorithmimplementationprocess,atthesametime,thisarticleintroducesthebasicprincipleofthewatchdogmoduleinsideK60N512chipandthestartprocess.Resultsshowthatthealgorithmoffingerprintidentificationsystemisreliable,fingerprintrecognitionrateishigh,andcanachievetargetoffingerprintidentification.KeyWords:Fingerprintidentification,FreescaleKinetis,UART目录摘要..........................................................................................................................................IAbstract......................................................................................................................................................II-II-兰州交通大学毕业设计（论文）1绪论......................................................................................................................................................11.1选题背景和研究意义..............................................................................................................11.2国内外研究现状......................................................................................................................12指纹识别的基本原理..........................................................................................................................12.1指纹图像的采集......................................................................................................................12.2指纹图像预处理......................................................................................................................22.3指纹图像特征点的提取...........................................................................................................42.4指纹图像伪细节点的处理...................................................................................
