基于labview的车牌识别停车系统设计

本科毕业（设计）论文题目基于LABVIEW的车牌识别停车系统设计学院机械工程学院专业测控技术与仪器学生姓名学号年级2012指导教师职称2016年4月25日成都学院毕业设计（论文）基于LABVIEW的车牌识别停车系统设计摘要：随着停车场的管理系统对网络化、智能化要求越来越高，传统的基于IC卡技术的停车场管理系统已经不再满足要求了。在此背景下，本文提出一种基于LABVIEW的车牌识别停车系统的设计方案。本系统基于NIVISION视觉开发模块进行车牌识别算法设计，车牌识别算法主要由图像预处理、车牌区域的定位、车牌的识别三大部分组成。对需要识别的图像的具体处理过程分为：读取、大小归一化、车牌倾斜校正、车牌区域初步定位并剪切提取、大小再归一化、剪切去掉提取出的车牌边框、二值化、OCR训练、OCR识别9个步骤。车牌区域的定位是实现车牌识别算法的最关键步骤，本设计主要采用HSL模式下颜色阈值及形态学处理来实现的。车牌识别算法采用的是模板匹配法，是通过LABVIEW的视觉助手的OCR功能实现的。在此进出上进一步设计停车管理系统，主要使用LABSQL，并配合SQL指令来进行开发的。实现了车辆进出门禁的自动识别、登记、计费。其中对零时停车按时计费，对包月车辆不收费。对150个实际采集样本测试，车牌区域定位成功140个，完全识别出125个车牌，测试识别率为83.3%。关键词：LABVIEW车牌识别停车场管理视觉助手LABSQL成都学院毕业设计（论文）LicenseplaterecognitionandParkingmanagementsystembasedongraphicsdesignSpecialty：ThemeasurementandcontroltechnologyandinstrumentStudentNumber：201210114112Student：ZengXingyuSupervisor：ChengYueAbstract:Astheparkinglotmanagementsystemofnetwork,thesoftwaredemandishigherandhigher,thetraditionalparkinglotmanagementsystembasedonthetechnologyofICcardisnolongermeettherequirements.Inthisbackground,thispaperproposesadesignschemeoflicenseplaterecognitionsystembasedonLABVIEWThedesignofparkingmanagementsystemismainlyusedLABSQL,andcooperatewiththedevelopmentofSQLcommands.Thevehicleinandoutofthedoorcanbeautomaticallyidentification,registration,billing.Monthlyvehiclefortemporaryparkingpricing,ontimeincaseofnocharge.ThissystembasedonNIVISIONdevelopmentmoduleforlicenseplaterecognitionalgorithmdesignVISION,licenseplaterecognitionalgorithmismainlycomposedofthepositioningoftheimagepreprocessing,licenseplatearea,thelicenseplaterecognitionofthreeparts.Theimagesoftheneedtoidentifythespecificprocessisdividedinto:read,sizenormalization,licenseplatetiltcorrection,preliminarylocalizationandshearplateregionextraction,sizenormalization,shearoffagaintoextractthelicenseplateframe,binarization,OCRtraining,OCRninesteps.Locatelicenseplateareaisthemostkeystepoflicenseplaterecognitionalgorithm,thisdesignmainlyadoptsanHSLcolormodethresholdandmorphologicalprocessing.Licenseplaterecognitionalgorithmisusedinthetemplatematchingmethod,isthroughtheimplementationoftheLABVIEWvisualaideOCRfunction.Inandoutonthefurtherdesignofparkingmanagementsystem,themainuseLABSQL,andcooperatewiththedevelopmentofSQLcommands.Thevehicleinandoutofthedoorcanbeautomaticallyidentification,registration,billing.Monthlyvehiclefortemporaryparkingpricing,ontimeincaseofnocharge.Totest150samples,thelicenseplatelocalizationsuccess148,totallyidentified125plates,testtherecognitionrateis83.3%.Keywords:VehiclelicenseplaterecognitionManagementofparkinglotVisionAssistantLBSQL成都学院毕业设计（论文）I目录第1章绪论...................................................................................................................................................11.1研究背景及意义..............................................................................................................................11.2涉及热门研究领域现状..................................................................................................................11.2.1车牌识别研究现状...............................................................................................................11.2.2机器视觉研究现状...............................................................................................................21.3主要研究内容..................................................................................................................................2第2章系统总体设计...................................................................................................................................32.1车牌识别原理概述..........................................................................................................................32.2设计方案..........................................................................................................................................42.2.1开发平台选择.......................................................................................................................42.2.2车牌识别设计方案...............................................................................................................52.3相关软件简介..................................................................................................................................62.3.1LABVIEW简介......................................................................................................................62.3.2NI视觉开发模块简介...........................................................................................................7第3章车牌识别程序设计...........................................................................................................................83.1图像读取与简单预处理..................................................................................................................83.2车牌区域定位剪切..........................................................................................................................83.2.1车牌的倾斜校正...................................................................................................................93.2.2车牌的初步定位剪切................