基于matlab车牌识别系统设计与实现.

南阳理工学院本科生毕业设计(论文)学院：电子与电气工程学院专业：电气工程及其自动化学生：指导教师：完成日期2014年5月南阳理工学院本科生毕业设计（论文）车牌识别系统设计与实现DesignandImplementationofLicensePlateRecognitionSystem总计：30页表格：1个插图：19幅南阳理工学院本科毕业设计（论文）车牌识别系统设计与实现DesignandImplementationofLicensePlateRecognitionSystem学院：电子与电气工程学院专业：电气工程及其自动化学生姓名：学号：指导教师（职称）：评阅教师：完成日期：南阳理工学院NanyangInstituteofTechnology车牌识别系统设计与实现I车牌识别系统设计与实现[摘要]汽车车牌的识别系统是现代智能交通管理的重要组成部分之一。车牌识别系统使车辆管理更智能化，数字化，有效的提升了交通管理的方便性和有效性。车牌识别系统主要包括了图像采集、图像预处理、车牌定位、字符分割、字符识别等五大核心部分。本文主要介绍图像预处理、车牌定位、字符分割三个模块的实现方法。本文的图像预处理模块是将图像灰度化和用Roberts算子进行边缘检测的步骤。车牌定位和分割采用的是利用数学形态法来确定车牌位置，再利用车牌彩色信息的彩色分割法来完成车牌部位分割。字符的分割采用的方法是以二值化后的车牌部分进行垂直投影，然后在对垂直投影进行扫描，从而完成字符的分割。[关键词]：MATLAB；图像预处理；车牌定位；字符分割DesignandImplementationofLicensePlateRecognitionSystemElectricalEngineeringandAutomationSpecialtyYangHui-binAbstract:Carlicenseplaterecognitionsystemisanimportantpartofthemodernintelligenttrafficmanagement.Thevehiclelicenseplaterecognitionsystemmanagementmoreintelligent,digital,effectivelyimprovetheconvenienceandeffectivenessoftrafficmanagement.LicensePlateRecognitionsystemincludesfivecorepartoftheimageacquisition,imagepreprocessing,licenseplatelocation,charactersegmentationandcharacterrecognition.Thispaperdescribestheimagepreprocessing,licenseplatelocation,charactersegmentationmethodofthreemodules.Imagepre-processingmoduleofthisarticleistoimagegrayandstepbyRobertsoperatoredgedetection.Platepositioningandsegmentationusingmathematicalmorphologyisusedtodeterminethelicenseplatelocationmethod,andthenusethecolorinformationofthelicenseplatecolorsegmentationmethodtocompletethelicenseplatepartsdivision.Themethodusedisbasedonthecharactersegmentationplateafterbinarizingtheverticalprojection,theprojectionandtheverticalscanning,tocompletesplitcharacters.Keywords：MATLABsoftwar;imagepreprocessing;licenseplatelocalization;charactersegmentation目录车牌识别系统设计与实现II1引言................................................................................................................................11.1车牌号识别系统概述..........................................................................................11.2MATLAB介绍....................................................................................................22车牌识别系统整体方案设计........................................................................................22.1系统的基本原理.................................................................................................22.2系统硬件设计.....................................................................................................32.3系统软件设计.....................................................................................................42.3.1图像预处理及其MATLAB实现..........................................................52.3.2车辆号码牌定位......................................................................................62.3.3车辆号码牌的字符分割...........................................................................62.3.4车辆号码牌的识别..................................................................................63图像预处理及其MATLAB实现.................................................................................73.1图像的读取.........................................................................................................73.2图像的灰度化处理.............................................................................................83.3图像的边缘检测及提取.....................................................................................93.4图像的平滑处理...............................................................................................104车辆号码牌定位..........................................................................................................124.1车辆号码牌的区域分割...................................................................................124.2车牌号码的初定位............................................................................................134.2.1图像二值化的基本原理........................................................................144.2.2车辆号码牌的二值化............................................................................155车辆号码牌的字符分割..............................................................................................175.1字符分割............................................................................................................175.2字符归一化.......................................................................................................186车辆号码牌的识别......................................................................................................18结束语..............................................................................................................................20参考文献..........................................................................................................................21附录..................................................................................................................................22致谢..................................................................................................................................30车牌识别系统设计与实现11引言1.1车牌号识别系统概述（1）车牌号