文档介绍：南京工程学院
车辆工程系
本科毕业设计(论文)
题目:基于数字图像处理的车牌定位的研究
专业: 自动化(车辆电子电气)
班级: K车电气081 学号: 240080533
学生姓名: 温一斌
指导教师: 顾新艳讲师
起迄日期: ~
设计地点: 车辆工程实验中心
Graduation Design (Thesis)
License Plate Location Based On Digital Image Processing
By
WEN Yibin
Supervised by
Lecturer. GU Xinyan
Department of Vehicle Engineering
Nanjing Institute of Technology
June, 2012
摘要
随着我国经济的快速发展,智能交通系统将会成为现代交通管理发展的必然趋势。车辆自动识别系统是智能交通系统(ITS)实现的前提。车牌识别是车辆自动识别系统中最有发展前景的技术之一。
车牌识别系统主要由车牌定位、字符分割和字符识别三部分组成。其中,车牌定位是字符分割和字符识别的基础,对整个系统的性能起着至关重要的作用,决定着系统的识别速度和识别精度。
通过视频图像的检测与识别,可以实时检测交通违章现象、识别违章车辆的车牌号码,为公安交通管理部门提供强有力的执法证据。因此,研究交通图像检测与处理方法对智能交通运输系统的发展具有重要的推动作用。本系统采用基于灰度图像进行定位和识别。主要能够对带有车牌的图片灰度化,二值化,中值滤波等处理,并能够截取车牌图片。车牌定位是指将车牌区域从车辆图像中分割出来,是实现整个系统的关键环节。而车牌定位主要包含两个关键技术问题:图像的预处理和车牌定位的算法。本论文主要应用VC语言编程,对其车牌图像进行预处理,有效的解决一些导致识别、定位错误的问题。
关键词:图像处理;车牌定位;二值化;中值滤波
ABSTRACT
With the rapid development of our national economy, Intelligent Transportation Systems will e the trend of modern traffic management development. Automatic vehicle identification is a premise for Intelligent Transportation System(ITS).License Plate Recognition(LPR) is the most promising technique in the automatic vehicle identification system.
LPR consists of License Plate Location, Character Segmentation and Character Recognition. License Plate Location is the base of Character Segmentation and Character Recognition, plays a crucial role in the performance of whole system, and determines the speed and accuracy of system identification.
Through video images of detection and recognition can real-time detection and identification of violate the traffic violations phenomenon plate number for public security traffic management department, provide strong evidence of law enforcement. The focus on the license plate identification system research and implementation process. Mainly with the license plate on the picture to gray level transformation, binarization, median filtering and other processing, and can intercept license plate