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南 京 工 程 学 院

毕业设计说明书(论文)

院 系： 计算机工程学院 专 业： 电子信息科学与技术 题 目： 基于MATLAB的车牌识别系统设计

2013年5月 南 京

毕业设计说明书（论文）中文摘要

随着计算机多媒体技术的发展，车牌自动识别技术(license plate recognition)已经成为智能交通系统的重要组成部分。在欧美许多发达国家，车辆识别技术已经广泛的应用在交通管理的各个方面。由于我国车牌种类多，并且是由汉字、英文字母和数字组成，这给自动识别系统的设计带来较大的难度。 本文在学习研究图像处理理论的基础上，设计了一个车牌自动识别系统。本系统包括三个主要模块：车辆图像预处理、车牌定位和车牌字符识别。识别系统处理过程主要包括获取车辆源图像、图像灰度化、图像增强去噪、边缘检测、车牌定位、车牌图像预处理、车牌字符分割、字符识别等部分，其中车牌定位和字符识别部分是整个系统设计的核心和难点。 车牌识别系统可以广泛应用在高速公路自动收费、小区无人停车场、城市道路监控、车辆流量统计等方面，本系统具有一定的实用价值。 关键词：车牌识别 车牌定位 LPR 模式识别

毕业设计说明书（论文）外文摘要 Title Design of the license plate recognition

Abstract With the development of computer multimedia technology, license plate recognition (LPR) has become an important component of Intelligent Transportation Systems. In many developed countries ofEurope and America, the license plate recognition technology hasbeen widely used in all aspects of traffic management. Because plates in China have many different styles, in addition, they consist of Chinese letters, English letters and numbers. So, it's very hard to identify Chinese license plates. This study propose a license plate recognition based on knowledge of image processing. This recognition has three main modules: preprocessing of original image, locate license plate and characters identification. This license plate recognition mainly includes several parts: get original image, make gray, enhance image,edge detect, locate license plate, preprocess plate image, segment characters and characters identification. The key of the whole system is location of license and character recognition. License plate recognition can be extensively used in highway toll collection，Intelligent parking, urban road monitoring, traffic flow statistics and so on, what is more, this recognition canbring some practical value. Key words: plate recognition, plate locate, LPR, pattern recognition