大学本科毕业论文设计
基于单片机的图像处理系统设计
目 录
1 绪论………………………………………………………………………………………（1） 1.1 课题背景……………………………………………………………………………（1） 1.2 国内外的技术发展及现状…………………………………………………………（1） 1.3 本文研究工作………………………………………………………………………（2） 1.4 本文的内容和结构…………………………………………………………………（2） 2 系统总体设计……………………………………………………………………………（3）
2.1汽车牌照自动识别系统工作原理………………………………………………… （3）
2.2图像预处理…………………………………………………………………………（3） 2.3硬件简介…………………………………………………………………………… （4） 3 模块设计…………………………………………………………………………………（5） 3.1 车牌图像的灰度化…………………………………………………………………（5） 3.1.1灰度图像………………………………………………………………………（5） 3.1.2灰度化方法……………………………………………………………………（6） 3.2 灰度图像的二值化…………………………………………………………………（6） 3.2.1 二值图像…………………………………………………………………… （6） 3.2.2二值化方法……………………………………………………………………（7） 4 硬件实现…………………………………………………………………………………（8） 4.1 硬件组成………………………………………………………………………… （8） 4.2 结果分析………………………………………………………………………… （8） 结论…………………………………………………………………………………………（9） 参考文献………………………………………………………………………………… （10）
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湖北大学本科毕业论文设计
摘 要
图像处理技术是信息科学中近几十年来发展最为迅速的学科之一。目前，数字图像处理技术被广泛应用于航空航体、通信、医学及工业生产领域中。图像处理系统的硬件实现一般来讲有三种方式：专用的图像处理器件主要有专用集成芯片(Application Specific Integrated Circuit )、数字信号处理器(Digital Signal Process)和现场可编程门阵列(Field Programmable Gate Array)以及相关电路组成。它们可以实时高速完成各种图像处理算法。对于那些数据量不大，速度要求不高的低层图像处理的场合，单片机的图像处理则系统非常合适，比如车牌识别系统，纸币号码识别系统等。
车牌识别是智能交通系统的重要组成部分，作为图像处理技术的一个应用，它在交通控制与监视中有着多种用途，目前已广泛应用于各种领域。伴随着世界各国汽车数量急剧增加，城市交通状况日益引起人们的重视，如何有效地进行交通管理，已成为越来越多人关注的焦点，解决这些问题的关键就是建立智能交通系统。
本文对一套完整的车辆牌照识别方法进行研究。主要内容包括综述了国内外流行的车辆牌照识别技术，分别介绍了车辆牌照系统的每一个组成部分和国内外的识别方法:采用基于灰度图像的二值化算法对图像进行二值化，分析基于连通域搜索的车牌照粗定位算法，根据车牌照本身的特点，提取车辆牌照区域特征，对车牌进行精确定位。对于车牌区域，采用基于彩色模型的车牌区域的二值化算法。以及结合垂直投影和连通域对车牌区域进行字符分割，进而解决字符粘连和过度分割的问题。分割结束后提取字符的加权组合特征，利用模板匹配法进行车牌照字符识别。
本文针对车牌识别系统设计了一种基于单片机的简单图像处理系统。将MSP430作为处理器件用于车牌自动识别系统中，完成彩色车牌图像的灰度化以及二值化任务，以便后续处理，最终识别出车牌号码。
【关键词】 图像处理系统 单片机 车牌识别 灰度化 二值化
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大学本科毕业论文设计
Abstract
Image Processing is one of the subjects expanding rapidly in the field of information science during the past several decades．At present，it has applied extensively in many subjects Such as aviation,medicine communications，and industry etc．etc．General speaking，there arc 3 kinds of image processing systems to implement the digital image processing algorithms，the main chips of the each system are ASIC(Application Specific Integrated Circuit)，DSP(Digital Signal Process chip)and FPGA(Field Programmable Gate Array).The image processing system with MCU is especially good at Simple processing when those data quantity is not big, and the speed requirement of low level image processing, such as License plate recognition system, paper currency number recognition system.
As an application of image processing technology，Vehicle license plate recognition system is the crucial part of the ITS. It is widely used in vehicle monitoring and traffic control. With the increment of vehicle all over the world, the situation of city traffic has attracted the attention of people. How to control the traffic effectively has become the problem which more and more people pay close attention to. The way to solve this problem is to establish the ITS—Intelligent Transportation System .
This paper deals with a complete VLPR system，over viewing the development history of the VLPR’S technique and introducing the every component of VLPR system as well as domestic and international method of recognition:a rough classification method of vehicle license plate that is based on the search of the connected area is presented after an image binarization method is discussed Oil the basis of the gray image translation in this paper,．Then the accurate classification of vehicle license plate is made after the features of the plate area ate extracted in the line with the inherent features of the vehicle license plate．This paper also purposes a license plate oriented image binarization that is based on color model and the combination of the method of connected area and perpendicular shadow to segment the character of the plate to solve characters stuck and over-segmentation．Therefore，the character of the plate will be recognized with the application of the method of model matching and the character recognition using combination features after the segment of the character in the plate．
In this paper,a Simple image processing system using MCU has been designed and setup for License plate recognition.This experiment attempts to use the MSP430 —MCU to implement the recognition task ,including Image Graying,Image Binary, so that subsequent processing for the recognition of the license plate number finally .
【Key words】 image process system MCU License plate recognition Image Graying Image Binary
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