字符识别及单片机显示研究(任务书,开题报告,论文12000字)
摘要
字符识别技术一直以来都是视觉与识别领域的综合性研究课题，运用到了数字图像处理技术。车牌作为车辆重要的标志，如同人的姓名具有辨识度，准确识别车牌对于车辆的管理和交通秩序的维持起着巨大的作用。本课题主要通过对车牌校正，车牌预处理，车牌区域提取、分割、识别，然后借助于单片机对车牌进行显示，提出了一套系统完整的字符识别的方法。
本课题主要的研究方法如下：首先利用MATLAB对采集原始图像进行一系列的预处理后，选择合适的阈值对车牌进行分割，然后通过与标准的字符比对，分割出7个字符，进而识别车牌。然后通过编程转化提取标准的8乘8或16乘16字符的二值矩阵，将0、1代码组成的矩阵转化为16字码，从而建立MATLAB与单片机的联系，最后利用STC89C51单片机搭建时钟电路、驱动电路、显示电路实现字符的显示，时钟电路为单片机提供固定频率的运行状态，驱动电路可以选择输出行接到P2口，扫描列接到P0口，利用LED显示屏显示字符，达到显示车牌的目的。
关键词：字符分割 车牌识别 单片机
Study on Character Recognition and MCU Display
Abstract
Character recognition technology has always been a comprehensive research topic in the field of vision and recognition, and it has been applied to digital image processing technology. The license plate as an important symbol of the vehicle, as the name of the person is identifiable, the accurate identification of the license plate plays an important role in the management of the vehicle and the maintenance of the traffic order. This subject mainly through the license plate correction, license plate pretreatment, license plate area extraction, segmentation, identification, and then through the microcontroller to display the license plate, a set of complete system character recognition method.
The main research methods of this topic are as follows:Firstly,after using MATLAB to perform a series of preprocessing on the collected original images,the proper threshold value is selected to divide the license plate,and then the standard characters are compared to divide the seven characters and then identify the license plate..Then through programming transformation to extract the standard 8 by 8 or 16 by 16 binary matrix,the matrix composed of 0,1 code is converted into 16 words,thus establishing MATLAB and the microcontroller.Finally,use STC89C51 microcontroller to build a clock circuit,drive circuit,display circuit to achieve the character display,the clock circuit for the microcontroller to provide a fixed-frequency operating state,the drive circuit can select the output line to receive P2 port,scan column received P0 port,the use of LED display The screen displays characters to achieve the purpose of displaying the license plate.
Key Words：Character segmentation;license plate recognition;single-chip computer
目录
摘要 I
Abstract II
第一章 绪论 1
1.1 课题背景 1
1.2 国内外研究现状 1
1.3 课题目的 2
1.4 课题主要研究的内容 2
第二章 软硬件介绍及电路设计 4
2.1 点阵介绍 4
2.2 芯片简介 4
2.3 Keil软件介绍及配置 5
2.3.1 Keil的配置 6
2.4 电路设计 7
2.4.1 时钟电路 8
2.4.2 复位电路 9
2.4.3 电源电路 9
2.4.4 74HC573简介 10
2.4.5 驱动及显示电路 11
2.5 电路测试 11
第三章 车牌识别系统 13
3.1 车牌处理流程 13
3.2 原始图像 13
3.3 倾斜校正 13
3.4 图像预处理 14
3.4.1 图像的边缘检测 15
3.4.2 图像的腐蚀 16
3.4.3 图像闭运算 17
3.4.4 移除细小部分 17
3.5 提取车牌区域 18
3.6 字符切割 20
3.7 图像识别 21
3.8 简单的GUI设计 22
3.9 总结 23
第四章 提取矩阵及显示字符 24
4.1 提取字符矩阵 24
4.2 矩阵规范化 25
4.3 8×8点阵行扫描显示车牌 26
4.3.1 8×8点阵的不足 28
4.4 16×16点阵的制作和测试 28
4.5 显示车牌字母“C” 30
4.6 16×16点阵列扫描车牌显示 31
第五章 结语 34
参考文献 35
致谢 36 |
