目 录
1 绪论...................................................................................................................... 1
1.1 研究目的和意义.............................................................................................................................................1
1.2 国内外研究现状.............................................................................................................................................2
1.3 我国车牌分析.................................................................................................................................................3
1.4 本文章节安排.................................................................................................................................................4
2 数字图像处理概述................................................................................................... 5
2.1 图像及其组成要素.........................................................................................................................................5
2.2 数字图像及其表示.........................................................................................................................................5
2.3 数字图像处理基础.........................................................................................................................................6
2.4 MATLAB 在数字图像处理中的应用...........................................................................................................6
3 车牌识别系统的原理及方法.....................................................................................8
3.1 车牌识别系统简述.........................................................................................................................................8
3.2 车牌图像预处理.............................................................................................................................................9
3.2.1
图像灰度化
..............................................................................................................................................9
3.2.2
边缘检测
................................................................................................................................................10
3.2.3
形态学图像处理
....................................................................................................................................10
3.3 车牌定位原理...............................................................................................................................................11
3.4 车牌字符分割...............................................................................................................................................13
3.4.1
字符分割
................................................................................................................................................13
3.4.2
字符归一化处理
....................................................................................................................................13
3.5 字符识别.......................................................................................................................................................13
3.5.1
字符识别简述
........................................................................................................................................13
3.5.2
字符识别分类
........................................................................................................................................14
3.5.3
基于模板匹配的字符识别
....................................................................................................................14
4 运用 MATLAB 实现车牌识别...................................................................................17
4.1 车牌图像灰度化...........................................................................................................................................17
4.1.1
程序分析
................................................................................................................................................17
4.1.2
结果分析
................................................................................................................................................18
4.2 车牌图像预处理...........................................................................................................................................19
4.2.1
程序分析
................................................................................................................................................19
4.2.2
结果分析
................................................................................................................................................20
4.3 牌照定位.......................................................................................................................................................21
4.3.1
程序分析
................................................................................................................................................21
4.3.2
结果分析
................................................................................................................................................23
4.4 字符分割.......................................................................................................................................................23
4.4.1
程序分析
................................................................................................................................................23
4.4.2
结果分析
................................................................................................................................................25