| LPR系统车牌定位提取方法的研究 |
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| 引用本文： | 朱俊梅,陈少平. LPR系统车牌定位提取方法的研究[J]. 计算机工程与应用, 2008, 44(14): 198-201. DOI: 10.3778/j.issn.1002-8331.2008.14.056 |
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| 作者姓名： | 朱俊梅 陈少平 |
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| 作者单位： | 中南民族大学 电子信息工程学院,武汉 430074 |
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| 摘 要： | 车牌定位在车牌自动识别中起着非常重要的作用，定位准确度直接影响车牌识别的正确率。文中使用了数学形态学和几何拓扑学相结合的方法对车牌区域进行定位提取。该方法首先采用Top-Hat变换以及开、闭运算对抓拍的车辆图像进行预处理；然后采用连通体态分析法（CCA）对图像进行粗定位；最后对计算得到的车牌候选区的欧拉数进行判别，最终提取真正的车牌区域。实验证明该方法能够很好的对牌照区域顶角进行快速搜索定位，将牌照从复杂背景图像中分割出来。
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| 关 键 词： | 车牌识别 车牌定位 数学形态学 几何拓扑学 |
| 文章编号： | 1002-8331(2008)14-0198-04 |
| 收稿时间： | 2007-08-23 |
| 修稿时间： | 2007-08-23 |
Vehicle license plate location and segmentation in LPR system |
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| ZHU Jun-mei,CHEN Shao-ping. Vehicle license plate location and segmentation in LPR system[J]. Computer Engineering and Applications, 2008, 44(14): 198-201. DOI: 10.3778/j.issn.1002-8331.2008.14.056 |
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| Authors: | ZHU Jun-mei CHEN Shao-ping |
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| Affiliation: | College of Electronics and Information Engineering,South-Central University for Nationalities,Wuhan 430074,China |
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| Abstract: | Vehicle license plate locating is one of the key technologies for automatic License Plate Recognition(LPR),and has a great impact on character segmentation and character recognition.In this paper,morphology and topology are used in plate location.Image preprocessing is first adopted,which is implemented by Top-Hat transform,opening and closing operations.Connected components analysis is then performed to detect candidate regions.At last,the real license plate area is obtained according to the Euler number of candidate regions.Experiments show that it can realize the fast search and location of the corner angles of the license plate and segment the license plate from the complex image. |
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| Keywords: | license plate recognition license plate location morphology topology |
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