| 基于字符角点信息的车牌定位方法 |
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| 引用本文： | 秦钟,徐建闽,史胜利,黄海英.基于字符角点信息的车牌定位方法[J].华南理工大学学报(自然科学版),2006,34(4):19-23. |
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| 作者姓名： | 秦钟 徐建闽 史胜利 黄海英 |
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| 作者单位： | 华南理工大学,交通学院,广东,广州,510640 |
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| 基金项目： | 中国科学院资助项目;广东省科技攻关项目 |
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| 摘 要： | 车牌定位是车牌识别的基础．文中提出了一种准确快速的车牌定位方法．该方法利用三级阈值，由粗到细，首先剔除大量非角点像素，提高角点的定位速度，用大阈值突出显示车牌区域的角点，再根据车牌纹理的角点特性，利用滑动窗粗选车牌区域，然后对粗选车牌区域用小阈值，对车牌区域进行精确定位．试验证实该方法的车牌定位准确率达到98％，平均耗时约20ms．
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| 关 键 词： | 车牌定位 车牌识别 角点检测 字符角点 角点分布特征 |
| 文章编号： | 1000-565X（2006）04-0019-05 |
| 收稿时间： | 2005-06-13 |
| 修稿时间： | 2005-06-13 |
Locating of License Plate Based on Character Corner Information |
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| Qin Zhong,Xu Jian-min,Shi Sheng-li,Huang Hai-ying.Locating of License Plate Based on Character Corner Information[J].Journal of South China University of Technology(Natural Science Edition),2006,34(4):19-23. |
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| Authors: | Qin Zhong Xu Jian-min Shi Sheng-li Huang Hai-ying |
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| Institution: | College of Traffic and Communications, South China Univ. of Tech. , Guangzhou 510640, Guangdong, China |
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| Abstract: | A method for locating the license plate with high speed and great accuracy is put forward for the license plate recognition. In the locating process, a system of three-level thresholds, ranging from roughness to fineness, is adopted to eliminate a number of non-corner pixels first, which speeds up the locating of the plate corners. Then, a big corner detection threshold is used to foreground the corners in the license plate region, and a slid window is used to approximately detect the license plate. Finally, the detected plate is accurately located using a smaller corner detection threshold. Experimental results show that, by the proposed method, the locating accuracy is rated at 98% and the time cost is reduced to about 20ms. |
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| Keywords: | license plate locating license plate recognition comer detection character comer corner distribution feature |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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