| Top-hat变换在多车牌定位中的应用 |
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| 引用本文： | 尚赵伟,国庆,朱贝贝,袁博,张峰,谭国飞.Top-hat变换在多车牌定位中的应用[J].计算机工程与应用,2011,47(29):214-217. |
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| 作者姓名： | 尚赵伟 国庆 朱贝贝 袁博 张峰 谭国飞 |
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| 作者单位： | 1. 重庆大学计算机学院,重庆,400030
2. 湖北财税职业学院信息工程系,武汉,430064 |
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| 基金项目： | 国家自然科学基金重点项目(the Key National Natural Science Foundation of China under Grant No.90820306) |
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| 摘 要： | 为了提高多车牌定位的精度,提出了一种基于Top-hat变换的车牌定位算法。该算法根据车牌纹理的空间分布特点和Top-hat变换的特点,以Top-hat系数为依据,通过平滑、二值化、垂直信息提取、连通、密度计算等多个操作完成车牌定位,该算法可对单、多车牌定位。以实际监控的图像为实验数据,通过对比实验,其结果表明:在不同背景情况下,方法在定位精度、漏判率和误判率等方面均优于其他算法。
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| 关 键 词： | 图像处理 Top-hat变换 形态学 车牌定位 |
| 修稿时间： | |
Multi-license plate localization algorithm based on Top-hat transform |
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| SHANG Zhaowei,GUO Qing,ZHU Beibei,YUAN Bo,ZHANG Feng,TAN Guofei.Multi-license plate localization algorithm based on Top-hat transform[J].Computer Engineering and Applications,2011,47(29):214-217. |
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| Authors: | SHANG Zhaowei GUO Qing ZHU Beibei YUAN Bo ZHANG Feng TAN Guofei |
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| Affiliation: | 1.College of Computer Science,University of Chongqing,Chongqing 400030,China 2.Hubei Finance & Taxation College,Wuhan 430064,China |
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| Abstract: | In this paper, a new algorithm which can improve the accuracy of vehicle license plate location using Top-hat transform is presented.Based on texture feature of license plates and the characteristic of Top-hat transform,the Top-hat coef- ficients are retained.The license plate can he located through smoothing, vertical direction information, four connected region detection,density calculation and so on.The proposed algorithm is suitable for the single-license and multi-license plate detec- tion in the various illumination conditions with high accuracy.The performance of the proposed algorithm has been tested on monitoring images obtained from the practical application.Experimental results show that this algorithm has better perfor- mance than others＇ on location preqision,misdetection rate,and misjudgment rate. |
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| Keywords: | image processing Top-hat transform morphology vehicle license plate localization |
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