| 基于Top-Hat预处理和小波能量分析的车牌定位算法 |
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| 引用本文： | 侯阿临,徐欣,史东承,陈勇.基于Top-Hat预处理和小波能量分析的车牌定位算法[J].吉林大学学报(信息科学版),2007,25(3):342-347. |
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| 作者姓名： | 侯阿临 徐欣 史东承 陈勇 |
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| 作者单位： | 长春工业大学,计算机科学与工程学院,长春,130012;江苏盐城医保中心,江苏,盐城,224000 |
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| 摘 要： | 针对车牌定位不准的问题,提出一种新的数学形态学变换结合小波分析的车牌快速定位方法。该方法对Top-Hat变换图像二值化,然后分别在水平与垂直方向投影,在对投影信号进行一维小波分析的基础上,利用小波多分辨率特性结合车牌位置信息来缩小搜索范围,从而提高了定位精度和实时性。对多幅图像利用该算法进行车牌定位,平均定位时间0.125 s,与其他几种常见算法进行仿真试验比较表明,该算法具有较好的实时性和鲁棒性。
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| 关 键 词： | 车牌定位 Top-Hat变换 数学形态学 小波多分辨率 |
| 文章编号： | 1671-5896（2007）03-0342-06 |
| 收稿时间： | 2006-05-25 |
| 修稿时间： | 2006-05-25 |
License Plate Location Algorithm Based on Top-Hat Preprocessing and Wavelet Energy Analysis |
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| HOU A-lin,XU Xin,SHI Dong-cheng,CHEN Yong.License Plate Location Algorithm Based on Top-Hat Preprocessing and Wavelet Energy Analysis[J].Journal of Jilin University:Information Sci Ed,2007,25(3):342-347. |
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| Authors: | HOU A-lin XU Xin SHI Dong-cheng CHEN Yong |
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| Institution: | 1. School of Computer Science and Engineering, Changchun University of Technology, Changchun 130012, China ; 2. Medical Insurance Center of Jiangsu Yancheng, Yaneheng, 224000, China |
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| Abstract: | A new license location algorithm based on mathematical morphology and wavelet transform was provided to solve the problem of inaccuracy.Firstly,the interference of background was deduced by using Top-Hat transform.Then,the signal of binary picture projection was analyzed by wavelet transform.The location accuracy and real-time had been increased by reducing the search field with license position information.By this algrithm,the mean time of location is 0.125 s,the emulative experiment results demonstrated that the method has better location accuracy and robustness. |
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| Keywords: | license plate location Top-Hat transform mathematical morphology wavelet multiresolution |
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