基于二进小波变换的多车牌定位算法  

Multi-license Plate Localization Algorithm Based on Dyadic Wavelet Transform

作　　者：尚赵伟[1] 国庆[1] 马尚君[2] 袁博[1] 杨建伟[3] 

机构地区：[1]重庆大学计算机学院,重庆400030 [2]西北工业大学机电学院,西安710072 [3]南京信息工程大学数理学院,南京210044

出　　处：《计算机工程》2011年第3期16-18,共3页Computer Engineering

基　　金：国家自然科学基金资助重点项目(90820306);国家自然科学基金资助面上项目(60973157)

摘　　要：为提高多车牌定位的精度,提出一种基于二进小波变换的车牌定位算法。该算法可对单、多车牌定位,具有精度高、对光照影响不显著等特点。以实际监控的图像为实验数据进行对比,结果表明,在不同背景和不同光照情况下,基于二进小波变换的车牌定位算法在定位精度、漏判率和误判率等方面均优于基于金字塔分解的定位算法。An algorithm which can improve the accuracy of vehicle license plate location using dyadic wavelet transform is presented. Based on texture feature of license plates and the characteristic of dyadic wavelet transform, the wavelet coefficients in vertical direction are retained. The proposed algorithm is suitable for the single-license and multi-license plate detection in the various illumination conditions with high accuracy. The performance of the proposed algorithm is tested on monitoring images obtained from the practical application. Experimental results show that the algorithm has better performance than Mallat＇s on location precision, misdetection rate, and misiudzment rate.

关 键 词：二进小波 车牌定位 形态学 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]