一种复杂环境下快速车牌定位的新方法  

A novel method for fast license plate location under complex environments

作　　者：孙露[1] 乔双[1] 

机构地区：[1]东北师范大学物理学院,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2013年第2期90-94,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(11275046);吉林省科技发展计划项目(20110358;20111804);长江学者和创新团队发展计划项目

摘　　要：针对低对比度和环境复杂情况下,车牌定位时间长和准确率低的问题,提出了一种快速车牌定位的新方法.该方法首先根据边缘密度以及亮度方差进行局部图像增强,然后采用一种高效的算法去除冗余边缘,最后使用水平投影及自适应搜索窗来精确定位并分割车牌.实验验证了该方法完全满足复杂环境下实时车牌定位的要求.To solve the problems of current methods in complex scenes,this paper presented a novel method for fast license plate location.Based on the edge density and luminance variance,the vehicle image was enhanced by local image enhancement firstly,then an efficient method was introduced for removing redundant edges to improve the edge image,and finally the plate was located by horizontal projection and sliding a adaptive window in the residual edge image.Experimental results demonstrated the new method could meet the requirements of real-time license plate location in complex scenes.

关 键 词：车牌定位 局部图像增强 冗余边缘去除 自适应搜索窗 

分 类 号：O571[理学—粒子物理与原子核物理]