摘要
车牌定位是车牌识别中的关键步骤。为了能在复杂背景和不同光照条件下快速、准确地定位车牌位置,提出了一种基于边缘检测和投影法的车牌定位方法。该方法首先对车牌图像实施边缘检测、二值化等预处理,然后在此基础上,利用基于双向回溯的投影法确定车牌的上下左右边界。实验结果表明,该方法定位速度快、准确率高。
License plate location is one of the key steps in the license plate recognition.In order to obtain accurate location of vehicle plate quickly under complicated background and different illumination condition,this paper proposes a kind of locating method based on edge detection and projection.First,this method carries out preprocessing such as edge detection and two-valuation.Then the projection approach based on two-way back is adopted to examine up-down and left-right boundary of the car license.The experiment results indicate that the presented method is excellent in accuracy with a good speed.
出处
《科技通报》
北大核心
2010年第3期438-441,共4页
Bulletin of Science and Technology
基金
浙江省科技计划资助项目(2007C21170)
关键词
车牌定位
行扫描
边缘检测
垂直投影
license plate location
line scanning
edge detective
vertical projection
