一种改进的车牌定位算法研究  

Research on an Advanced License Plate Location Method

作　　者：于京生[1] 张晶[1] 

机构地区：[1]石家庄学院,河北石家庄050035

出　　处：《现代电子技术》2008年第14期85-88,共4页Modern Electronics Technique

基　　金：河北省教育厅自然科学基金项目(Z2007428)

摘　　要：为了实现车牌的准确定位及后续的车牌识别,提出一种改进的车牌定位算法。该方法首先对预处理后的车牌图像进行模板匹配来大致确定车牌区域,为了节约运算时间,对模板匹配法进行优化。接着,运用形态梯度方法对粗定位后的图像进行边缘检测,从而更好地保持车牌的边缘。最后,采用投影法进行精确定位,通过对投影的分析找到车牌的准确位置。实验结果表明,该算法对车牌定位的准确性和处理速度都有很大提高,基本满足了系统实时性和准确性的要求。In order to realize license plate location exactly and recognition,an advanced license plate detection method is proposed, At first,this algorithm which is applied to the license plate image after being preprocessed locates the license plate approximately with template matching and a method which can shorten time is introduced. Then edge detection based on morphological grads provides better license plate＇s edge and is propitious to locate exactly. Finally, projection afforded exact location and the license plate location can be got through projection analysis. The experiment results indicate that the algorithm given is able to improve the veracity and enhance the speed. It can satisfy real - time and veracity requirements of the system.

关 键 词：车牌定位 模板匹配 形态梯度 投影分析 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]