基于分块投影和形态学处理的多车牌定位方法

Multiple license plate location based on separation projective and morphology operation

针对多车牌定位中候选区域过多和结构元素选择不合理的问题,提出了一种基于分块投影和形态学分块处理的多车牌定位方法。对车牌图像进行预处理和水平差分处理,应用分块水平投影方法粗略定位车牌区域,用形态学分块处理确定车牌的候选区域,最后用车牌的特征去除伪车牌,定位出多个车牌。仿真实验结果表明,该方法能减少车牌候选区域,提高多车牌定位的效率。

For the location of multiple license plates often has the problem of that too many candidate of license plate can be extracted and structuring element designed unreasonably,this paper presented a method for multiple license plate location based on separation projective and morphology operation.Firstly,it preprocessed and operated the gray image by horizontal difference;it could located the position for candidate of license plate roughly by separation horizontal projection.Then it detected candidate license plates by morphological block operations.Finally,it located the multiple license plates according to the features of vehicle license plate.The results of experiments show that the method in the text can reduce the quantity of candidate license plates largely and have higher accuracy and efficiency.