基于几何约束的车牌倾斜检测方法

摘要

This paper propose a new skew detection algorithm,which is based on the lowest pixels of a set of characters.The skew angle is evaluated by applying moment calculation,and the method to get characters in one text-line is described in detail.It shows that the proposed algorithm has fast speed and high precision.%提出了一种新的基于车牌图像几何约束的车牌倾斜角自动检测算法.算法以车牌字符轮廓的最低点为基本信息,用矩的方法确定车牌的倾斜角度.本算法创新性地采用字符顶点的几何约束信息再用矩的方法得到倾斜角度.结果表明,该算法运算量小,速度快,校正精度高.