Secondly, when I preprocess the aberrance image, I use an arithmetic based on theline features of characters, then segment the image of characters based on improvedproject features.

• (2)车牌字符分割阶段，为了满足算法实时性的要求，对畸变车牌进行预处理时，采用字符的行特征来描述本文的倾斜校正算法，之后，基于改进的投影特征图对字符图像分割；