车辆号牌是车辆唯一身份证，它的特殊性与重要性决定车牌识别系统成为城市智能交通管理系统中不可或缺的重要组成部分。车牌识别（LPR）系统是以图像处理、模式识别等技术为基础的智能识别系统，通过摄像机所拍摄道路上行驶的车辆图像进行车牌号码的识别。过程涉及：车辆检测——图像采集——预处理——车牌定位——字符分割——字符识别——结果输出。
The vehicle number plate is the only ID card of the vehicle. Its particularity and importance determine that the license plate recognition system has become an indispensable part of the urban intelligent traffic management system. License plate recognition (LPR) system is an intelligent recognition system based on image processing, pattern recognition and other technologies. It recognizes the license plate number through the vehicle image taken by the camera on the road. The process involves: vehicle detection - image acquisition - preprocessing - license plate location - character segmentation - character recognition - result output.