本文基于对车牌自动分识别系统中牌照图像预处理、字符分割和字符识别等关键技术的研究。采用改进的BP神经网络模式识别技术，以车牌字符作为识别对象，设计实现了一个自动识别系统。-Based on the automatic license plate recognition system license image preprocessing, character segmentation and character recognition key technological research and development. Improved BP neural network pattern recognition technology to identify the object as a license plate characters, designed and implemented an automatic identification system.