车牌自动识别分为图像预处理、车牌定位、字符分割、字符识别四步。利用形态学变换对图像进行滤波聚类,HOUGH变换对车牌图像进行水平校正,BP神经网络的方法进行字符识别,最后基于DELPHI7.0环境下设计开发了车牌自动识别系统。
The vehicle license plate automatic recognition system mainly includes four steps:image processing methods, license plate segmentation, character segmentation and character identification. The paper proposes a method of locating and adjusting license plates in images, integrating various image processing methods morphological methods etc. Experiments prove that algorithm is fast and accurate.