基于Opencv车牌识别工具研究及实现.docVIP

摘 要 近年来随着智能交通系统的全面实施，车牌自动识别(License Plate Recognition，LPR)技术应用越来越广泛。车牌识别作为目前智能交通系统不可或缺的一部分，已经普遍的应用到各个领域。 本文主要研究汽车牌照自动识别技术，通过研究国内现有车牌特征，使用相关识别算法，利用VC++和OpenCV（计算机视觉库）等开源库，开发了一个车牌识别工具。该工具可以使用数字图像处理技术，模式识别，计算机视觉分析技术，对图像进行处理、定位、分割，从而实现车牌识别，准确获取车牌号码。 本文使用水平分割、垂直分割和车牌大小归一化技术对预处理之后的图像进行定位，同时利用 OpenCV库中的边缘检测方法将已定位好的车牌区域进行分割、保存，对已经分割的图像使用字符切割算法进行切割，最终将切割的字符保存为单个的字符图像，使用已有的字符模板进行特征值匹配，实现字符识别功能。 最后本文对已经完成的车牌识别工具进行了实验，实验结果表明该工具可以快速准确的进行车牌号码识别。 关键词： OpenCV；车牌定位；车牌识别 ABSTRACT In recent years, with the full of implementation intelligent transport systems, automatic license plate recognition (License Plate Recognition, LPR) technology is widely applied. License Plate Recognition as the current integral part of intelligent transportation systems has been widely applied to various fields. This paper studies the automatic license plate recognition technology, by studying the characteristics of existing domestic license to use the relevant recognition algorithm, using VC++ and OpenCV (computer vision library) and other open source library, developed a license plate recognition tools. The tool can be used on digital image processing, pattern recognition, computer vision analysis of image processing, positioning, segmentation, enabling license plate recognition, license plate number to obtain accurate. This article uses the horizontal split, vertical split, and the license plate size normalization after the image preprocessing techniques to locate, while using OpenCV library edge detection method will have good positioning region segmentation, preservation, has been the use of image segmentation Save character cut algorithm for cutting, the character will eventually cut into individual character images, using existing character template feature values ??match, the realization character recognition function. Finally, on the license plate recognition tools have been completed experimental results show that the tool can be quickly and accurately identify the license plate number. Keyword