基于Matlab的车牌识别算法.docVIP

基于Matlab的车牌识别算法 摘要 车牌系统是计算机视觉和模式识别技术在智能交通领域的重要应用课题之一。车牌识别系统是以特定目标为对象的专用计算机系统，该系统主要包括三个内容:车牌定位、字符分割和字符识别。 其中车牌定位的目的就是从所拍摄的汽车图像中确定车牌的位置,从而便于后续的字符分割和字符识别工作。目前常用的方法有：基于模板匹配的方法、基于特征的方法和神经网络法等。 本设计采用基于模板匹配算法和基于人工神经网络LICENSE PLATE RECOGNITION ALGORITHM BASED ON MATLAB ＡＢＳＴＲＡＣＴ License plate system is a computer vision and pattern recognition technology in one of the important application research topic in the field of intelligent transportation. License plate recognition system based on specific goals of a special computer system, the system mainly includes three contents: license plate locating, character segmentation and character recognition. One of the purpose of license plate location is taken from the auto locate the license plate in the image, so as to facilitate the subsequent work character segmentation and character recognition. Now commonly used methods are: based on template matching method, based on the characteristics of the method and neural network, etc. This design USES based on template matching algorithm and based on artificial neural network algorithm to locate license plate recognition, the algorithm is only for blue white license plate segmentation recognition, the algorithm can be directly applicable in principle to the black white plate,. This algorithm to segment the image pixel values and template image, thus to avoid the cut out in the process of image pixel values are not consistent. But black on white background and black text plate, yellow bottom plate, adjustments need to license plate localization algorithm, and the image inversion of (0, 1, 1, 0). Key words: license plate recognition system; Character segmentation; License plate location 目录 1 前言 4 1.1 车牌号识别研究背景 4 1.2 车牌号识别技术研究现状和趋势 5 1.2.1国内外车牌识别技术情况及我国车牌特点 5 1.2.2车牌识别技术的应用前景 7 1.3 车牌识别研究内容 7 2 车牌识别系统设计原理概述 9 3 车牌识别系统程序设计 11 3.１ 图像读取及车牌区域提取 11 3.１.1图像灰度图转化 11 3.１.2图像的边缘检测 13 3.１.3灰度图腐蚀 14 3.１.4图像平滑处理 15 3.１.5移除小对象 16 3.１.6车牌区域的边界值计算 17 3.２ 字符切割 18 3.２.1字符切割前的图像去噪处理 1