快速图符匹配方法及其在军标识别中的应用  

A Method for Fast Shape Matching and its Application to Military Mark Recognition

作　　者：李昌华[1] 王东[1] 

机构地区：[1]西安建筑科技大学信息与控制工程学院,西安710055

出　　处：《光子学报》2010年第5期941-944,共4页Acta Photonica Sinica

基　　金：国家自然科学基金(50878176);陕西省自然科学基金(2002F14)资助

摘　　要：为了加快在旋转及缩放情况下基于Hausdorff距离的图符匹配方法的速度,提出了一种基于缩略模型的Hausdorff距离形状匹配方法.该方法分为两个阶段,首先利用模型的稀疏版本在较大的距离阈值下进行粗匹配,然后再利用全模型在稍小的距离阈值和较大的重合率门限进行双阈值精确匹配.利用地图上叠加的图形符号进行了匹配实验.实验结果表明,该方法获得了较低漏检和虚警以及较短的匹配时间,同时该方法已被用于地图中的军标识别,效果良好.In order to speed up the mark matching under the condition of rotating and scaling,a method for shape matching based on sparse model is proposed using Hausdorff distance as the matching distance. This method has two stages： a sparse model is used in rough matching with a large distance threshold; a full model is used in precise matching with dual thresholds which are a moderately small distance threshold and a large coincidence rate threshold. An experiment is conducted, in which marks imposed on a map are tested, and shorter matching time is obtained with low false negative rate and low false positive rate. This method has been successfully used in military mark recognition in maps.

关 键 词：图符识别 HAUSDORFF距离 缩略模型 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]