基于距离变换的曲线弯曲识别方法研究  

Recognition Method of Curve Bend Based on Distance Transformation

作　　者：杨辉[1] 谭树东[2] 吴艳兰[3] 彭会琨 高园园[5] YANG Hui;TAN Shudong;WU Yanlan;PENG Huikun;GAO Yuanyuan(School of Resources and Environmental Sciences,Wuhan University,Wuhan,430079,China;National Marine Data and Information Service,Tianjin 300171,China;School of Resources and Environmental Engineering,Anhui University,Hefei 230601,China;AutoNavi Software Co.,Ltd,Beijing 100080,China;Hei Longjiang Geographic Information Engineering Institute,Harbin 150081,China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430079 [2]国家海洋信息中心,天津300171 [3]安徽大学资源与环境工程学院,安徽合肥230601 [4]高德软件有限公司,北京100080 [5]黑龙江地理信息工程院,黑龙江哈尔滨150081

出　　处：《海洋测绘》2019年第1期31-34,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41271443)

摘　　要：对于曲线形态结构分析和以此为基础的地理分析如曲线综合而言,弯曲识别是一个关键问题。在分析弯曲定义及其特性的基础上,以距离变换为基本运算,对地理曲线进行一系列组合变换即粘连变换,并利用粘连变换所具有的"保凸"、"保平"、"减凹"、且"减凹"程度可控的特性,提出一种曲线弯曲识别新方法。实验表明,该方法能够明确控制与弯曲识别密切相关的三因素:观察角度、观察尺度和观察方向,识别结果符合视觉认知。研究内容对地理曲线结构形态分析以及曲线综合具有一定的参考价值。As a basic structure unit of curve,the recognition of curve bend is a key issue for the analysis of curve shape and the further geographic analysis such as curve generalization.This paper firstly analyzes the definition and characteristics of curve bend.Then it puts forward a new method for curve bend recognition using distance transform and the combined operation(i.e.conglutination transform).The proposed methodology is simple to implement and only requires two settings which control the three factors mentioned above.The experiment shows that the curve bend recognized by the new method appear to be closely consistent with the visual cognition.This paper has certain reference value for the analysis of curve shape and curve generalization.

关 键 词：曲线综合 弯曲识别 距离变换 曲线形态 视觉认知 

分 类 号：P282[天文地球—地图制图学与地理信息工程]