一种提取山脊线和山谷线的新方法  

A New Method to Extract Terrain Feature Lines

作　　者：熊汉江[1] 李秀娟[1] 

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079

出　　处：《武汉大学学报（信息科学版）》2015年第4期498-502,515,共6页Geomatics and Information Science of Wuhan University

基　　金：国家863计划资助项目(2013AA12A203;2012AA12A405);深圳市战略性新兴产业发展专项资助项目(ZDSY20120618163343353)~~

摘　　要：提出了一种提取山脊线和山谷线的新方法。基于矢量等高线,以Mean Shift思路为全局步骤,以多因素流水模型为局部追踪依据,在提取特征点的同时完成山脊线、山谷线追踪。首先建立等高线间的拓扑关系,确立追踪起点;然后分割等高线弯曲,并依此建立虚拟扇形区域;最后,建立多因素流水模型,根据"流向最大概率"原则,追踪山脊、山谷线。实验结果表明,该方法能更加准确地提取地形特征点,增强抗噪性,并在特征点提取的同时完成山脊、山谷线的连接,大大减少运算量。In this paper,a new method for the extraction of ridge and valley lines is presented.It takes advantages of mean-shift and multifactorial Falling Water Model.The method consists of three principal steps：1）By building the topology relationship between contours,the start points for tracing can be abstracted from them.2）Based on the relationship between contour bendings and terrain feature lines,terrain points are divided into convexes and concaves.At the same time,virtual fan-shaped areas are built.3）According to Falling Water Model and Maximum Probability Flows,ridge lines and valley lines are extracted.The experimental results presented demonstrate that the feature points can be well extracted and the noises and matching errors can be reduced.

关 键 词：Mean SHIFT 山脊线 山谷线 地形特征线 地形分析 流水分析 

分 类 号：P231.5[天文地球—摄影测量与遥感] P208[天文地球—测绘科学与技术]