期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2008
卷号：XXXVII Part B3a
页码：209-214
出版社：Copernicus Publications
摘要：Road junctions are important components of a road network. However, they are usually not explicitly modelled in existing road extraction approaches. In this paper, we consider road junctions as area objects with possible existence of islands in their central area and propose a level set approach for the automatic extraction of islands. A region-based method is employed to initialize the level set function. The junction outline is provided to focus the attention on a specific area and some constraints are introduced to distinguish islands from other features such as cars. The approach was tested using aerial images of 0.1 m ground resolution taken from suburban and rural areas. Test results are presented and discussed in this paper
关键词：Road junction; Island; Level set; High resolution; Aerial image
