一种基岩海(岛)岸线自动提取新方法  

One new method of bedrock( island) coastline extraction

作　　者：沈蔚[1,2] 王家为[1] 王林振 朱瑞芳[1] 朱卫东[1] 栾奎峰[1] 杨龙[3] 

机构地区：[1]上海海洋大学海洋科学学院,上海201306 [2]海岛(礁)测绘技术国家测绘地理信息局重点实验室,山东青岛266510 [3]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《上海海洋大学学报》2015年第6期975-981,共7页Journal of Shanghai Ocean University

基　　金：上海市教育委员会科研创新项目(12ZZ159);中科院空间光电技术重点实验室开放基金(2013051)

摘　　要：利用遥感手段快速准确地提取海岸线,是目前海洋科学研究、地形图测绘、海道测量、海岸带与海岛调查等工作的重要内容。本文以基岩海(岛)岸线为研究对象,在对机载LiDAR点云数据的存储格式、处理流程进行了分析后,基于平均大潮高潮面和激光反射强度,利用TerraSolid软件过滤LAS格式的LiDAR数据,初步获得海岛点云,随后引入Alpha Shapes模型算法自动提取海岛岸线并同步实现了噪音点的剔除。经与高分辨率卫星影像叠加对比分析,本文方法提取的海岛岸线平面精度较高,且具有良好的自适应性、速度快、稳定性高等特点,非常适合基岩海(岛)岸线提取与绘制。Fast accurately coastline extraction using remote sensing method, is one of the important content for marine science research, topographic map surveying, hydrographic and coast ＆ island investigation. LiDAR is becoming one of the most effective remote sensing approach, which could provide 3 D surface data of coast and island with high accuracy and speed. First the LAS format of LiDAR data and the data processing flow are analyzed. Based on the average high tide level and the reflection intensity, the LiDAR points cloud data are filtered. Then, the Alpha Shapes algorithm is used in further filtering of the points data and the automatical extracting of the island coastline. The comparison with the high resolution image （0.5m）proves the Alpha Shapes algorithm is precision, effective and suitable for automatically coastline extracting based on LiDAR data.

关 键 词：机载激光雷达 ALPHA SHAPES 海(岛)岸线 提取算法 

分 类 号：TP701[自动化与计算机技术—检测技术与自动化装置]