一种无人机影像点云提取海岛自然岸线的方法  

A Natural Island Coastline Extraction Method Based on UAV DSM Data

作　　者：郭忠磊[1] 辛宪会[1] 滕惠忠[1] 黄辰虎[1] 张靓[1] GUO Zhonglei;XIN Xianhui;TENG Huizhong;HUANG Chenhu;ZHANG Liang(Naval Institute of Hydrographic Surveying and Charting,Tianjin 30061,China)

机构地区：[1]海军海洋测绘研究所,天津300061

出　　处：《海洋测绘》2018年第3期35-38,共4页Hydrographic Surveying and Charting

摘　　要：针对从机载激光点云中提取海岸线方法的不足,提出了一种基于无人机影像DSM点云数据,结合潮汐模型提取海岛自然岸线的方法。采用计算机视觉理论与方法处理高分辨率无人机影像,获取高分辨、高精度的DSM点云,并由DSM点云生成DEM;通过等值线追踪法自动提取基于平均大潮高潮面的海岛岸线。实验结果表明:该方法提取的海岛自然岸线精度满足海道测量规范相关要求。Aiming at the shortages of extracting coastline from Li DAR point clouds,a newmethod of using UAV DSMpoint clouds,combining with China offshore tide model is put forward. Firstly,the high resolution UAV images are processed following the computer vision method,and the high resolution and precision DSMpoint clouds are gained,which are used to produce DEM.Then,the coastline based on MHWS is abstracted based on isoline method. It is tested that the technology established in this research is capable of extracting nature coastline,and its accuracy meets the requirements of hydrographic survey specification.

关 键 词：无人机影像 区域网平差 密集匹配 DSM点云 潮汐模型 海岛岸线 

分 类 号：P229.4[天文地球—大地测量学与测量工程]