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《Remote Sensing Technology and Application》 2018-01
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Water Regions Extraction from LiDAR Data in Coast

Liang Qianqian;Zhang Hande;Sun Genyun;Wang Peng;College of Geo-resources and Information,China University of Petroleum (East China);Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology;Air-Borne Detachment of China Marine Surveillance;  
Water regions extraction is of great significance to monitoring,research,planning and development of coastal zones.The conventional method of water regions extraction based on remote sensing image often has poor accuracy in coast because there are large differences among spectral character of different water regions which often change over time as well.To solve this problem,the elevation,intensity and point-density information from the highly accurate 3 D mass points of airborne LiDAR was exploited to extract water regions.Firstly,apart of water points were extracted by the characteristics of low density,and then were constrained by the elevation and intensity threshold which came from Statistical table.Secondly,A triangulation network surface model was established based on the water points got from the previous step to describe the elevation trend of water surface.Lastly,all the points which near or behind the surface model was extracted as water points.The result of the accuracy evaluation indicates that the recogniton accuracy of water points is more than 91%.
【Fund】: 海洋公益性课题“机载多维探测系统在海监执法中的应用示范”(201305025)
【CateGory Index】: TP751
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