利用加权整体最小二乘DSM提取DEM的方法
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摘要
随着无人机航摄软硬件技术的快速发展,通过倾斜摄影三维建模快速获取DSM的成本越来越低。在小比例尺的地形图测量中,DSM若能通过快速处理得到较为精确的DEM,即可节省大量的人力物力。针对林地范围内DSM数据的特点,采用加权整体最小二乘法对DEM进行提取。
The cost of quickly acquiring DSM through oblique photography 3D modeling is getting lower and lower with the rapid development of aerial photogrammetry software and hardware technology for UAV. It will save a lot of manpower and resources if the DSM is able to get a more accurate DEM by fast processing in a small scale topographic survey. In view of the characteristics of DSM data in forest, we used the weighted total least squares method to extract DEM.
The cost of quickly acquiring DSM through oblique photography 3D modeling is getting lower and lower with the rapid development of aerial photogrammetry software and hardware technology for UAV. It will save a lot of manpower and resources if the DSM is able to get a more accurate DEM by fast processing in a small scale topographic survey. In view of the characteristics of DSM data in forest, we used the weighted total least squares method to extract DEM.
引文
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[2]刘成皓.SAR图像港口目标检测研究[D].南京:南京航空航天大学,2012
[3]倪慧.移动最小二乘数据拟合中的若干问题研究[D].杭州:浙江理工大学,2010:2-3
[4]Lancaster P,Salksuskas K.Surfaces Generated by Moving Least Squares Methods[J].Mathematics of Computation,1981(155):141-158
[5]蒋荣华,刘超.一种三维激光扫描点云拟合的抗差加权整体最小二乘法[J].测绘通报,2017(9):37-41
[6]官云兰,刘绍堂,周世健,等.基于整体最小二乘的稳健点云数据平面拟合[J].大地测量与地球动力学,2011,31(5):80-83
[7]简浩.顾及起算数据误差的整体最小二乘法及软件研制[D].成都:西南交通大学,2012