摘要
甘肃天水罗玉沟是典型的黄土沟壑切沟地形,具有坡度变化剧烈、低矮植被覆盖程度高的特点。在本文中,利用Leica HDS6100型三维激光扫描仪对切沟进行初始扫描并存储点云数据,扫描精度为1mm,包含激光脚点个数为1498191,回光强度取值范围为-2048～2047,覆盖面积为14.0975m2,点云平均密度为3345.1个/m2;针对采集到的噪声点比例较大的黄土沟壑切沟点云数据,提出中值滤波、回光强度滤波、RGB滤波融合的滤波方法,利用Cyclone6.0、Matlab R2008a、Arcgis10.0等后续处理软件,较为有效地实现了去除噪声点、保留地面信息的拼接、平滑、去噪、简化方法;对预处理后的点云数据进行克里金和反距离权重两种方法的插值,建立DEM。
Luoyugou,Gansu Province,is a gul y region of loess plateau with uneven terrain and high vegetation coverage.This paper uses the Leica HDS6100 to scan and col ect the Point Cloud of Luoyugou,the scanning accuracy is 1mm,the number of points is 1498191,the return light intensity is between-2048 and 2047,the covered area is 14.0975. Through processing with the software such as Cyclone 6.0,Matlab R2008a,Arcgis 10.0,this paper proposes a efficient method of point cloud data with multi-noises to denoising and mosaic.This paper model the luoyugou DEM with kriging interpolation method and Inverse Distance Weighted Method,and compare the DEM’s accuracy from two methods.
出处
《电子世界》
2013年第15期1-3,共3页
Electronics World
基金
国家自然科学基金"黄土丘陵区切沟侵蚀过程的三维数值模拟研究"(编号:41171224)
关键词
黄土沟壑区
点云
滤波
内插
DEM
gully re,on of loess plateau
point cloud
filtering
interpolation
DEM
