摘要
针对三维激光扫描采集的地面数据存在大量建筑物、草木等遮挡物,导致地面点与非地面点提取效果较差,影响地面水平沉降测量的精度和有效性的问题,通过结合自适应格网算法与渐进三角网加密算法提取地面点,并以此为基础构建TIN网,采用Kriging插值算法进行估计,实现了对地面水平沉降的测量。仿真结果表明,在地面点提取的数量上,相较于规则格网算法,所提方法利用自适应格网算法更具优势,提取的地面点数量更多,所构建的TIN网结构更均匀,同时还增加了陡坎位置;在地面水平沉降值提取上,所提方法采用的Kriging插值法可较为准确地测量地面水平沉降值,相较于IDW算法,所提方法的测量值与原始结果更接近,差距更小,插值精度更高,具有一定的有效性和实用性。
Aiming at the problem that there are a large number of buildings, vegetation and other obstructions in the ground data collected by three-dimensional laser scanning, which leads to the poor extraction effect of ground points and non ground points and affects the accuracy and effectiveness of land horizontal settlement measurement, the ground points are extracted by combining the adaptive grid algorithm and the progressive triangulation encryption algorithm, and the tin network is constructed on this basis, Kriging interpolation algorithm is used for estimation, and the measurement of land horizontal settlement is realized. The simulation results show that compared with the regular grid algorithm, the proposed method has more advantages in the number of ground points extracted, the number of ground points extracted is more, the structure of tin network is more uniform, and the position of scarp is increased;In the extraction of land horizontal settlement value, the Kriging interpolation method used in the proposed method can measure the land horizontal settlement value more accurately. Compared with IDW algorithm, the measured value of the proposed method is closer to the original result, the gap is smaller, the interpolation accuracy is higher, and has certain effectiveness and practicability.
作者
唐桂彬
周波
TANG Guibin;ZHOU Bo(Yangling Vocational&Technical College,Xianyang Shanxi 712100,China)
出处
《自动化与仪器仪表》
2022年第9期66-70,共5页
Automation & Instrumentation
基金
杨凌职业技术学院2021年科技创新项目(ZK21-36)。
关键词
三维激光扫描
地面水平沉降测量
自适应格网算法
渐进三角网加密算法
Kriging插值法
three dimensional laser scanning
land horizontal settlement measurement
adaptive grid algorithm
progressive triangulation encryption algorithm
kriging interpolation
