多源LiDAR和UAV影像的塔式建筑物三维建模方法

塔式建筑物由于立面结构复杂,使用单一数据源进行三维建模时容易出现部分区域空洞、纹理拉花等情况。为解决此问题,本文提出一种将无人机(Unmanned Aerial Vehicle,UAV)影像、机载LiDAR数据和手持LiDAR数据进行配准融合的塔式建筑物三维建模方法。以云南省玉溪市新平县的五彩云楼为例,使用UAV和手持激光扫描仪作为数据采集设备,首先分别采集塔式建筑物的UAV影像、机载LiDAR和手持LiDAR数据,然后基于摄影测量原理生成UAV影像的点云,其次基于最近点迭代算法方法将三种数据进行配准融合,最后通过构建不规则三角网表示其三维模型。实验结果表明:将多源LiDAR和UAV影像点云配准融合后生成的三维模型结构更加完整,避免了单一数据源构建三维模型存在的空洞问题。

3D Modeling approach for tower buildings using multi source LiDAR and UAV imagery

Given the intricate design of tower facades,generating 3D models from a single data source often results in regional voids and exaggerated textural details.To address these issues,this paper proposes a 3D modeling method for tower buildings by integrating and synthesizing data from Unmanned Aerial Vehicles (UAV),airborne LiDAR,and handheld LiDAR.Illustrated by the case study of the vibrant Wucailou building in Xinping County,Yuxi City,Yunnan Province,data acquisition is conducted using UAVs and handheld laser scanners.Initially,separate collections of UAV imagery,airborne LiDAR,and handheld LiDAR data for the tower are undertaken.Subsequently,UAV image point clouds are generated adhering to photogrammetric principles.And then the three kinds of data are fused with alignment based on the nearest point iteration algorithm method,and finally,the three kinds of data are fused with alignment by constructing a irregular triangular mesh to represent its 3D model.The experimental results validate that the 3D model derived from the harmonized multi source LiDAR and UAV image data is more complete,which avoids the problem of voids that exists in the construction of 3D models from a single data source.