基于空地链影像的空地一体联合空三方法  

A Method of Air-Ground Integrated Aerotriangulation Based on Air-Ground Link Photography

作　　者：王刚[1,2] 刘会云 肖建能 鲁路平 WANG Gang;LIU Huiyun;XIAO Jianneng;LU Luping(Surveying and Mapping Institute Lands and Resources Department of Guangdong Province,Guangzhou 510500;Key Laboratory of Natural Resources Monitoring in Tropical and Subtropical Area of South China,Ministry of Natural Resources,Guangzhou 510663,China;Collaborative Innovation Center of Geospatial Technology,Wuhan University,Wuhan 430079,China)

机构地区：[1]广东省国土资源测绘院,广东广州510663 [2]自然资源部华南热带亚热带自然资源监测重点实验室,广东广州510663 [3]武汉大学地球空间信息技术协同创新中心,湖北武汉430079

出　　处：《测绘地理信息》2024年第6期76-81,共6页Journal of Geomatics

基　　金：广东省自然资源厅科技项目(GDZRZYKJ2022004)

摘　　要：在无人机低空倾斜摄影三维重建中,由于纯空中视角拍摄的影像无法观测到所有区域,导致近地面范围的模型会存在模糊和拉花的现象,影响模型在实际生产生活中的应用。为了改善模型的几何和纹理质量,本文提出了一种具有可操作性的空地一体联合三维重建方案。该方案的特点表现在两个环节:(1)在数据采集环节,除常规低空倾斜摄影外,增加了地面人工摄影和空地链摄影;(2)在数据处理环节,针对地面人工影像采集的现状,如采集时间长、易出现返工补拍的问题,开发了接力式空三作业模式来改善这些问题。该方案实现了空中影像和地面影像的联合空三和整体平差,空地一体联合空三重建的模型比使用纯空中视角影像重建的模型效果有显著提升,对三维重建技术有非常重要的参考价值。As the images taken from the pure aerial view cannot cover all regions,the model near the ground will be blurred and stretched in the 3D reconstruction of unmanned aerial vehicle low-altitude oblique photogrammetry,as the images taken from the pure aerial view cannot cover all regions,the model near the ground will be blurred and stretched,which affects the applications of the model in actual production process.To improve the geometry and texture quality of the model,we propose an air-ground integrated 3D reconstruction scheme with operability.The characteristics of the scheme are manifested in two processes.First,during the data collection process,in addition to conventional low-altitude oblique photography,manual ground photography and airground link photography are also added.Second,in the data processing process,the relay aerotriangulation workflow has been developed to solve the problems encountered during ground image acquisition,such as the long acquisition time and the rework and re-shooting problems.This scheme realizes the joint aerotriangulation and overall bundle adjustment of aerial images and ground images.The model reconstructed by air-ground integrated aerotriangulation is significantly better than that reconstructed by using pure aerial view images,which will be of great reference value to 3D reconstruction technology.

关 键 词：空中三角测量 三维重建 倾斜摄影 空地一体 空地链摄影 

分 类 号：P231.4[天文地球—摄影测量与遥感]