A Method of Air-Ground Integrated Aerotriangulation Based on Air-Ground Link Photography
As the images taken from the pure aerial view can-not 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 im-ages 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 reconstruc-tion scheme with operability.The characteristics of the scheme are manifested in two processes.First,during the da-ta collection process,in addition to conventional low-altitude oblique photography,manual ground photography and air-ground 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 realiz-es 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.
aerotriangulation3D reconstructionoblique photogrammetryair-ground integrationair-ground link pho-tography
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