[II-83] STUDY ON COMPARATIVE INVESTIGATE OF PHOTOGRAPHING TECHNIQUE AND ESTIMATION OF TREE HEIGHT USING UAV PHOTOGRAMMETRY FOR GRASPING TOPOGRAPHY ON SMALL-SCALE RIVER
Keywords:UAV photogrammetry, river maintenance management, small-scale river, cross survey, river topography, Structure from Motion
In small-scale rivers, evaluation of the flow capacity of rivers is required for grasping flood safety. However, it is in a difficult situation to grasp the flow capacity of river from financial circumstances.
In this study, it carries out under different imaging conditions using UAV photogrammetry, and tree height estimation comparison result and 3D point cloud for each imaging method We examined the effectiveness of.
From the result, it was confirmed that the number of 3D point clouds generated differs by adding oblique photographs and using still images.Moreover, it was confirmed that estimation of tree height using the obtained three-dimensional point group is also effective.
In this study, it carries out under different imaging conditions using UAV photogrammetry, and tree height estimation comparison result and 3D point cloud for each imaging method We examined the effectiveness of.
From the result, it was confirmed that the number of 3D point clouds generated differs by adding oblique photographs and using still images.Moreover, it was confirmed that estimation of tree height using the obtained three-dimensional point group is also effective.
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