| The results of three-dimensional reconstruction of large-scale scenes have wide applica-tion prospects in the fields of land and resources management,power system maintenance,urban construction,cultural relics protection,environmental protection monitoring,emer-gency command,disaster assessment and so on.In this paper,for large-scale scenes,UAV tilt photography is used to obtain the data and carry out three-dimensional reconstruction.The main research contents are three parts:(1)The automatic planning algorithm of the unmanned aerial vehicle(UAVs)is as follows:in the planning of the cruise route of the unmanned aerial vehicle,the flight speed of the unmanned aerial vehicle is fast,the large turning radius of the unmanned aerial vehicle and the unique shape outline of the mapping area can lead to the poor effect of the existing unmanned aerial vehicle path automatic planning algorithm,In order to solve the problem of low measurement efficiency,it is necessary to automatically plan the path of the unmanned aerial vehicle under the above-mentioned constraints.(2)Three-dimensional high-precision reconstruction techniques and methods of terrain and geomorphology based on aerial photography:this paper mainly studies the feature extrac-tion technology,feature matching model and 3D model reconstruction method based on photographic geometry,and combines real-time differential GNSS data.The reconstruc-tion process from continuous aerial image to 3D model is realized by IMU data and ground control point data.(3)Three-dimensional high-precision reconstruction techniques and methods of shallow wa-ter topography based on aerial photography:the light refraction model of shallow water aeri-al photography and the three-dimensional reconstruction error model under different water surface angles are studied in this paper.An effective 3-D high-precision reconstruction mod-el and error control method for shallow water terrain around it based on aerial photography is presented in this paper. |
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