3D city model construction based on a consumer-grade UAV
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摘要: 城市三维建模是"智慧城市"建设的关键技术之一.为解决传统城市建模方法存在的数据采集难度大、成本高、建模效率低等问题,提出了一种基于消费者级无人机倾斜摄影技术的城市三维建模方法.首先,利用云台控制无人机镜头方向来获取研究区的正射及倾斜影像;然后,利用空中三角测量生成的三维点云构建三维模型,并将从多视影像中提取的建筑物墙面纹理映射到相应的模型;最终,以中国地质大学(武汉)校园为例建立城市真三维模型.结果表明,该方法在满足模型精度要求的同时,大大提高了建模效率,降低了模型生产成本.Abstract: 3D modeling of urban buildings is one of the key technologies for smart city construction. The traditional modeling methods have many disadvantages in the process of data collection,such as operating difficulty,high cost and low efficiency in 3D modeling. In this paper, the authors propose a 3D city modeling approach based on oblique photography technology of unmanned aerial vehicle(UAV) for consumption. The cradle is used to control the direction of lens, and multi-angle slanted images are obtained. Then the 3D model is constructed by using aerial triangulation principle, and textures of building walls are extracted from multi -angle images. Finally the texture is mapped to the corresponding models,and the true 3D model is built. Result shows that the approach can not only improve modeling efficiency but also reduce the cost during data producing process.
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Key words:
- consumer-grade UAV /
- oblique photogrammetry /
- 3D model
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