超高层建筑实景三维建模航飞关键技术研究

Key aviation technology of 3D real scene model of super high- rise building

利用倾斜摄影建立实景三维模型已应用于各行各业,但城市密集区域高楼林立、建筑密集、高差较大,建筑之间普遍存在底部纹理数据采集不全的问题,且随着建筑高差的增加,实景三维模型成果出现拉花、空洞和扭曲的现象愈加明显。为了解决超高层建筑实景三维建模存在的上述问题,本文在外业航飞环节提出分层航飞、环绕飞行和地面近景3项航飞关键技术,优化超高层建筑实景三维建模的质量和精度,并选取3个实际场景进行验证。结果表明,根据测区实际情况,结合使用或单独使用这3项关键技术,并辅以补拍等方法,能够提高外业航飞成果质量,保证城市大场景的协调、一致性。

Oblique photography has been applied to all walks of life to establish 3D real scene models.However,there are many densed high-rise buildings,and large height differences among these buildings in the densely populated area,and there exists a general problem of incomplete texture data of the building bottom.Moreover,the pulling,hollow and distortion of 3D real scene model will become more and more obvious with the increase of building height differences.For the problems above,three key technologies of airborne flight,including layered flight,surrounding flight and ground close-up,from the source of field industry flight is proposed in this paper to optimize the quality and accuracy of 3D real scene modeling of super high-rise buildings.The results are verified by three real scenes.The results show that the combined use or single use of these three key technologies,supplemented by supplementary shooting methods can improve the quality of field industry flight results and ensure the coordination and consistency of large urban scenes.