基于机载视频量测的3维城市建模

3维城市模型的快速获取及更新是近十年来计算机视觉及数字摄影测量领域研究的热点。从实用、经济的角度出发，提出了集成城市数字地图、LIDAR data以及机载视频序列影像多数据源，基于数字摄影测量理论的半自动获取3维城市模型的解决办法，并在3维导航的数据生产实践中进行了验证，取得较好的生产效率及效果。

3D City Modeling Based on Videogrammetry from Helicopter

Interest in 3D city Modeling and quickly updating have significantly raised in the past years.In this paper,an economically viable solution for city modeling based on strict digital photogrammetric theory is proposed.Two oblique image sequences for buildings' walls and one vertical image sequence for building's roof,acquired by digital video camera on helicopter,coarse 2D vector data of buildings and LIDAR data are used as sources of information.Camera parameters of each image are acquired by automatic aerial triangulation technique for high overlapping image sequence.By matching every space edge of the building to its image line,the building is accurately reconstructed.The visualization of 3D city model is realized based on the reconstructed buildings with fine textures superimposed on DSM and ortho-image.Experimental results in three-dimensional car navigation application show us an attractive future both in efficiency and expression.