基于数字摄影测量的城市建筑三维快速建模方法

数字城市的基础地理数据库正在由传统的二维形式向三维形式转变,建设城市三维模型已成为数字城市工程的重要基础工作。作为城市三维模型的核心构成部分,建筑模型的数量巨大,生产成本高。数字摄影测量技术为建筑矢量数据的采集提供了有效途径,但要进一步缩减三维建模的工作量,需要对基于矢量线条的建筑结构识别、建筑体面构造以及各种复杂建筑构型等方法和算法进行研究,并开发辅助人工的建筑三维建模软件系统。该文以数字城市测量提取的建筑结构线为基础,对计算机三维建模中涉及的关键算法进行研究,提出了一种城市建筑三维快速建模的方法。

Three Dimensional Modeling Method of Urban Buildings Based on Digital Photogrammetry

Basic geographic database of digital city is changing from traditional two-dimensional form to three-dimensional form. Establishment of 3D model is an important basic work in urban construction. As the core part of 3D model, the quantity of building model is huge, and the production cost is high. Digital photogrammetry technology provides an effective way for collecting building vector datas. In order to reduce the workload of 3D modeling furtherly, structural identification, vector lines of building structures and decent buildings with complex configuration method and algorithm based on the auxiliary building and the development of 3D modeling software system manual should be studied. In this paper, based on the building line of digital city survey, the key algorithms involved in 3D modeling have been studied.