倾斜摄影三维模型实体提取和动态表达的技术研究

Research on the entity extraction and dynamic expression technologies based on oblique photography 3D model

倾斜摄影三维模型能够真实地反映地物的外观、位置、高度等属性,并使数据具备精确的地理信息,增强了数据的三维真实感。针对倾斜摄影测量技术生成的三维模型"一张皮"特点,破解数据的应用短板,文章基于倾斜摄影模型数据处理和在线可视化技术,在实体提取和动态表达两个层次展开技术方法研究。在实体提取方面,结合既有的矢量线划数据,实现实体模型自动化物理分割技术;在动态表达方面,利用倾斜模型多细节层次和矢量切片按需加载,实现场景的动态单体化表达技术,为倾斜摄影成果的应用提供新方法和思路。

The oblique photography 3D model can truly reflect such features as appearance,location and height of things on land,and provides accurate geographic information,which enhances 3D realism.In light of the feature of"a piece of skin"of 3D model generated by oblique photography surveying technology and in order to overcoming the shortcoming of data application,this paper studies the methods of entity extraction and dynamic expression based on the data processing of oblique photography model and online visualization technology.For entity extraction,the physical segmentation technology of entity model automation is realized using the existing vector line division data.For dynamic expression,the dynamic monomeric expression technology of scene is realized by using multi-detail level of oblique model and vector slice loading,which provides a new method and idea for the application of oblique photography.