面状建筑物多层次骨架线提取方法

A Method of Extracting Multi-Scale Skeleton Lines for Polygon Buildings

由于缺乏对凸部与建筑主体之间的层次关系描述,单个建筑物化简大多采用整体直角化方式进行,缺乏渐进式表达方法,难以实现对建筑物的多尺度、多层次逐步化简控制。针对该问题,提出了一种用于建筑物多层次表达的多层次骨架线构建方法。该方法首先通过构建Delaunay三角网提取建筑物内骨架线段,然后根据骨架线所关联的三角形面积识别得到主骨架线和次级骨架线之间的层级关系;最后对骨架线进行拉直处理。实验表明,该方法能够有效提取建筑物的多层次骨架线,较好地兼顾了建筑物的整体走向与局部形态特征,可为面状建筑物多尺度化简与表达提供支撑。

Due to the lack of description in hierarchical relationships between the convex and main parts of the buildings, current research on simplifying buildings always adopt whole rectangularity approach, which lacks gradual expression and is difficult to achieve multi-scale, multi-level progressive control abilities. Aiming at this problem, a multi-scale skeleton line extracting method for multi-scale expression of buildings was proposed. Firstly, the Delaunay triangulation network was used to extract the skeleton lines in the buildings, and then the hierarchical relationship between the main skeleton lines and the secondary skeleton lines was obtained according to the triangle area associated with the skeleton lines. Finally, the skeleton lines were straightened. Experiments show that the method can effectively extract the multi-scale skeleton lines of the buildings, which better reflects the general trend and local morphological characteristics of the buildings, and can support multi-scale simplification and expression of building polygon features.