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An appearance-driven method for converting polygon soup building models for 3D geospatial applications

: Chen, Kan; Johan, Henry; Erdt, Marius

Fulltext urn:nbn:de:0011-n-5814130 (1.0 MByte PDF)
MD5 Fingerprint: cee7be9d25e76163094e424010c70dbe
Created on: 18.6.2021

Sourin, A. ; Institute of Electrical and Electronics Engineers -IEEE-; European Association for Computer Graphics -EUROGRAPHICS-:
International Conference on Cyberworlds, CW 2018. Proceedings : Singapore, 3-5 October 2018
Piscataway, NJ: IEEE, 2018
ISBN: 978-1-5386-7315-7
ISBN: 978-1-5386-7316-4
International Conference on Cyberworlds (CW) <2018, Singapore>
Conference Paper, Electronic Publication
Fraunhofer Singapore ()
Lead Topic: Smart City; Research Line: Computer graphics (CG); polygon simplification; 3D city models; geospatial data

Polygon soup building models are fine for visualization purposes such as in games and movies. They, however, are not suitable for 3D geospatial applications which require geometrical analysis, since they lack connectivity information and may contain intersections internally between their parts. In this paper, we propose an appearance-driven method to interactively convert an input polygon soup building model to a two-manifold mesh, which is more suitable for 3D geospatial applications. Since a polygon soup model is not suitable for geometrical analysis, our key idea is to extract and utilize the visual appearance of the input building model for the conversion. We extract the silhouettes and use them to identify the features of the building. We then generate horizontal cross sections based on the locations of the features and then reconstruct the building by connecting two neighbouring cross sections. We propose to integrate various rasterization techniques to facilitate the conversion. Experimental results show the effectiveness of the proposed method.