Modélisation 3D de bâtiments : reconstruction automatique de superstructures de toits et recalage cinétique de toits polyédriques prenant en compte la topologie

Abstract : There is nowadays a growing demand for increasingly more accurate 3D city models. Whereas recent works have lead to the robust generation of polyhedral building models, they do not model roof superstructures such as chimneys or dormer windows, and may feature large geometric and topological errors. We propose an approach to refine geometrically and semantically a superstructure-less approximate building model, using a Digital Surface Model (DSM). This iterative approach alternates between superstructure reconstructions and geometric fitting of the main roof planes. Superstructure detection and reconstruction are based on a library of parametric superstructure models. A set of disjoint superstructures is searched to explain the height differences between the DSM and the building model, reducing the search to a maximum weighted clique problem. The fitting step uses the previously detected superstructures to refine the main roof plane estimations. It corrects both geometric simplifications such as an erroneous roof symmetry, and topological simplifications such as the merging of close vertices of the polyhedral building model. The proposed representation of the building geometry uses the planes supporting each polyhedral facet, which is more intuitive in this context than the usual representation using the vertex locations. We introduce the trihedralization problem of splitting vertices that become over-constrained after updating their adjacent facet supports into well-defined vertices at the intersection of 3 planes. We propose a novel kinetic data structure that prevents facet self-intersections throughout the iterative reestimation of their supporting planes.
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https://pastel.archives-ouvertes.fr/pastel-00006232
Contributor : Ecole Télécom Paristech <>
Submitted on : Friday, August 6, 2010 - 8:00:00 AM
Last modification on : Wednesday, February 20, 2019 - 2:41:11 PM
Long-term archiving on : Thursday, March 30, 2017 - 5:58:43 AM

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  • HAL Id : pastel-00006232, version 1

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Mathieu Brédif. Modélisation 3D de bâtiments : reconstruction automatique de superstructures de toits et recalage cinétique de toits polyédriques prenant en compte la topologie. Traitement du signal et de l'image [eess.SP]. Télécom ParisTech, 2010. Français. ⟨pastel-00006232⟩

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