Ridge based decomposition of complex buildings for 3D model generation from high resolution digital surface models

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Abstract

3D city models have a wide range of applications such as mobile navigation, urban planning, telecommunication, and tourism. The generation of high resolution Digital Surface Models (DSMs), in particular from airborne LIDAR data have found a major attraction of researchers in this field due to their high accuracy and high density of points. In this paper, a new approach is proposed for the generation of 3D models of buildings that are extracted from a high resolution DSM. Particularly the complex buildings containing several smaller building parts are discussed. The building parts are individually modeled by a projection-based method and merged to form the final 3D model. The following building parts are considered to be modeled in the proposed approach: (1) flat roof, (2) gable roof, (3) hipped roof, and (4) mansard-shaped roof buildings. The complex buildings are decomposed into several parts according to the number of existing ridge lines. The ridge line extraction begins with image reconstruction by geodesic morphology (Arefi and Hahn, 2005) extracting the pixels of the highest part of the building segment, i.e., local maxima. Next, a Random SAmple Consensus (RANSAC) (Hartley and Zisserman, 2004) based technique is used to fit straight lines to the ridge points. The pixels of the building part regarding to each ridge line are projected onto a plane which is defined based on ridge direction. According to the type of the roof, a 2D model is fitted to the projected points. The 2D model is converted back to 3D by extruding it orthogonally to the projection plane. After reconstructing 3D models for all building parts, they are merged to form the overall 3D model of the building.

Available Versions of this Item

• Ridge based decomposition of complex buildings for 3D model generation from high resolution digital surface models. (deposited 27 Oct 2010 14:16)
  • Ridge based decomposition of complex buildings for 3D model generation from high resolution digital surface models. (deposited 01 Dec 2011 15:33) [Currently Displayed]