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Authors: Melanie Pohl and Dirk Feldmann

Affiliation: Fraunhofer IOSB, Germany

ISBN: 978-989-758-175-5

Keyword(s): Point Set, Outline, Boundary, Hull, Concave, Building, Footprint, Dominant Direction, Preference Angles.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Fundamental Methods and Algorithms ; Geometric Computing ; Geometry and Modeling ; Modeling and Algorithms ; Scene and Object Modeling

Abstract: Representing the shape of finite point sets in 2D by simple polygons becomes a challenge if the resulting outline needs to be non-convex and straight with only few, distinct edges and angles. Such outlines are usually sought in order to border point sets that originate from man-made objects, e.g., for the purpose of building reconstruction from LIDAR data. Algorithms for computing hulls of point sets obtained from such structures usually yield polygons having too many edges and angles and may thus not capture the actual shape very well. Furthermore, many existing approaches cannot handle empty domains within the boundaries of a point set (holes). In this paper, we present methods that create straight, non-convex outlines of finite 2D point sets and of possibly contained holes. The resulting polygons feature fewer vertices and angles than hulls and can thus faithfully represent objects of angular shapes.

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Paper citation in several formats:
Pohl M. and Feldmann D. (2016). Generating Straight Outlines of 2D Point Sets and Holes using Dominant Directions or Orthogonal Projections.In Proceedings of the 11th Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2016) ISBN 978-989-758-175-5, pages 59-71. DOI: 10.5220/0005720300570069

@conference{grapp16,
author={Melanie Pohl and Dirk Feldmann},
title={Generating Straight Outlines of 2D Point Sets and Holes using Dominant Directions or Orthogonal Projections},
booktitle={Proceedings of the 11th Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2016)},
year={2016},
pages={59-71},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005720300570069},
isbn={978-989-758-175-5},
}

TY - CONF

JO - Proceedings of the 11th Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 1: GRAPP, (VISIGRAPP 2016)
TI - Generating Straight Outlines of 2D Point Sets and Holes using Dominant Directions or Orthogonal Projections
SN - 978-989-758-175-5
AU - Pohl M.
AU - Feldmann D.
PY - 2016
SP - 59
EP - 71
DO - 10.5220/0005720300570069

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