Generating Straight Outlines of 2D Point Sets and Holes using Dominant Directions or Orthogonal Projections

Melanie Pohl, Dirk Feldmann

2016

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.

Paper Citation

in Harvard Style

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

in Bibtex Style

@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},
}

in EndNote Style

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