@INPROCEEDINGS{Gottfriedf,
  author = {Gottfried, Bj{\"o}rn},
  title = {{Global Feature Schemes for Qualitative Shape Descriptions}},
  booktitle = {IJCAI 05 WS Spatial-Temporal Reasoning},
  year = {2005},
  editor = {Ligozat, G. and Guesgen, H. W. and Freksa, Christian},
  note = {To appear},
  abstract = {Qualitative shape descriptions are important in a number of fields
	in AI, such as in qualitative reasoning, and especially in robotics
	and vision. Current approaches are confined to describing local features
	while walking along the shapes' boundaries. Shapes exist, however,
	which cannot be distinguished by these methods even though there
	are obvious distinctions between them. We shall introduce the notion
	of a global feature scheme in order to compensate for the shortcomings
	of present techniques. This approach is then applied to a class of
	shapes which have previously been shown to be difficult to distinguish,
	and proves capable of telling them apart. The method is based on
	a representation of intersection-free relations which complements
	existing qualitative representations for which intersections are
	virtually fundamental.},
  owner = {pmania},
  timestamp = {2012.11.06},
  url = {http://www.tzi.de/~bjoerng/Gottfried2005a.pdf}
}