@INPROCEEDINGS{Gottfriedg,
  author = {Gottfried, Bj{\"o}rn},
  title = {Querying for silhouettes by qualitative feature schemes},
  booktitle = {2nd IEEE International Conference on Document Image Analysis for
	Libraries},
  year = {2006},
  address = {Lyon, France},
  month = {April},
  abstract = {Depending on their contents digital libraries require specific means
	for searching in them for objects, especially in the case of pictorial
	objects. In this paper, we devote our attention to those fields in
	which silhouettes of objects or their outlines are of interest, i.e.
	whenever features are particularly distinctive which reside at the
	contour of objects. A set of qualitative features is provided which
	can easily be made in sketches and which can be robustly distinguished
	in a query-by-sketch approach. As those qualitative features can
	be computed separately for each object off-line, objects can be indexed
	with logarithmic time by their qualitative description.},
  owner = {pmania},
  timestamp = {2012.11.06},
  url = {http://www.tzi.de/~bjoerng}
}