Finding picture edges through collinearity of feature points

Authors:
F. O'Gorman;M. B. Clowes
Affiliations:
Laboratory of Experimental Psychology, University of Sussex, Brighton, Sussex, England;Laboratory of Experimental Psychology, University of Sussex, Brighton, Sussex, England
Venue:
IJCAI'73 Proceedings of the 3rd international joint conference on Artificial intelligence
Year:
1973

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Abstract

The recovery of straight picture edges from digitisations of scenes containing polyhedra ('line finding') is central to the functioning of scene analysis programs. While recognising that recovery properly involves a computational mobilisation of a great deal of knowledge-supported context, there remain some "basic issues of representation which govern the way in which the primary data - grey levels - are addressed. The paper describes a parametric representation of straight picture edges and its procedural deployment in the recovery of edges from digitisations of scenes whose contents arc essentially polyhedra with strong visible shadows.