Computing Size Functions from Edge Maps

  • Authors:
  • Claudio Uras;Alessandro Verri

  • Affiliations:
  • Dipartimento di Fisica, Universitá di Genova, via Dodecaneso, 33, 16146, Genova, Italy;Dipartimento di Fisica, Universitá di Genova, via Dodecaneso, 33, 16146, Genova, Italy

  • Venue:
  • International Journal of Computer Vision
  • Year:
  • 1997

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Abstract

Size functions are integer valued functions of tworeal variables which have been recently proposed for therepresentation and recognition of shape. A main limitation of thetheory of size functions appeared to be the fragility of the producedrepresentation with respect to edge fragmentation. In this paper itis shown that size functions can actually be defined without makingassumptions on the topological structure of the viewedshape. Consequently, size functions can be profitably used even in thepresence of fragmented edge maps. In order to demonstrate thepotential of size functions for computer vision, a system for shaperecognition is described and tested on two different domains. Thevery good performances of the system indicate that size functions areextremely effective for the analysis of shapes for which geometricmodels might be difficult to obtain.