Weak lighting functions and strong 26-surfaces

  • Authors:
  • R. Ayala;E. Domínguez;A. R. Francés;A. Quintero

  • Affiliations:
  • Univ. de Sevilla, Sevilla, Spain;Univ. de Zaragoza, Zaragoza, Spain;Univ. de Zaragoza, Zaragoza, Spain;Univ. de Sevilla, Sevilla, Spain

  • Venue:
  • Theoretical Computer Science
  • Year:
  • 2002

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Abstract

The goal of this paper is to introduce the notion of weak lighting function in order to replicate the "continuous perception" associated with strong 26-surfaces. As a consequence, the continuous analogue defined ad hoc by Malgouyres and Bertrand only for these surfaces is extended for arbitrary objects, and the local characterization of finite strong 26-surfaces given in (Malgouyres and Bertrand, Int. J. Pattern Recognition Art. Intell. 13(4) (1999) 465-484) is generalized to possibly infinite surfaces. Moreover, weak lighting functions also replicate the "continuous perception" associated with (,)-surfaces, (,)(6,6), since they are generalizing the lighting functions previously defined by the authors.