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A viscosity solution method for Shape-From-Shading without image boundary data

Published online by Cambridge University Press:  21 June 2006

Emmanuel Prados ,
Fabio Camilli  and
Olivier Faugeras
Emmanuel Prados
Affiliation:
Perception Team, INRIA Rhône-Alpes, France. Emmanuel.Prados@inrialpes.fr
Fabio Camilli
Affiliation:
Dipartimento di Matematica Pura e Applicata, Università dell'Aquila, Italy. camilli@ing.univaq.it
Olivier Faugeras
Affiliation:
Odyssée Lab., INRIA Sophia Antipolis, France. Olivier.Faugeras@sophia.inria.fr
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Abstract

In this paper we propose a solution of the Lambertian shape-from-shading (SFS) problem by designing a new mathematical framework based on the notion of viscosity solution. The power of our approach is twofolds: (1) it defines a notion of weak solutions (in the viscosity sense) which does not necessarily require boundary data. Moreover, it allows to characterize the viscosity solutions by their “minimums”; and (2) it unifies the works of [Rouy and Tourin, SIAM J. Numer. Anal.29 (1992) 867–884], [Lions et al., Numer. Math.64 (1993) 323–353], [Falcone and Sagona, Lect. Notes Math.1310 (1997) 596–603], [Prados et al., Proc. 7th Eur. Conf. Computer Vision2351 (2002) 790–804; Prados and Faugeras, IEEE Comput. Soc. Press2 (2003) 826–831], based on the notion of viscosity solutions and the work of [Dupuis and Oliensis, Ann. Appl. Probab.4 (1994) 287–346] dealing with classical solutions.

Keywords

Shape-from-shadingboundary dataunification of SFS theoriessingular viscosity solutionsstates constraints.
Type
Research Article
Information
ESAIM: Mathematical Modelling and Numerical Analysis , Volume 40 , Issue 2 , March 2006 , pp. 393 - 412
Copyright
© EDP Sciences, SMAI, 2006

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