Darboux smoothing for shape-from-shading

Authors:
Hossein Ragheb;Edwin R. Hancock
Affiliations:
Department of Computer Science, University of York, York YO1 5DD, UK;Department of Computer Science, University of York, York YO1 5DD, UK
Venue:
Pattern Recognition Letters
Year:
2003

Citing 10
Cited 5

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Shape from Shading Using Probability Functions and Belief Propagation

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Testing new variants of the Beckmann-Kirchhoff model against radiance data

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Surface radiance correction for shape from shading

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Abstract

This paper describes a new surface normal smoothing process which can be used in conjunction with shape-from-shading. Rather than directly smoothing the surface normal vectors, we exert control over their directions by smoothing the field of principal curvature vectors. To do this we develop a topography sensitive smoothing process which overcomes the problems of singularities in the field of principal curvature directions at the locations of umbilics and saddles. The method is evaluated on both synthetic and real-world images.