Estimating Cast Shadows using SFS and Class-based Surface Completion

Authors:
William A. P. Smith;Edwin R. Hancock
Affiliations:
University of York,York, YO10 5DD, UK;University of York,York, YO10 5DD, UK
Venue:
ICPR '06 Proceedings of the 18th International Conference on Pattern Recognition - Volume 04
Year:
2006

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Abstract

This paper describes a method for cast shadow removal from obliquely illuminated images of faces. The method draws on a statistical model of surface normal directions. The model is fitted to shadowed facial images using robust statistics and constraints provided by shape-from-shading. Regions associated with poor fit residuals are associated with shadow regions. We illustrate the method on the Yale B database where it gives both good shadow map estimates and fills-in the facial surface in the shadow regions.