A spatially multiresolution, MRF optimization based approach to the shape from shading problem

Authors:
Markus Louw;Fred Nicolls
Affiliations:
University of Cape Town, South Africa;University of Cape Town, South Africa
Venue:
VIIP '07 The Seventh IASTED International Conference on Visualization, Imaging and Image Processing
Year:
2007

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Abstract

This paper extends the MRF formulation approach [6] for solving the shape from shading problem. Our method uses simulated annealing Gibbs sampling to minimize a lattice energy for an MRF formulation which characterizes the Shape from Shading (SFS) problem under Lambertian reflectance conditions. We explore a spatial multi-resolution approach which refines the digital elevation map of the surface in a coarse to fine manner. This framework allows us to deal with images as projections rather than affine mappings, and allows us to incorporate a local occlusion constraint to cater for more general scene/lighting configurations.