Bischof, W. F. and Ferraro, M. (1988). Curved Mondrians: A generalized approach to shape from shading. Proceedings of the Canadian Artificial Intelligence Conference, Edmonton, Canada, pp. 199-205.
Most shape-from-shading methods assume that surface reflectance is constant within large image regions. This assumption is violated in natural scenes with objects made from different materials. We present a more general method for recovering shape from shading, assuming that surfaces are smooth and albedo is piecewise constant, as would be the case if a Mondrian image was painted on a smooth curved surface. Our method is based on combining Brooks and Horn's method for shape recovery with the recovery of albedo using stochastic relaxation.
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