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ICCV
2001
IEEE

The KGBR Viewpoint-Lighting Ambiguity and its Resolution by Generic Constraints

10 years 8 months ago
The KGBR Viewpoint-Lighting Ambiguity and its Resolution by Generic Constraints
We describe a novel viewpoint-lighting ambiguity which we call the KGBR. This ambiguity assumes orthographic projection or an affine camera, and uses Lambertian reflectance functions including cast/attached shadows and multiple light sources. A KGBR transform alters the geometry (by a three-dimensional affine transformation) and albedo properties of objects. If two objects are related by a KGBR transform then for any viewpoint and lighting of the first object there exists a corresponding viewpoint and lighting of the second object so that the images are identical up to an affine transformation. The Generalized Bas Relief (GBR) ambiguity [1] is obtained as a special case of the KGBR. We describe generic viewpoint and lighting assumptions [5] and show that either, or both, resolve this ambiguity by biasing towards objects with planar geometry. In Proceedings International Conference on Com
Alan L. Yuille, James M. Coughlan, Scott Konishi
Added 15 Oct 2009
Updated 31 Oct 2009
Type Conference
Year 2001
Where ICCV
Authors Alan L. Yuille, James M. Coughlan, Scott Konishi
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