Work on photometric stereo has shown how to recover the shape and reflectance properties of an object using multiple images taken with a fixed viewpoint and variable lighting conditions. This work has primarily relied on the presence of a single point source of light in each image. The authors show how to perform photometric stereo, assuming that all lights in a scene are isotropic and distant from the object but otherwise unconstrained. Lighting in each image may be an unknown and arbitrary combination of diffuse, point and extended sources. Our work is based on recent results showing that for Lambertian objects, general lighting conditions can be represented using low order spherical harmonics. Using this representation, we can recover shape by performing a simple optimization in a low-dimensional space. We also analyze the shape ambiguities that arise in such a representation.
Photometric stereo with general, unknown lighting
01.01.2001
890099 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Photometric Stereo with General, Unknown Lighting
British Library Conference Proceedings | 2001
|Photometric Stereo with General, Unknown Lighting
British Library Online Contents | 2007
|The 4-Source Photometric Stereo Under General Unknown Lighting
British Library Conference Proceedings | 2006
|Near-lighting Photometric Stereo for unknown scene distance and medium attenuation
British Library Online Contents | 2017
|Unambigous Determination of Shape from Photometric Stereo with Unknown Light Sources
British Library Conference Proceedings | 2001
|