The visual hull of smooth curved objects

The visual hull is a geometric entity that relates the shape of an object to its silhouettes or shadows. This paper develops the theory of the visual hull of generic smooth objects. We show that the visual hull can be constructed using surfaces which partition the viewpoint space of the aspect graph...

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Bibliographic Details
Published in:IEEE transactions on pattern analysis and machine intelligence 2004-12, Vol.26 (12), p.1622-1632
Main Authors: Bottino, A., Laurentini, A.
Format: Article
Language:English
Subjects:
aspect
aspect graphs
Computer vision
Data structures
Humans
Image recognition
Image reconstruction
Index Terms- Computer vision
Light sources
Shape
silhouettes
smooth curved objects
Solids
Surface reconstruction
Virtual reality
visual hull
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Summary:The visual hull is a geometric entity that relates the shape of an object to its silhouettes or shadows. This paper develops the theory of the visual hull of generic smooth objects. We show that the visual hull can be constructed using surfaces which partition the viewpoint space of the aspect graph of the object. The surfaces are those generated by the visual events tangent crossing and triple point. An analysis based on the shape of the object at the tangency points of these surfaces allows pruning away many surfaces and patches not relevant to the construction. An algorithm for computing the visual hull is outlined.
ISSN:0162-8828
1939-3539
DOI:10.1109/TPAMI.2004.130