Reduced depth and visual hulls of complex 3D scenes

Alexander Bogomjakov, Craig Gotsman

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations


Depth and visual hulls are useful for quick reconstruction and rendering of a 3D object based on a number of reference views. However, for many scenes, especially multi-object, these hulls may contain significant artifacts known as phantom geometry. In depth hulls the phantom geometry appears behind the scene objects in regions occluded from all the reference views. In visual hulls the phantom geometry may also appear in front of the objects because there is not enough information to unambiguously imply the object positions. In this work we identify which parts of the depth and visual hull might constitute phantom geometry. We define the notion of reduced depth hull and reduced visual hull as the parts of the corresponding hull that are phantom-free. We analyze the role of the depth information in identification of the phantom geometry. Based on this, we provide an algorithm for rendering the reduced depth hull at interactive frame-rates and suggest an approach for rendering the reduced visual hull. The rendering algorithms take advantage of modern GPU programming techniques.

Original languageEnglish (US)
Pages (from-to)175-182
Number of pages8
JournalComputer Graphics Forum
Issue number2
StatePublished - 2008
Externally publishedYes
Event29th Annual Conference on European Association for Computer Graphics, EUROGRAPHICS 2008 - Crete, Greece
Duration: Apr 14 2008Apr 18 2008

All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design


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