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          Institute: MPI für Informatik     Collection: Computer Graphics Group     Display Documents



ID: 356632.0, MPI für Informatik / Computer Graphics Group
Spatio-temporal Reflectance Sharing for Relightable 3D Video
Authors:Ahmed, Naveed; Theobalt, Christian; Seidel, Hans-Peter
Language:English
Publisher:Springer
Place of Publication:Berlin, Germany
Date of Publication (YYYY-MM-DD):2007
Title of Proceedings:Computer Vision/Computer Graphics Collaboration Techniques : Third International Conference, MIRAGE 2007
Start Page:47
End Page:58
Title of Series:Lecture Notes in Computer Science
Place of Conference/Meeting:Rocquencourt, France
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
2007-03-28
End Date of Conference/Meeting 
 (YYYY-MM-DD):
2007-03-30
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:In our previous work, we have shown that by means of a model based approach,
relightable free viewpoint videos of human actors can be reconstructed from
only a handful of multi view video streams recorded under calibrated
illumination. To achieve this purpose, we employ a marker free motion capture
approach to measure dynamic human scene geometry. Reflectance samples for each
surface point are captured by exploiting the fact that, due to the person's
motion, each surface location is, over time, exposed to the acquisition sensors
under varying orientations. Although this is the first setup of its kind to
measure surface reflectance from footage of arbitrary human performances, our
approach may lead to a biased sampling of surface reflectance since each
surface point is only seen under a limited number of half vector directions. We
thus propose in this paper a novel algorithm that reduces the bias in BRDF
estimates of a single surface point by cleverly taking into account reflectance
samples from other surface locations made of similar material. We demonstrate
the improvements achieved with this spatio temporal reflectance sharing
approach both visually and quantitatively.
Last Change of the Resource (YYYY-MM-DD):2008-03-12
External Publication Status:published
Document Type:Conference-Paper
Communicated by:Hans-Peter Seidel
Affiliations:MPI für Informatik/Computer Graphics Group
Identifiers:LOCALID:C12573CC004A8E26-1FCEB1FF874D0295C1257296004D07CC-...
DOI:10.1007/978-3-540-71457-6_5
ISBN:978-3-540-71456-9
Full Text:
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