Broad Area Colloquium For AI-Geometry-Graphics-Robotics-Vision
(CS 528)
Image-Based Techniques for Relighting People, Places, and Things
Paul Debevec, USC
September 26, 2005, 4:15PM
Hewlett (TCSeq) 200
http://graphics.stanford.edu/ba-colloquium/
Abstract
Image-Based Relighting synthesizes images of people, objects, or
places in new illumination conditions based on photographs of the
subject under example lighting conditions. Such techniques complement
traditional image-based modeling and rendering techniques, allowing
the acquisition of computer graphics representations of real-world
subjects where control of lighting and viewpoint can be chosen
according to a particular visualization need or creative vision. In this
talk I will describe three recent efforts in acquiring relightable
image-based models of people, places, and things. First, I will
present a real-time light stage device that uses time-multiplexed LED
lighting and high speed photography to capture a relightable movie of
a human performance, including the possibility of reproducing
spatially-varying lighting. Second, I will describe a dual light
stage device that leverages a bright laser beam and the reversibility
of light transport to capture relightable images of objects with
arbitrarily high specular reflectance or translucency. Finally, I
will describe an environmental reflectometry process used to capture a
relightable 3D model of the Parthenon on the Athenian Acropolis and to
reunite it with its sculptures in the British Museum.
Joint work with Andreas Wenger, Chris Tchou, Tim Hawkins, Per
Einarsson, Andrew Gardner, Jonas Unger, Andrew Jones, Mark Bolas, Ian
MacDowall, Charis Poullis, Jessi Stumpfel, Andrew Jones, Nathaniel
Yun, Therese Lundgren, Marcos Fajardo, and Philippe Martinez
About the Speaker
Paul Debevec is a research assistant professor at the University of
Southern California (USC) and directs the graphics laboratory at USC's
Institute for Creative Technologies. His Ph.D. thesis at UC Berkeley
presented Facade, an image-based modeling and rendering system for
creating photoreal architectural models from photographs. He
subsequently developed techniques for illuminating computer-generated
scenes with real-world lighting captured through high dynamic range
photography, demonstrating new image-based lighting techniques in his
animations "Rendering with Natural Light", "Fiat Lux", and "The
Parthenon". He has also led the design of HDR Shop, the first
widely-used high dynamic range image editing program. Debevec's
recent work has produced several light stage devices that allow
objects, actors, and performances to be synthetically illuminated with
novel lighting, recently used to create photoreal digital actors for
the 2004 film "Spider-Man 2". Debevec received ACM SIGGRAPH's
Significant New Researcher Award in 2001.
Contact: bac-coordinators@cs.stanford.edu
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