A Lighting Reproduction Approach to Live-Action Compositing (bibtex)
by Paul Debevec, Andreas Wenger, Chris Tchou, Andrew Gardner, Jamie Waese, Tim Hawkins
Abstract:
We describe a process for compositing a live performance of an actor into a virtual set wherein the actor is consistently illuminated by the virtual environment. The Light Stage used in this work is a two-meter sphere of inward-pointing RGB light emitting diodes focused on the actor, where each light can be set to an arbitrary color and intensity to replicate a real-world or virtual lighting environment. We implement a digital two-camera infrared matting system to composite the actor into the background plate of the environment without affecting the visible-spectrum illumination on the actor. The color reponse of the system is calibrated to produce correct color renditions of the actor as illuminated by the environment. We demonstrate moving-camera composites of actors into real-world environments and virtual sets such that the actor is properly illuminated by the environment into which they are composited.
Reference:
A Lighting Reproduction Approach to Live-Action Compositing (Paul Debevec, Andreas Wenger, Chris Tchou, Andrew Gardner, Jamie Waese, Tim Hawkins), In SIGGRAPH 2002, 2002.
Bibtex Entry:
@inproceedings{debevec_lighting_2002,
	address = {San Antonio, TX},
	title = {A {Lighting} {Reproduction} {Approach} to {Live}-{Action} {Compositing}},
	url = {http://ict.usc.edu/pubs/A%20Lighting%20Reproduction%20Approach%20to%20Live-Action%20Compositing.pdf},
	abstract = {We describe a process for compositing a live performance of an actor into a virtual set wherein the actor is consistently illuminated by the virtual environment. The Light Stage used in this work is a two-meter sphere of inward-pointing RGB light emitting diodes focused on the actor, where each light can be set to an arbitrary color and intensity to replicate a real-world or virtual lighting environment. We implement a digital two-camera infrared matting system to composite the actor into the background plate of the environment without affecting the visible-spectrum illumination on the actor. The color reponse of the system is calibrated to produce correct color renditions of the actor as illuminated by the environment. We demonstrate moving-camera composites of actors into real-world environments and virtual sets such that the actor is properly illuminated by the environment into which they are composited.},
	booktitle = {{SIGGRAPH} 2002},
	author = {Debevec, Paul and Wenger, Andreas and Tchou, Chris and Gardner, Andrew and Waese, Jamie and Hawkins, Tim},
	month = jul,
	year = {2002},
	keywords = {Graphics},
	pages = {547--556}
}
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