Image synthesis using adjoint photons

  • Authors:
  • R. Keith Morley;Solomon Boulos;Jared Johnson;David Edwards;Peter Shirley;Michael Ashikhmin;Simon Premože

  • Affiliations:
  • Princeton University;University of Utah;University of Central Florida;University of Utah;University of Utah;SUNY Stony Brook;-

  • Venue:
  • GI '06 Proceedings of Graphics Interface 2006
  • Year:
  • 2006

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Abstract

The most straightforward image synthesis algorithm is to follow photon-like particles from luminaires through the environment. These particles scatter or are absorbed when they interact with a surface or a volume. They contribute to the image if and when they strike a sensor. Such an algorithm implicitly solves the light transport equation. Alternatively. adjoint photons can be traced from the sensor to the luminaires to produce the same image. This "adjoint photon" tracing algorithm is described, and its strengths and weaknesses are discussed, as well as details needed to make adjoint photon tracing practical.