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Efficient Re-rendering of Naturally Illuminated Environments

  • Jeffry S. Nimeroff
  • Eero Simoncelli
  • Julie Dorsey
Part of the Focus on Computer Graphics book series (FOCUS COMPUTER)

Abstract

We present a method for the efficient re-rendering of a scene under a directional illuminant at an arbitrary orientation. We take advantage of the linearity of the rendering operator with respect to illumination for a fixed scene and camera geometry. Re-rendering is accomplished via linear combination of a set of pre-rendered “basis” images. The theory of steerable functions provides the machinery to derive an appropriate set of basis images. We demonstrate the technique on both simple and complex scenes illuminated by an approximation to natural skylight. We show re-rendering simulations under conditions of varying sun position and cloudiness.

Keywords

Computer Graphic Directional Cosine Basis Image Global Illumination Fourth Order Approximation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EUROGRAPHICS The European Association for Computer Graphics 1995

Authors and Affiliations

  • Jeffry S. Nimeroff
    • 1
  • Eero Simoncelli
    • 1
  • Julie Dorsey
    • 1
    • 2
  1. 1.Department of Computer and Information ScienceUniversity of PennsylvaniaPhiladelphiaUSA
  2. 2.Department of ArchitectureUniversity of PennsylvaniaPhiladelphiaUSA

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