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Chasing the green flash: a global illumination solution for inhomogeneous media

Published: 22 April 2004 Publication History

Abstract

Several natural phenomena, such as mirages or the green flash, are owed to inhomogeneous media in which the index of refraction is not constant. This makes the light rays travel a curved path while going through those media. One way to simulate global illumination in inhomogeneous media is to use a curved ray tracing algorithm, but this approach presents some problems that still need to be solved. This paper introduces a full solution to the global illumination problem, based on what we have called curved photon mapping, that can be used to simulate several natural atmospheric phenomena. We also present a model of the Human Visual System (HVS) to display images in a more realistic way, taking into account how we perceive luminances in a real-world scene. This is of special interest in the green flash effect, where some of the perceived green is owed to bleaching of the photoreceptors in the human eye.

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cover image ACM Conferences
SCCG '04: Proceedings of the 20th Spring Conference on Computer Graphics
April 2004
233 pages
ISBN:1581139675
DOI:10.1145/1037210
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Publication History

Published: 22 April 2004

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Author Tags

  1. global illumination
  2. inhomogeneous media
  3. natural phenomena
  4. photon mapping
  5. realism
  6. rendering

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SCCG04
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SCCG04: Spring Conference in Computer Graphics 2004
April 22 - 24, 2004
Budmerice, Slovakia

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