Ray tracing mirages

Berger, Martin; Trout, Terry; Levit, N.

doi:10.1109/38.55151

Cited by 38 publications

(27 citation statements)

References 3 publications

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“…It is similar to the proposed in [10] but instead of pure refractions it considers parabolic paths of light inside the different layers, considering a set of perlayer individual properties. Lint¸u et al [13] follow the work in [12], including also wavelength dependance, and consequently it is capable to simulate dispersion-based atmospheric phenomena, like the green flash.…”

Section: Refraction Relatedmentioning

confidence: 99%

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Simulation of atmospheric phenomena

Gutiérrez

Serón

Muñoz

et al. 2006

Computers & Graphics

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This paper presents a physically based simulation of atmospheric phenomena. It takes into account the physics of non-homogeneous media in which the index of refraction varies continuously, creating curved light paths. As opposed to previous research on this area, we solve the physically based differential equation that describes the trajectory of light. We develop an accurate expression of the index of refraction in the atmosphere as a function of wavelength, based on real measured data. We also describe our atmosphere profile manager, which lets us mimic the initial conditions of real-world scenes for our simulations. The method is validated both visually (by comparing the images with the real pictures) and numerically (with the extensive literature from other areas of research such as optics or meteorology). The phenomena simulated include the inferior and superior mirages, the Fata Morgana, the Novaya-Zemlya, the Viking's end of the world, the distortions caused by heat waves and the green flash. r

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Section: Refraction Relatedmentioning

confidence: 99%

“…The first work considering the atmosphere as an inhomogeneous medium, in which the index of refraction varies at different heights, was developed by Berger et al [10]. As a consequence, the light path is modified not only by the interaction with different objects, but by the own atmosphere as well.…”

Section: Refraction Relatedmentioning

confidence: 99%

Simulation of atmospheric phenomena

Gutiérrez

Serón

Muñoz

et al. 2006

Computers & Graphics

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“…It uses what we call the curved volume photon mapping algorithm, which curves both photons and eye rays as they travel through the medium, according to Fermat's Principle. By storing in the photon map even the direct contribution of the light sources we avoid casting shadow rays, one of the main problems of previous curved raytracing works (Berger and Trout [1990]; Musgrave [1990]; Stam and Languenou [1996];Gröeller [1995]). …”

Section: Lucifermentioning

confidence: 99%

Inelastic scattering in participating media using curved photon mapping

Gutiérrez

Serón

Muñoz

et al. 2004

ACM SIGGRAPH 2004 Sketches on - SIGGRAPH '04

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“…In a way this is similar to al-Haytham and Kepler's discovery that the eye is merely a lens focussing light on the retina. Fermat's principle was introduced for rendering of mirages [Berger and Trout 1990] at a rather late time in graphics.…”

Section: Realistic Image Synthesismentioning

confidence: 99%

The Aristotelian rainbow

Frisvad

Christensen

Falster

2007

Proceedings of the 5th International Conference on Computer Graphics and Interactive Techniques in Australia and Southeast Asia

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Figure 1: A rainbow rendered in real-time using Aristotle's theory for rainbow formation. AbstractDevelopments in the graphics discipline called realistic image synthesis are in many ways related to the historical development of theories of light. And theories of light will probably continue to inspire the ongoing search for realism in graphics. To nurture this inspiration, we present the first in-depth, source-based historical study that pinpoints events with relevance for graphics in the development of theories of light. We also show that ancient mathematical models for light scattering phenomena may still find a use in the branch of realistic image synthesis concerned with real-time rendering. As an example we use Aristotle's theory of rainbow formation to construct a method for real-time rendering of rainbows. This example serves as an invitation to use the overview and references provided in this paper, not only for understanding where many of the physical concepts used in graphics come from, but also for finding more mathematical and physical models that are useful in graphics.

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Ray tracing mirages

Cited by 38 publications

References 3 publications

Simulation of atmospheric phenomena

Simulation of atmospheric phenomena

Inelastic scattering in participating media using curved photon mapping

The Aristotelian rainbow

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