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Scattering And Absorption of Light in Planetary Regoliths
11:34

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Ambient volume scattering.

Marco Ament1, Filip Sadlo, Daniel Weiskopf

  • 1VISUS, University of Stuttgart.

IEEE Transactions on Visualization and Computer Graphics
|September 21, 2013
PubMed
Summary
This summary is machine-generated.

Ambient scattering preintegrates light transport for mesoscopic scales in direct volume rendering. This method enhances visualization by providing interactive volumetric scattering and soft shadows with improved rendering speed.

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Area of Science:

  • Computer Graphics
  • Scientific Visualization
  • Computational Imaging

Background:

  • Far-range scattering effects are often negligible in volume rendering due to exponential attenuation.
  • Efficiently simulating multiple scattering on mesoscopic scales remains a challenge.

Purpose of the Study:

  • To introduce ambient scattering as a novel preintegration method for direct volume rendering.
  • To enable efficient and versatile simulation of volumetric scattering and soft shadows.

Main Methods:

  • Preintegrating multiple scattering within spherical regions using Monte Carlo simulations.
  • Developing a precomputation method independent of dataset and transfer function, creating a small lookup table.
  • Accessing the precomputed table during rendering based on ray sample properties and local material information.

Main Results:

  • Achieved interactive volumetric scattering and soft shadows with real-time control over visualization parameters.
  • Demonstrated efficient integration into existing ray marching algorithms, compatible with local illumination and ambient occlusion.
  • GPU implementation showed benefits for diverse datasets, enhancing spatial perception, illumination quality, and translucency.

Conclusions:

  • Ambient scattering offers an efficient and versatile approach for realistic volumetric rendering.
  • The method significantly improves visualization quality and rendering speed for complex scattering phenomena.
  • Enables interactive exploration of volumetric data with enhanced visual fidelity.