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High-resolution simulation and rendering of gaseous phenomena from low-resolution data
Linköping University, Department of Science and Technology, Media and Information Technology.
2010 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Numerical simulations are often used in computer graphics to capture the effects of natural phenomena such as fire, water and smoke. However, simulating large-scale events in this way, with the details needed for feature film, poses serious problems. Grid-based simulations at resolutions sufficient to incorporate small-scale details would be costly and use large amounts of memory, and likewise for particle based techniques.

To overcome these problems, a new framework for simulation and rendering of gaseous phenomena is presented in this thesis. It makes use of a combination of different existing concepts for such phenomena to resolve many of the issues in using them separately, and the result is a potent method for high-detailed simulation and rendering at low cost.

The developed method utilizes a slice refinement technique, where a coarse particle input is transformed into a set of two-dimensional view-aligned slices, which are simulated at high resolution. These slices are subsequently used in a rendering framework accounting for light scattering behaviors in participating media to achieve a final highly detailed volume rendering outcome. However,the transformations from three to two dimensions and back easily introduces visible artifacts, so a number of techniques have been considered to overcome these problems, where e.g. a turbulence function is used in the final volume density function to break up possible interpolation artifacts.

Place, publisher, year, edition, pages
2010. , 62 p.
Keyword [en]
Computer graphics, Fluid simulation, Simulation refinement, Simulation optimization, Slice simulation, Volume rendering, Gaseous phenomena, Smoke, Fire
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-70269ISRN: LiU-ITN-TEK-A--10/058--SEOAI: diva2:437731
Subject / course
Master of Science in Media Technology and Engineering
Available from: 2011-08-30 Created: 2011-08-30 Last updated: 2011-08-30Bibliographically approved

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