Spectral Mipmapping

Christian Niederreiter
Spectral Mipmapping
[ Poster] [ Thesis]
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Abstract

Full-spectral color rendering capability of global illumination renderers is still in need of improvement, particularly regarding performance, which is a reason why many modelling programs for global illumination are focused on three-component based color representation (e.g. RGB). Full-spectral color representations are the basis for realistic color appearance in realistic image synthesis. Currently, if compared to common three-component rendering, the major disadvantage of fullspectral rendering comes from higher computation costs because of the greater amount of processed information. This thesis investigates promising approaches of spectral color representation in the context of a multi-level color rendering model called Spectral Mipmapping, focused on the trade-off between time-efficiency and resulting image quality in terms of perceived color difference. A test implementation in a basic ray tracing renderer is used to evaluate results and make suggestions concerning appropriate code design optimizations and spectral sampling strategies. The influence of compiler optimization and vector instruction use (based on SSE instructions) is discussed.

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@mastersthesis{Niederreiter_2011_SM,
  title =      "Spectral Mipmapping",
  author =     "Christian Niederreiter",
  year =       "2011",
  abstract =   "Full-spectral color rendering capability of global
               illumination renderers is still in need of improvement,
               particularly regarding performance, which is a reason why
               many modelling programs for global illumination are focused
               on three-component based color representation (e.g. RGB).
               Full-spectral color representations are the basis for
               realistic color appearance in realistic image synthesis.
               Currently, if compared to common three-component rendering,
               the major disadvantage of fullspectral rendering comes from
               higher computation costs because of the greater amount of
               processed information. This thesis investigates promising
               approaches of spectral color representation in the context
               of a multi-level color rendering model called Spectral
               Mipmapping, focused on the trade-off between time-efficiency
               and resulting image quality in terms of perceived color
               difference. A test implementation in a basic ray tracing
               renderer is used to evaluate results and make suggestions
               concerning appropriate code design optimizations and
               spectral sampling strategies. The influence of compiler
               optimization and vector instruction use (based on SSE
               instructions) is discussed.",
  address =    "Favoritenstrasse 9-11/186, A-1040 Vienna, Austria",
  school =     "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology",
  month =      sep,
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2011/Niederreiter_2011_SM/",
}