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C. Niederreiter:
"Spectral Mipmapping";
Supervisor: W. Purgathofer, A. Weidlich; Institut für Computergraphik und Algorithmen, 2011.

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.

http://publik.tuwien.ac.at/files/PubDat_201399.pdf