Original title: Efektivní vzorkování matic reradiace v rendererech s podporou fluorescence
Translated title: Efficient Sampling of Re-radiation Matrices in Fluorescence-capable Rendering Systems
Authors: Hua, Qingqin ; Wilkie, Alexander (advisor) ; Iser, Tomáš (referee)
Document type: Master’s theses
Year: 2021
Language: eng
Abstract: Fluorescence is a common effect in nature, it re-emits light by absorbing photons, caus- ing a wavelength shift from a shorter wavelength to a longer one. In recent years, there is an increased interest in including fluorescence in physically-based rendering. Fluorescence behavior is properly represented as a re-radiation matrix: for a given input wavelength, this matrix indicates how much energy is re-emitted at all other wavelengths. However, such a 2D representation has a significant memory footprint, especially when a scene con- tains a high number of fluorescent objects or fluorescent textures. This thesis proposes using Gaussian Mixture Domain to model re-radiation, which allows us to significantly reduce the memory footprint. Instead of storing the full matrix, we work with a set of Gaussian parameters that also allow direct importance sampling. When accuracy is a concern, one can still use the re-radiation matrix data and just benefit from impor- tance sampling provided by the Gaussian Mixture. Our method is useful when numerous fluorescent materials are present in a scene, particularly for textures with fluorescent components. 1
Keywords: computer graphics|rendering|light transport simulation|fluorescence; počítačová grafika|renderování|simulace transportu světla|fluorescence

Institution: Charles University Faculties (theses) (web)
Document availability information: Available in the Charles University Digital Repository.
Original record: http://hdl.handle.net/20.500.11956/148663

Permalink: http://www.nusl.cz/ntk/nusl-451932


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Universities and colleges > Public universities > Charles University > Charles University Faculties (theses)
Academic theses (ETDs) > Master’s theses