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A Compact Representation for Fluorescent Spectral Data

Abstract : We propose a technique to efficiently importance sample and store fluorescent spectral data. Fluorescence behaviour 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 contains a high number of fluorescent objects, or fluorescent textures. We propose to use 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 importance sampling provided by the Gaussian Mixture. Our method is useful when numerous fluorescent materials are present in a scene, an in particular for textures with fluorescent components.
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https://hal.archives-ouvertes.fr/hal-03274233
Contributor : Alban Fichet Connect in order to contact the contributor
Submitted on : Tuesday, June 29, 2021 - 7:05:07 PM
Last modification on : Wednesday, November 10, 2021 - 5:38:05 PM
Long-term archiving on: : Thursday, September 30, 2021 - 7:28:55 PM

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  • HAL Id : hal-03274233, version 1

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Qingqin Hua, Alban Fichet, Alexander Wilkie. A Compact Representation for Fluorescent Spectral Data. Eurographics Symposium on Rendering, Jun 2021, Saarbrücken, Germany. ⟨hal-03274233⟩

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