A Compact Representation for Fluorescent Spectral Data

Hua, Qingqin; Fichet, Alban; Wilkie, Alexander

A Compact Representation for Fluorescent Spectral Data

Files

225-234.pdf (7.42 MB)

Date

2021

Authors

Hua, Qingqin
Fichet, Alban
Wilkie, Alexander

Publisher

The Eurographics Association

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.

        @inproceedings{10.2312:sr.20211305
,
booktitle = {Eurographics Symposium on Rendering - DL-only Track
},
editor = {Bousseau, Adrien and McGuire, Morgan
},
title = {{A Compact Representation for Fluorescent Spectral Data
}},
author = {Hua, Qingqin and 
Fichet, Alban and 
Wilkie, Alexander
},
year = {2021
},
publisher = {The Eurographics Association
},
ISSN = {1727-3463
},
ISBN = {978-3-03868-157-1
},
DOI = {10.2312/sr.20211305
}
}