A Meshless Hierarchical Representation for Light Transport - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Journal Articles ACM Transactions on Graphics Year : 2008

A Meshless Hierarchical Representation for Light Transport

Abstract

We introduce a meshless hierarchical representation for solving light transport problems. Precomputed radiance transfer (PRT) and finite elements require a discrete representation of illumination over the scene. Non-hierarchical approaches such as per-vertex values are simple to implement, but lead to long precomputation. Hierarchical bases like wavelets lead to dramatic acceleration, but in their basic form they work well only on flat or smooth surfaces. We introduce a hierarchical function basis induced by scattered data approximation. It is decoupled from the geometric representation, allowing the hierarchical representation of illumination on complex objects. We present simple data structures and algorithms for constructing and evaluating the basis functions. Due to its hierarchical nature, our representation adapts to the complexity of the illumination, and can be queried at different scales. We demonstrate the power of the new basis in a novel precomputed direct-to-indirect light transport algorithm that greatly increases the complexity of scenes that can be handled by PRT approaches.
Fichier principal
Vignette du fichier
lztkdsa08.pdf (9.8 Mo) Télécharger le fichier
Vignette du fichier
shot01.png (887.79 Ko) Télécharger le fichier
lztkdsa08.avi (29.56 Mo) Télécharger le fichier
Vignette du fichier
shot02.png (1.24 Mo) Télécharger le fichier
Vignette du fichier
shot03.png (603.76 Ko) Télécharger le fichier
Origin : Files produced by the author(s)
Format : Figure, Image
Format : Video
Format : Figure, Image
Format : Figure, Image

Dates and versions

inria-00345275 , version 1 (08-12-2008)

Identifiers

Cite

Jaakko Lehtinen, Matthias Zwicker, Emmanuel Turquin, Janne Kontkanen, Frédo Durand, et al.. A Meshless Hierarchical Representation for Light Transport. ACM Transactions on Graphics, 2008, Special Issue: Proceedings of SIGGRAPH 2008, 27 (3), pp.37:1-9. ⟨10.1145/1360612.1360636⟩. ⟨inria-00345275⟩
279 View
918 Download

Altmetric

Share

Gmail Facebook X LinkedIn More