“Coarse irradiance estimation using curvilinear skeleton” by Noël, Chaussard and Biri

  • ©Laurent Noël, John Chaussard, and Venceslas Biri




    Coarse irradiance estimation using curvilinear skeleton



    Light flux can take complex paths to reach the observer, especially in large and sophisticated scenes. In such situations, global illumination algorithms are used: irradiance caching, path tracing and radiosity allow to precisely compute the irradiance at any point of the scene, but remain quite slow. Our present work aims to evaluate, very coarsely, the irradiance of any point of a scene, allowing to give global illumination algorithms some information about the main direction and intensity of the light flux. We use a coarse representation of the scene using a skeleton of its voids (where the light propagates). We present two heuristics to compute a coarse radiance estimation and the main light stream orientation. Our work gives the possibility to define many other heuristics.


    1. Eisemann, E., and Décoret, X. 2008. Single-pass GPU Solid Voxelization and Applications. In GI ’08: Proceedings of Graphics Interface 2008, vol. 322, 73–80.

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©Laurent Noël, John Chaussard, and Venceslas Biri ©Laurent Noël, John Chaussard, and Venceslas Biri

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