Proceedings: GI 1997

An Image-Space Refinement Criterion for Linear Hierarchical Radiosity

Ignacio Martin, Xavier Pueyo, Dani Tost

Proceedings of Graphics Interface '97: Kelowna, British Columbia, Canada, 21 - 23 May 1997, 26-36

DOI 10.20380/GI1997.04

  • BibTeX

      title = {An Image-Space Refinement Criterion for Linear Hierarchical Radiosity},
      author = {Ignacio Martin and Xavier Pueyo and Dani Tost},
      booktitle = {Proceedings of the Graphics Interface 1997 Conference, May 21-23, 1997, Kelowna, BC, Canada},
      year = {1997},
      month = {May},
      pages = {26--36},
      url = {}


A Linear Hierarchical Radiosity method using point collocation and triangle meshes is proposed that allows C0 continuity and performs energy exchange at any level both in the shooter and the receiver; this method leads to an exact representation of the Gouraud shading interpolation that will be used for rendering. A new refinement criterion is presented which tries to improve image quality taking into account: the smoothness of the solution based on pixel intensity values instead of energy ones, and visibility changes along the surfaces for high gradient detection (sharp shadows). In order to perform a efficient refinement a data structure is proposed which isolates every shooter contribution over each receiver and allows to only refine high error interactions.