An incremental photon-mapping algorithm for fast walk-through animations

Kosuke Ikeda, Hiroyuki Takizawat, Hiroaki Kobayashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A photo-realistic walk-through animation is required for entertainment and industrial uses. Although photon-mapping is an effective approach to photo-realistic image synthesis based on global illumination, it is difficult to apply photon-mapping to generation of such animations because of its high computational cost. This paper proposes a new algorithm to accelerate the generation of walk-through animations using photon-mapping. The proposed algorithm stores diffuse radiances, which do not depend on the camera position, and reprojects these radiances onto the screen when rendering the subsequent frame. The algorithm uses photon-mapping incrementally only when required. The pixel intensities not determined by the reprojection are preciously recalculated by photon-mapping. As the cost of the reprojection is much lower than that of the recalculation, the algorithm can generate the subsequent frame much faster than the standard photon-mapping algorithm. The algorithm can also render the scenes with participating media that photon mapping can efficiently handle. The experimental results indicate that the proposed algorithm can achieve significant acceleration of generating a walk-through animation based on photon mapping without remarkable degradation of visual quality.

Original languageEnglish
Title of host publicationProceedings of the Eighth IASTED International Conference on Computer Graphics and Imaging, CGIM 2005
EditorsM.H. Hamza
Pages1-7
Number of pages7
Publication statusPublished - 2005 Dec 1
EventEighth IASTED International Conference on Computer Graphics and Imaging, CGIM 2005 - Honolulu, HI, United States
Duration: 2005 Aug 152005 Aug 17

Publication series

NameProceedings of the Eighth IASTED International Conference on Computer Graphics and Imaging, CGIM 2005

Other

OtherEighth IASTED International Conference on Computer Graphics and Imaging, CGIM 2005
CountryUnited States
CityHonolulu, HI
Period05/8/1505/8/17

Keywords

  • Diffuse cache
  • Photon-mapping
  • Reprojection
  • Walk-through animation

ASJC Scopus subject areas

  • Engineering(all)

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