Historygrams: Enabling Interactive Global Illumination in Direct Volume Rendering using Photon Mapping

Poster at Eurographics Symposium on Rendering (EGSR) - 2013
Rendering speeds for volume data have improved greatly over the past decades due to development of both hardware and algorithms. However, current methods for volumetric illumination in Direct Volume Rendering (DVR) are still severely limited, often only handling single-scattering or not even taking volumetric self shadowing into account. Within DVR tradeoffs have usually been made in order to support interactive editing of the transfer function, which is an integral part of any DVR pipeline. In this work we enable highly realistic volume renderings at interactive rates, based on photon mapping. We achieve interactive framerates, by introducing a novel approach where only light interactions that have been affected by the parameter changes are recomputed. We introduce interactive photon mapping for DVR by proposing a novel concept, which we refer to as Historygrams.

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BibTex references

@misc{JKRY13,
  author       = {J{\"o}nsson, Daniel and Kronander, Joel and Ropinski, Timo and Ynnerman, Anders},
  title        = {{Historygrams: Enabling Interactive Global Illumination in Direct Volume Rendering using Photon Mapping}},
  year         = {2013},
  howpublished = {Poster at Eurographics Symposium on Rendering (EGSR)}
}

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