On Estimating the Effectiveness of Temporal and Spatial Coherence in Parallel Ray Tracing

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dc.contributor.authorCosenza, Biagioen_US
dc.contributor.authorCordasco, Gennaroen_US
dc.contributor.authorChiara, Rosario Deen_US
dc.contributor.authorErra, Ugoen_US
dc.contributor.authorScarano, Vittorioen_US
dc.contributor.editorVittorio Scarano and Rosario De Chiara and Ugo Erraen_US
dc.date.accessioned2014-01-27T16:30:14Z
dc.date.available2014-01-27T16:30:14Z
dc.date.issued2008en_US
dc.description.abstractIn this paper we estimate the effectiveness of exploiting coherence in Parallel Ray Tracing. We present a load- balancing technique which divides the original rendering problem in balanced subtasks and distribute them to independent processors through a Prediction Binary Tree (PBT). Furthermore the PBT allows to exploit temporal coherence among successive image frames. At each new frame, it updates the current PBT using a cost function which uses the previous rendering time as cost estimate. We also provide two heuristics which take advantage of data-locality. We assess the effectiveness of the proposed solution by running two experiments. The £rst one aims to investigate the accurancy of predictions made using the PBT. Results show that such predictions are quite accurate even considering a heavily unbalanced scene and a fast moving camera. The second experiment evaluates the two locality-aware heuristics showing a modest improvement.en_US
dc.description.seriesinformationEurographics Italian Chapter Conferenceen_US
dc.identifier.isbn978-3-905673-68-5en_US
dc.identifier.urihttps://doi.org/10.2312/LocalChapterEvents/ItalChap/ItalianChapConf2008/097-104en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectCategories and Subject Descriptors (according to ACM CCS): C.1.4 [Processor Architectures]: Parallel Architectures I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism.en_US
dc.titleOn Estimating the Effectiveness of Temporal and Spatial Coherence in Parallel Ray Tracingen_US
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