Free Path Sampling in High Resolution Inhomogeneous Participating Media

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dc.contributor.authorSzirmay-Kalos, Lászlóen_US
dc.contributor.authorTóth, Balázsen_US
dc.contributor.authorMagdics, Milánen_US
dc.contributor.editorEduard Groeller and Holly Rushmeieren_US
dc.date.accessioned2015-02-27T10:19:10Z
dc.date.available2015-02-27T10:19:10Z
dc.date.issued2011en_US
dc.description.abstractThis paper presents efficient algorithms for free path sampling in heterogeneous participating media defined either by high-resolution voxel arrays or generated procedurally. The method is based on the concept of mixing ‘virtual’ material or particles to the medium, augmenting the extinction coefficient to a function for which the free path can be sampled in a straightforward way. The virtual material is selected such that it modifies the volume density but does not alter the radiance. We define the total extinction coefficient of the real and virtual particles by a low-resolution grid of super-voxels that are much larger than the real voxels defining the medium. The computational complexity of the proposed method depends just on the resolution of the super-voxel grid and does not grow with the resolution above the scale of super-voxels. The method is particularly efficient to render large, low-density, heterogeneous volumes, which should otherwise be defined by enormously high resolution voxel grids and where the average free path length would cross many voxels.en_US
dc.description.number1
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume30
dc.identifier.doi10.1111/j.1467-8659.2010.01831.xen_US
dc.identifier.issn1467-8659en_US
dc.identifier.urihttps://doi.org/10.1111/j.1467-8659.2010.01831.xen_US
dc.publisherThe Eurographics Association and Blackwell Publishing Ltd.en_US
dc.titleFree Path Sampling in High Resolution Inhomogeneous Participating Mediaen_US
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