Efficient Ambient and Emissive Tissue Illumination using Local Occlusion in Multiresolution Volume Rendering

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dc.contributor.authorHernell, Fridaen_US
dc.contributor.authorLjung, Patricen_US
dc.contributor.authorYnnerman, Andersen_US
dc.contributor.editorH.-C. Hege and R. Machiraju and T. Moeller and M. Srameken_US
dc.date.accessioned2014-01-29T17:53:52Z
dc.date.available2014-01-29T17:53:52Z
dc.date.issued2007en_US
dc.description.abstractThis paper introduces a novel technique to compute illumination for Direct Volume Rendering. By adding shadow effects to volume rendered images, the perception of shapes and tissue properties can be significantly improved and it has the potential to increase the diagnostic value of medical volume rendering. The integrated intensity of incident light for a voxel is computed using a local approximation of the ambient occlusion, thus avoiding the rendering of tissues with very low illumination. Luminous tissue effects are also introduced to enhance the illumination model, controlled through an emissive component in the transfer function. This effect allows the user to highlight specific structures and can give a better understanding of tissue density. Multiresolution volume management and GPU-based computation is used to significantly speed-up the calculations and to support large data sets. The scheme yields interactive frame rates for incrementally refined ambient and emissive illumination for arbitrary transfer function changes.en_US
dc.description.seriesinformationEurographics/IEEE VGTC Symposium on Volume Graphicsen_US
dc.identifier.isbn978-3-905674-03-3en_US
dc.identifier.issn1727-8376en_US
dc.identifier.urihttps://doi.org/10.2312/VG/VG07/001-008en_US
dc.publisherThe Eurographics Associationen_US
dc.subjectCategories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Viewing algorithms; I.3.7 [Computer Graphics]: Color, shading, shadowing, and texture; I.4.10 [Image Processing and Computer Vision]: Volumetric;en_US
dc.titleEfficient Ambient and Emissive Tissue Illumination using Local Occlusion in Multiresolution Volume Renderingen_US
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VG07: Eurographics/IEEE VGTC Symposium on Volume Graphics 2007