Direct volume rendering of unstructured grids

dc.citation.epage406en_US
dc.citation.issueNumber3en_US
dc.citation.spage387en_US
dc.citation.volumeNumber27en_US
dc.contributor.authorBerk, Hakanen_US
dc.contributor.authorAykanat, Cevdeten_US
dc.contributor.authorGüdükbay, Uğuren_US
dc.contributor.bilkentauthorGüdükbay, Uğur
dc.contributor.bilkentauthorAykanat, Cevdet
dc.date.accessioned2016-02-08T11:55:53Z
dc.date.available2016-02-08T11:55:53Zen_US
dc.date.issued2003en_US
dc.departmentDepartment of Computer Engineeringen_US
dc.description.abstractThis paper investigates three categories of algorithms for direct volume rendering of unstructured grids, which are image-space, object-space, and hybrid methods. We propose three new algorithms. Cell Projection algorithm, which falls into object-space category, is capable of rendering non-convex meshes through a simple yet efficient sorting schema that exploits both image and object space coherencies. Existing hybrid methods use object-then-image traversal order that enforces the processing of each cell. Thus, these algorithms perform redundant operations and do not support early ray termination. We propose a hybrid method, called Span-Buffer Ray Casting (SBRC), that can support early ray termination discarding redundant operations by employing image-then-object traversal order. Another hybrid method, called Koyamada-SBRC (K-SBRC), is proposed with the motivation of refining image-space and hybrid methods to extract the best features of them. This method is developed by blending SBRC approach with Koyamada's algorithm, which is an efficient image-space algorithm. All proposed algorithms are capable of handling acyclic non-convex meshes and generating images of acceptable quality. SBRC and K-SBRC algorithms have the additional capabilities of rendering cyclic meshes and supporting early ray termination. The proposed algorithms and Koyamada's algorithm are implemented and experimented in a common framework for analyzing their relative performance. © 2003 Elsevier Science Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/S0097-8493(03)00034-7en_US
dc.identifier.eissn1873-7684en_US
dc.identifier.issn0097-8493
dc.identifier.urihttp://hdl.handle.net/11693/27532en_US
dc.language.isoEnglishen_US
dc.publisherPergamon Pressen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/S0097-8493(03)00034-7en_US
dc.source.titleComputers and Graphicsen_US
dc.subjectCyclic Meshesen_US
dc.subjectDirect Volume Renderingen_US
dc.subjectEarly Ray Terminationen_US
dc.subjectImage-Space Coherencyen_US
dc.subjectObject-Space Coherencyen_US
dc.subjectUnstructured Gridsen_US
dc.subjectAlgorithmsen_US
dc.subjectComputer Simulationen_US
dc.subjectImage Analysisen_US
dc.subjectTopologyen_US
dc.subjectUnstructured Gridsen_US
dc.subjectComputer Graphicsen_US
dc.titleDirect volume rendering of unstructured gridsen_US
dc.typeArticleen_US
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