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DC poleHodnotaJazyk
dc.contributor.authorCsébfalvi, Balázs
dc.contributor.authorSzirmay-Kalos, László
dc.contributor.authorMárton, Gábor
dc.contributor.editorSkala, Václav
dc.date.accessioned2015-09-24T08:44:08Z
dc.date.available2015-09-24T08:44:08Z
dc.date.issued1997
dc.identifier.citationJournal of WSCG. 1997, vol. 5, no. 1-3.en
dc.identifier.issn1213-6972 (print)
dc.identifier.issn1213-6980 (CD-ROM)
dc.identifier.issn1213-6964 (online)
dc.identifier.urihttp://wscg.zcu.cz/wscg1997/wscg97.htm
dc.identifier.urihttp://hdl.handle.net/11025/15927
dc.format8 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherVáclav Skala - UNION Agencycs
dc.relation.ispartofseriesJournal of WSCGen
dc.rights© Václav Skala - UNION Agencycs
dc.subjectobjemové vykreslovánícs
dc.subjectalpha blendingcs
dc.subjectsledování paprskucs
dc.subjectlékařské zobrazovánícs
dc.subjectCTcs
dc.titleFast opacity control in rendering of volumetric CT dataen
dc.typečlánekcs
dc.typearticleen
dc.rights.accessopenAccessen
dc.type.versionpublishedVersionen
dc.description.abstract-translatedIn 3D rendering of volumetric CT data the alpha-blending technique can be used for modeling semitransparent tissues. This method assigns di erent opacity values to di erent tissue types. In practice, only four materials can be separated according to their CT numbers (Hounsfield density): air, fat, soft tissue and bone. Application of alpha-blending rendering enhances the more important tissues, assigning high opacity value for important tissues and low opacity for less important ones. For each pixel of the image, a ray is traced and the colour of the appropriate pixel is computed as a sum of intersected voxel colours weighted by opacity values. However, this computation is very slow if the size of 3D array is big. Furthermore, if the opacity value of one of the tissues needs to be changed, then the complete time-consuming rendering must be repeated in order to recompute the new weighted sums. In order to allow fast control of opacity values of a new algorithm is presented that provides fast opacity and colour modification after preprocessing the volume with fixed point of view and light source locations.en
dc.subject.translatedvolume renderingen
dc.subject.translatedalpha blendingen
dc.subject.translatedray tracingen
dc.subject.translatedmedical imagingen
dc.subject.translatedCTen
dc.type.statusPeer-revieweden
Vyskytuje se v kolekcích:Volume 5, number 1-3 (1997)

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  1. DSpace at University of West Bohemia
  2. Publikace ZČU / UWB Publications
  3. Časopisy ZČU / UWB Journals
  4. Journal of WSCG
  5. Volume 5 (1997)
  6. Volume 5, number 1-3 (1997)