Conservative occlusion culling for urban visualization using a slice-wise data structure

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buir.contributor.authorGüdükbay, Uğur
dc.citation.epage210en_US
dc.citation.issueNumber3-4en_US
dc.citation.spage191en_US
dc.citation.volumeNumber69en_US
dc.contributor.authorYılmaz, T.en_US
dc.contributor.authorGüdükbay, Uğuren_US
dc.date.accessioned2016-02-08T10:14:25Z
dc.date.available2016-02-08T10:14:25Z
dc.date.issued2007en_US
dc.departmentDepartment of Computer Engineeringen_US
dc.description.abstractIn this paper, we propose a framework for urban visualization using a conservative from-region visibility algorithm based on occluder shrinking. The visible geometry in a typical urban walkthrough mainly consists of partially visible buildings. Occlusion-culling algorithms, in which the granularity is buildings, process these partially visible buildings as if they are completely visible. To address the problem of partial visibility, we propose a data structure, called slice-wise data structure, that represents buildings in terms of slices parallel to the coordinate axes. We observe that the visible parts of the objects usually have simple shapes. This observation establishes the base for occlusion-culling where the occlusion granularity is individual slices. The proposed slice-wise data structure has minimal storage requirements. We also propose to shrink general 3D occluders in a scene to find volumetric occlusion. Empirical results show that significant increase in frame rates and decrease in the number of processed polygons can be achieved using the proposed slice-wise occlusion-culling as compared to an occlusion-culling method where the granularity is individual buildings. © 2007 Elsevier Inc. All rights reserved.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:14:25Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2007en
dc.identifier.doi10.1016/j.gmod.2007.01.002en_US
dc.identifier.issn1524-0703
dc.identifier.urihttp://hdl.handle.net/11693/23472
dc.language.isoEnglishen_US
dc.publisherAcademic Pressen_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.gmod.2007.01.002en_US
dc.source.titleGraphical Modelsen_US
dc.subjectSpace subdivisionen_US
dc.subjectOctreeen_US
dc.subjectOcclusion-cullingen_US
dc.subjectOccluder shrinkingen_US
dc.subjectMinkowski differenceen_US
dc.subjectFrom-region visibilityen_US
dc.subjectUrban visualizationen_US
dc.titleConservative occlusion culling for urban visualization using a slice-wise data structureen_US
dc.typeArticleen_US

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