Rendering optimisations for stylised sketching Winnemoller, Holger and Bangay, Shaun 2003, Rendering optimisations for stylised sketching, in Afrigraph '03: Proceedings of the 2nd international conference on computer graphics, virtual reality, visualisation and interaction in Africa, ACM, New York, N. Y., pp. 117-122, doi: 10.1145/602330.602353. Attached Files Name Description MIMEType Size Downloads Title Rendering optimisations for stylised sketching Author(s) Winnemoller, Holger Bangay, Shaun Conference name International conference on Computer graphics, virtual reality, visualisation and interaction in Africa (2nd : 2003 : Cape Town, South Africa) Conference location Cape Town, South Africa Conference dates 3-5 Feb. 2003 Title of proceedings Afrigraph '03: Proceedings of the 2nd international conference on computer graphics, virtual reality, visualisation and interaction in Africa Editor(s) [Unknown] Publication date 2003 Conference series International conference on Computer graphics, virtual reality, visualisation and interaction in Africa Start page 117 End page 122 Total pages 6 Publisher ACM Place of publication New York, N. Y. Keyword(s) 3D texturing coal pencil chalk hatching rendering edge-fading non-photorealistic rendering temporal coherence uncertainty-functions Summary We present work that specifically pertains to the rendering stage of stylised, non-photorealistic sketching. While a substantial body of work has been published on geometric optimisations, surface topologies, space-algorithms and natural media simulation, rendering-specific issues are rarely discussed in-depth even though they are often acknowledged. We investigate the most common stylised sketching approaches and identify possible rendering optimisations. In particular, we define uncertainty-functions, which are used to describe a human-error component, discuss how these pertain to geometric perturbation and textured silhouette sketching and explain how they can be cached to improve performance. Temporal coherence, which poses a problem for textured silhouette sketching, is addressed by means of an easily computed visibility-function. Lastly, we produce an effective yet surprisingly simple solution to seamless hatching, which commonly presents a large computational overhead, by using 3-D textures in a novel fashion. All our optimisations are cost-effective, easy to implement and work in conjunction with most existing algorithms. ISBN 1581136439 Language eng DOI 10.1145/602330.602353 Field of Research 080103 Computer Graphics Socio Economic Objective 890299 Computer Software and Services not elsewhere classified HERDC Research category E1.1 Full written paper - refereed Persistent URL http://hdl.handle.net/10536/DRO/DU:30039179 Document type: Conference Paper Collections: Faculty of Science, Engineering and Built Environment School of Information Technology Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Mon, 24 Oct 2011, 11:42:18 EST Fri, 15 Feb 2013, 11:10:15 EST Fri, 15 Feb 2013, 11:14:35 EST Filtered Full Citation counts:   Cited 0 times in TR Web of Science Cited 4 times in Scopus Search Google Scholar Access Statistics: 397 Abstract Views, 1 File Downloads  -  Detailed Statistics Created: Mon, 24 Oct 2011, 11:42:18 EST

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