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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.

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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
Collection: School of Information Technology
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