Sundstedt, Veronica, Debattista, Kurt and Chalmers, Alan (2005) Perceived aliasing thresholds in high-fidelity rendering. In: APGV 05: Second Symposium on Applied Perception in Graphics and Visualization, A Coroña, Spain, 26-28 Aug 2005. Published in: Proceedings, APGV 2005 : 2nd Symposium on Applied Perception in Graphics and Visualization : A Coroña [i.e. A Coruña], Spain, August 26-28, 2005 p. 166. doi:10.1145/1080402.1080447 ISSN 9781595931399.

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Abstract

High-fidelity rendering is very computationally expensive making it difficult to achieve interactive rates except for simple scenes. Recent selective rendering techniques [Yee et al. 2001; Cater et al. 2003], which alter the number of rays cast per pixel, have been explored to achieve this goal. These approaches have shown that rendering times can be significantly reduced without perceptual degradation. In traditional ray-traced images aliasing is removed by supersampling the image plane. In this sketch we identify the threshold at which decreasing the number or rays shot per pixel would result in no perceptual degradation. We conduct psychophysical experiments using four realistic environments and one test environment as a comparison. This test scene was designed to exhibit high spatial frequencies and thus was a worst case for aliasing. We determine the computational bound by varying the number of rays shot per pixel in both still images and animations. The lighting simulation system Radiance [Ward 1994] is adapted for use in these experiments. The results can be used in the design of more effective perceptual selective rendering algorithms; using the computatinal bound as an indication of where to threshold the rendering process [Sundstedt et al. 2005]. Selective rendering will alter this threshold based on perceptual importance of pixels within the image. This will reduce computation time while maintaining a perceptually high quality result for realistic scenes.

Item Type:	Conference Item (Paper)
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Proceedings, APGV 2005 : 2nd Symposium on Applied Perception in Graphics and Visualization : A Coroña [i.e. A Coruña], Spain, August 26-28, 2005
Publisher:	ACM
ISSN:	9781595931399
Book Title:	Proceedings of the 2nd symposium on Appied perception in graphics and visualization - APGV '05
Official Date:	2005
Dates:	Date Event 2005 Published
Page Range:	p. 166
DOI:	10.1145/1080402.1080447
Status:	Peer Reviewed
Publication Status:	Published
Conference Paper Type:	Paper
Title of Event:	APGV 05: Second Symposium on Applied Perception in Graphics and Visualization
Type of Event:	Conference
Location of Event:	A Coroña, Spain
Date(s) of Event:	26-28 Aug 2005

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