Non-Photorealistic Computer Graphics Library

[ home · search · about · links · contact · rss ] [ submit bibtex ] [ BookCite · NPR Books ]

User:

Pass:

Found 3 item(s) authored by "Peter Willemsen" Find Author on Google.

Technical Report An Experimental Comparision of Perceived Egocentric Distance in Real, Image-Based, and Traditional Virtual Environments using Direct Walking Tasks

Author(s): Peter Willemsen, Amy A. Gooch.
Technical Report: School of Computing, University of Utah, No. UUCS-02-009, February, 2002.
[BibTeX] Find this paper on Google

Abstract:
In virtual environments, perceived egocentric distances are consistently underestimated when compared to the same distance judgments in the real world. The research presented in this paper explores two possible causes for this reduced distance perception in virtual environments: (1) real-time computer graphics rendering, and (2) immersive display technology. Our experiment compared egocentric distance judgments in three complex, indoor environments: a real hallway with full-cue conditions; a virtual, stereoscopic, photographic panorama; and a virtual, stereoscopic computer model. Perceived egocentric distance was determined by a directed walking task in which subjects walk blindfolded to the target. Our results show there is a significant difference in distance judgments between real and virtual environments. However, the differences between distance judgments in virtual photographic panorama environments and traditionally rendered virtual environments are small, suggesting that the display device is affecting distance judgments in virtual environments.

Proceedings Evaluating Space Perception in NPR Immersive Environments
Amy A. Gooch, Peter Willemsen.
2nd International Symposium on Non-Photorealistic Animation and Rendering (NPAR'02), pp. 105--110, Annecy, France, June 3-5, 2002. [BibTeX]

Article Resolution Independent NPR-Style 3D Line Textures
Kristin Potter, Amy A. Gooch, Bruce Gooch, Peter Willemsen, Joe Kniss, Richard Riesenfeld, Peter Shirley.
Computer Graphics Forum, Vol. 28, No. 1, pp. 56--66, 2009. [BibTeX]

Visitors: 188736