Campus Units

Psychology, Industrial and Manufacturing Systems Engineering, Mechanical Engineering

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

4-2012

Journal or Book Title

IEEE Transactions on Visualization and Computer Graphics

Volume

18

Issue

4

First Page

581

Last Page

588

DOI

10.1109/TVCG.2012.58

Abstract

Stereoscopic depth cues improve depth perception and increase immersion within virtual environments (VEs). However, improper display of these cues can distort perceived distances and directions. Consider a multi-user VE, where all users view identical stereoscopic images regardless of physical location. In this scenario, cues are typically customized for one "leader" equipped with a head-tracking device. This user stands at the center of projection (CoP) and all other users ("followers") view the scene from other locations and receive improper depth cues. This paper examines perceived depth distortion when viewing stereoscopic VEs from follower perspectives and the impact of these distortions on collaborative spatial judgments. Pairs of participants made collaborative depth judgments of virtual shapes viewed from the CoP or after displacement forward or backward. Forward and backward displacement caused perceived depth compression and expansion, respectively, with greater compression than expansion. Furthermore, distortion was less than predicted by a ray-intersection model of stereo geometry. Collaboration times were significantly longer when participants stood at different locations compared to the same location, and increased with greater perceived depth discrepancy between the two viewing locations. These findings advance our understanding of spatial distortions in multi-user VEs, and suggest a strategy for reducing distortion.

Comments

This is a manuscript of an article from IEEE Transactions on Visualization and Computer Graphics 18 (2012): 581, doi: 10.1109/TVCG.2012.58. Posted with permission.

Copyright Owner

IEEE

Language

en

File Format

application/pdf

Published Version

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