Tuning Self-Motion Perception in Virtual Reality with Visual Illusions

Gerd Bruder, Frank Steinicke, Phil Wieland, Markus Lappe
IEEE Transactions on Visualization and Computer Graphics (TVCG), Volume 18, Number 7, page 1068--1078 - 2012
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Motion perception in immersive virtual environments significantly differs from the real world. For example, previous work has shown that users tend to underestimate travel distances in virtual environments (VEs). As a solution to this problem, researchers proposed to scale the mapped virtual camera motion relative to the tracked real-world movement of a user until real and virtual motion are perceived as equal, i.e., real-world movements could be mapped with a larger gain to the VE in order to compensate for the underestimation. However, introducing discrepancies between real and virtual motion can become a problem, in particular, due to misalignments of both worlds and distorted space cognition. In this article we describe a different approach that introduces apparent self-motion illusions by manipulating optic flow fields during movements in VEs. These manipulations can affect self-motion perception in VEs, but omit a quantitative discrepancy between real and virtual motions. In particular, we consider to which regions of the virtual view these apparent self-motion illusions can be applied, i.e., the ground plane or peripheral vision. Therefore, we introduce four illusions and show in experiments that optic flow manipulation can significantly affect users' self-motion judgments. Furthermore, we show that with such manipulations of optic flow fields the underestimation of travel distances can be compensated.

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BibTex references

  author       = "Bruder, Gerd and Steinicke, Frank and Wieland, Phil and Lappe, Markus",
  title        = "Tuning Self-Motion Perception in Virtual Reality with Visual Illusions",
  journal      = "IEEE Transactions on Visualization and Computer Graphics (TVCG)",
  number       = "7",
  volume       = "18",
  pages        = "1068--1078",
  year         = "2012",
  keywords     = "vr-speed-illusions",
  url          = "http://basilic.informatik.uni-hamburg.de/Publications/2012/BSWL12"

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» Markus Lappe