Judgment of natural perspective projections in head-mounted display environments

Frank Steinicke, Gerd Bruder, Klaus Hinrichs, Markus Lappe, Scott Kuhl, Pete Willemsen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

The display units integrated in todays head-mounted displays (HMDs) provide only a limited field of view (FOV) to the virtual world. In order to present an undistorted view to the virtual environment (VE), the perspective projection used to render the VE has to be adjusted to the limitations caused by the HMD characteristics. In particular, the geometric field of view (GFOV), which defines the virtual aperture angle used for rendering of the 3D scene, is set up according to the display's field of view. A discrepancy between these two fields of view distorts the geometry of the VE in a way that either minifies or magnifies the imagery displayed to the user. Discrepancies between the geometric and physical FOV causes the imagery to be minified or magnified. This distortion has the potential to negatively or positively affect a user's perception of the virtual space, sense of presence, and performance on visual search tasks. In this paper we analyze if a user is consciously aware of perspective distortions of the VE displayed in the HMD. We introduce a psychophysical calibration method to determine the HMD's actual field of view, which may vary from the nominal values specified by the manufacturer. Furthermore, we conducted an experiment to identify perspective projections for HMDs which are identified as natural by subjects-even if these perspectives deviate from the perspectives that are inherently defined by the display's field of view. We found that subjects evaluate a field of view as natural when it is larger than the actual field of view of the HMD-in some cases up to 50%.

Original languageEnglish (US)
Title of host publicationProceedings - VRST 2009 - 16th ACM Symposium on Virtual Reality Software and Technology
Pages35-42
Number of pages8
DOIs
StatePublished - Dec 1 2009
EventVRST 2009 - 16th ACM Symposium on Virtual Reality Software and Technology - Kyoto, Japan
Duration: Nov 18 2009Nov 20 2009

Publication series

NameProceedings of the ACM Symposium on Virtual Reality Software and Technology, VRST

Other

OtherVRST 2009 - 16th ACM Symposium on Virtual Reality Software and Technology
CountryJapan
CityKyoto
Period11/18/0911/20/09

Keywords

  • Field of view
  • Head-mounted displays
  • Virtual reality

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