Realistic perspective projections for virtual objects and environments

Computer graphics systems provide sophisticated means to render virtual 3D space to 2D display surfaces by applying planar geometric projections. In a realistic viewing condition the perspective applied for rendering should appropriately account for the viewer's location relative to the image. As a result, an observer would not be able to distinguish between a rendering of a virtual environment on a computer screen and a view “through” the screen at an identical real-world scene. Until now, little effort has been made to identify perspective projections which cause human observers to judge them to be realistic. In this article we analyze observers' awareness of perspective distortions of virtual scenes displayed on a computer screen. These distortions warp the virtual scene and make it differ significantly from how the scene would look in reality. We describe psychophysical experiments that explore the subject's ability to discriminate between different perspective projections and identify projections that most closely match an equivalent real scene. We found that the field of view used for perspective rendering should match the actual visual angle of the display to provide users with a realistic view. However, we found that slight changes of the field of view in the range of 10-20% for two classes of test environments did not cause a distorted mental image of the observed models.

[1]  John M. Kennedy,et al.  Optics Painting and Photography , 1970 .

[2]  William B. Thompson,et al.  HMD calibration and its effects on distance judgments , 2008, APGV '08.

[3]  Bob G. Witmer,et al.  Judging Perceived and Traversed Distance in Virtual Environments , 1998, Presence.

[4]  W. D. Wright.  Optics Painting and Photography , 1971 .

[5]  Jannick P. Rolland,et al.  Towards Quantifying Depth and Size Perception in Virtual Environments , 1993, Presence: Teleoperators & Virtual Environments.

[6]  Anselmo Lastra,et al.  Virtual Environments: A Survey of the Technology , 1993 .

[7]  J. Philbeck,et al.  Visual Perception of Location and Distance , 1996 .

[8]  Robert Rieger,et al.  Towards attention-centered interfaces: An aesthetic evaluation of perspective with eye tracking , 2008, TOMCCAP.

[9]  Ronald A. Rensink,et al.  TO SEE OR NOT TO SEE: The Need for Attention to Perceive Changes in Scenes , 1997 .

[10]  Margaret A. Hagen,et al.  The Perception of Pictures , 1982 .

[11]  Frank H. Durgin,et al.  Distance Perception and the Visual Horizon in Head-Mounted Displays , 2005, TAP.

[12]  Woodrow Barfield,et al.  Estimation of spatial distortion as a function of geometric parameters of perspective , 1995, IEEE Trans. Syst. Man Cybern..

[13]  Dennis C. Neale.  Spatial Perception in Desktop Virtual Environments , 1996 .

[14]  Leslie D. Stroebel.  View Camera Technique , 1976 .

[15]  Sarah H. Creem-Regehr,et al.  HMD calibration and its effects on distance judgments , 2009, ACM Trans. Appl. Percept..

[16]  Victoria Interrante,et al.  Analyzing the effect of a virtual avatar's geometric and motion fidelity on ego-centric spatial perception in immersive virtual environments , 2009, VRST '09.

[17]  Philippe Coiffet,et al.  Virtual Reality Technology , 2003, Presence: Teleoperators & Virtual Environments.

[18]  S. Ellis,et al.  Virtual space and 2-dimensional effects in perspective displays , 1986 .

[19]  John Hart,et al.  ACM Transactions on Graphics , 2004, SIGGRAPH 2004.

[20]  Mark H. Draper,et al.  Effects of Image Scale and System Time Delay on Simulator Sickness within Head-Coupled Virtual Environments , 2001, Hum. Factors.

[21]  Doug A. Bowman,et al.  Effects of information layout, screen size, and field of view on user performance in information‐rich virtual environments , 2005, VRST '05.

[22]  Mark Lehto,et al.  A review of: “Virtual Reality Technology” Grigore Burdea and Philippe Coiffet John Wiley & Sons, Inc., 1994 , 1996 .

[23]  Denis Zorin,et al.  Correction of geometric perceptual distortions in pictures , 1995, SIGGRAPH.

[24]  Woodrow Barfield,et al.  Presence within Virtual Environments as a Function of Visual Display Parameters , 1996, Presence: Teleoperators & Virtual Environments.

[25]  Klaus H. Hinrichs,et al.  Judgment of natural perspective projections in head-mounted display environments , 2009, VRST '09.

[26]  John Murray,et al.  Some perspectives on visual depth perception , 1994, COMG.

[27]  James A. Ferwerda.  Psychophysics 101: how to run perception experiments in computer graphics , 2008, SIGGRAPH '08.

[28]  Bruce Bridgeman,et al.  Perception & control of self-motion , 1991 .

[29]  Lars Kjelldahl,et al.  A study on how depth perception is affected by different presentation methods of 3D objects on a 2D display , 1995, Comput. Graph..

[30]  M. Goulding,et al.  Erratum: Lbx1 and Tlx3 are opposing switches in determining GABAergic versus glutamatergic transmitter phenotypes , 2005, Nature Neuroscience.

[31]  Peter Willemsen,et al.  The effects of head-mounted display mechanical properties and field of view on distance judgments in virtual environments , 2009, TAP.