PMID- 36048994
OWN - NLM
STAT- MEDLINE
DCOM- 20221025
LR  - 20221115
IS  - 1941-0506 (Electronic)
IS  - 1077-2626 (Linking)
VI  - 28
IP  - 11
DP  - 2022 Nov
TI  - The impacts of lens and stereo camera separation on perceived slant in Virtual 
      Reality head-mounted displays.
PG  - 3759-3766
LID - 10.1109/TVCG.2022.3203098 [doi]
AB  - Stereoscopic AR and VR headsets have displays and lenses that are either fixed or 
      adjustable to match a limited range of user inter-pupillary distances (IPDs). 
      Projective geometry predicts a misperception of depth when either the displays or 
      virtual cameras used to render images are misaligned with the eyes. However, 
      misalignment between the eyes and lenses might also affect binocular convergence, 
      which could further distort perceived depth. This possibility has been largely 
      ignored in previous studies. Here, we evaluated this phenomenon in a VR headset 
      in which the inter-lens and inter-axial camera separations are coupled and 
      adjustable. In a baseline condition, both were matched to observers' IPDs. In two 
      other conditions, the inter-lens and inter-axial camera separations were set to 
      the maximum and minimum allowed by the headset. In each condition, observers were 
      instructed to adjust a fold created by two intersecting, textured surfaces until 
      it appeared to have an angle of 90 degrees . The task was performed at three randomly 
      interleaved viewing distances, monocularly and binocularly. In the monocular 
      condition, observers underestimated the fold angle and there was no effect of 
      viewing distance on their settings. In the binocular conditions, we found that 
      when the lens and camera separation were less than the viewer's IPD, they 
      exhibited compression of perceived slant relative to baseline. The reverse 
      pattern was seen when the lens and camera separation were larger than the 
      viewer's IPD. These results were well explained by a geometric model that 
      considers shifts in convergence due to lens and display misalignment with the 
      eyes, as well as the relative contribution of monocular cues.
FAU - Tong, Jonathan
AU  - Tong J
FAU - Wilcox, Laurie M
AU  - Wilcox LM
FAU - Allison, Robert S
AU  - Allison RS
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20221021
PL  - United States
TA  - IEEE Trans Vis Comput Graph
JT  - IEEE transactions on visualization and computer graphics
JID - 9891704
SB  - IM
MH  - Depth Perception
MH  - Computer Graphics
MH  - *Virtual Reality
MH  - *Smart Glasses
MH  - Pupil
EDAT- 2022/09/02 06:00
MHDA- 2022/10/26 06:00
CRDT- 2022/09/01 14:05
PHST- 2022/09/02 06:00 [pubmed]
PHST- 2022/10/26 06:00 [medline]
PHST- 2022/09/01 14:05 [entrez]
AID - 10.1109/TVCG.2022.3203098 [doi]
PST - ppublish
SO  - IEEE Trans Vis Comput Graph. 2022 Nov;28(11):3759-3766. doi: 
      10.1109/TVCG.2022.3203098. Epub 2022 Oct 21.