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Cue vetoing in depth estimation: Physical and virtual stimuli.
Brittney Hartle1, Laurie M Wilcox1
1Department of Psychology and Centre for Vision Research, York University, Canada.
Vision Research
|July 21, 2021
Summary
Perceived depth in 3D objects is similar for physical and virtual displays. A veto model, excluding less reliable motion parallax, best explains depth cue integration, outperforming linear combinations.
Area of Science:
- Visual perception
- Human-computer interaction
- 3D display technology
Background:
- Depth perception relies on cues like motion parallax and binocular disparity.
- Computerized displays can introduce conflicts affecting depth misperception.
- Understanding cue integration is crucial for realistic virtual experiences.
Purpose of the Study:
- To evaluate the impact of display-based cue conflicts on depth cue integration.
- To compare perceived depth for physical and virtual 3D objects.
- To investigate models of depth cue combination.
Main Methods:
- Truncated square pyramids were 3D printed and rendered virtually.
- Perceived depth was assessed using a discrimination task with motion parallax and binocular disparity.
- Virtual stimuli were viewed via head-mounted display; physical stimuli used controlled lighting.
Main Results:
- Perceived depth accuracy was comparable for virtual and physical stimuli.
- Binocular disparity yielded more precise depth estimates than motion parallax.
- A linear combination model failed to predict performance; a veto model was superior.
Conclusions:
- Depth cue integration in 3D displays is influenced by display-specific factors.
- A veto model, prioritizing reliable cues, better explains human depth perception than linear summation.
- Findings inform the design of more accurate virtual reality systems.
