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Adams H, Stefanucci J, Creem-Regehr SH, et al. Shedding Light on Cast Shadows: An Investigation of Perceived Ground Contact in AR and VR. IEEE Trans Vis Comput Graph. 2021;doi: 10.1109/TVCG.2021.3097978.
Adams, H., Stefanucci, J., Creem-Regehr, S. H., Pointon, G., Thompson, W. B., & Bodenheimer, B. (2021). Shedding Light on Cast Shadows: An Investigation of Perceived Ground Contact in AR and VR. IEEE transactions on visualization and computer graphics, . https://doi.org/10.1109/TVCG.2021.3097978
Adams, Haley, et al. "Shedding Light on Cast Shadows: An Investigation of Perceived Ground Contact in AR and VR." IEEE transactions on visualization and computer graphics vol. (2021). doi: https://doi.org/10.1109/TVCG.2021.3097978
Adams H, Stefanucci J, Creem-Regehr SH, Pointon G, Thompson WB, Bodenheimer B. Shedding Light on Cast Shadows: An Investigation of Perceived Ground Contact in AR and VR. IEEE Trans Vis Comput Graph. 2021 Jul 19; doi: 10.1109/TVCG.2021.3097978. Epub 2021 Jul 19. PMID: 34280102.
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IEEE Trans Vis Comput Graph. 2021 Jul 19; doi: 10.1109/TVCG.2021.3097978. Epub 2021 Jul 19.

Shedding Light on Cast Shadows: An Investigation of Perceived Ground Contact in AR and VR.

IEEE transactions on visualization and computer graphics

Haley Adams, Jeanine Stefanucci, Sarah H Creem-Regehr, Grant Pointon, William B Thompson, Bobby Bodenheimer

PMID: 34280102 DOI: 10.1109/TVCG.2021.3097978

Abstract

Virtual objects in augmented reality (AR) often appear to float atop real world surfaces, which makes it difficult to determine where they are positioned in space. This is problematic as many applications for AR require accurate spatial perception. In the current study, we examine how the way we render cast shadows--which act as an important monocular depth cue for creating a sense of contact between an object and the surface beneath it--impacts spatial perception. Over two experiments, we evaluate people's sense of surface contact given both traditional and non-traditional shadow shading methods in optical see-through augmented reality (OST AR), video see-through augmented reality (VST AR), and virtual reality (VR) head-mounted displays. Our results provide evidence that nontraditional shading techniques for rendering shadows in AR displays may enhance the accuracy of one's perception of surface contact. This finding implies a possible tradeoff between photorealism and accuracy of depth perception, especially in OST AR displays. However, it also supports the use of more stylized graphics like non-traditional cast shadows to improve perception and interaction in AR applications.

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