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Brightness matching in optical see-through augmented reality.

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    |December 28, 2020
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    Augmented reality (AR) overlays need more brightness when oversized to appear realistic. This research introduces a new AR model for better virtual object integration with the real world.

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    Area of Science:

    • Human-Computer Interaction
    • Computer Vision
    • Perception Science

    Background:

    • Optical see-through augmented reality (OST-AR) systems blend virtual overlays with physical environments.
    • Accurate visual integration of AR overlays is crucial for user experience and task performance.
    • Existing color appearance models do not fully explain AR overlay perception.

    Purpose of the Study:

    • To investigate the impact of AR overlay size and alignment on perceived brightness.
    • To develop a perceptual model for AR overlay integration with real-world objects.
    • To identify parameters for enhancing the realism of AR visualizations.

    Main Methods:

    • A visual experiment was conducted using a beam-splitter-based OST-AR setup.
    • Participants performed a brightness-matching task with physical cubes and AR overlays.
    • The experiment manipulated the size and alignment of virtual AR overlays relative to physical objects.

    Main Results:

    • Increased luminance was required for oversized AR overlays to match perceived brightness.
    • Observers discounted oversized AR overlays more significantly, indicating a greater perception of transparency.
    • Findings suggest a foreground-background discounting mechanism specific to AR environments.

    Conclusions:

    • Conventional color appearance models are insufficient for explaining AR overlay perception.
    • A novel AR-specific model based on foreground-background discounting is supported.
    • The study provides insights for designing more convincing AR experiences by optimizing overlay parameters.