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    This study introduces a dynamic projection mapping system that overcomes depth-of-field limitations. It enables real-time, focused augmented reality projections on moving 3D objects.

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    Area of Science:

    • Computer Vision
    • Optics
    • Human-Computer Interaction

    Background:

    • Dynamic projection mapping offers interactive augmented reality experiences for multiple users.
    • Existing systems are limited by fixed, shallow depth-of-field in projector optics.
    • This restricts applications involving 3D or moving objects.

    Purpose of the Study:

    • To develop a high-speed projection mapping method with dynamic focal tracking.
    • To overcome the depth-of-field limitations of current projection technologies.
    • To enable real-time, focused projections on dynamic 3D surfaces.

    Main Methods:

    • Implemented a system using a high-speed variable focus lens, camera, and projector.
    • Integrated real-time detection of depth and rotation information.
    • Utilized feedback to dynamically adjust focal length and projection parameters.

    Main Results:

    • Achieved well-focused projections on 3D dynamic moving objects.
    • Demonstrated a prototype with a response speed of approximately 5 milliseconds.
    • Covered a dynamic projection range from 0.5 to 2.0 meters.

    Conclusions:

    • The proposed system successfully enables dynamic focal tracking for projection mapping.
    • High-speed, real-time adjustments allow for clear projections on complex surfaces.
    • This technology significantly expands the potential applications of augmented reality projection mapping.