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Motion-deblurring ghost imaging for an axially moving target.

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    Area of Science:

    • Optics and Photonics
    • Image Processing

    Background:

    • Lensless ghost imaging (GI) with thermal light suffers from image blurring due to axial motion and variable magnification.
    • Axial motion within the depth of focus (DOF) can degrade resolution in conventional GI systems.

    Purpose of the Study:

    • To develop a motion-deblurring GI system capable of overcoming resolution degradation caused by axial motion.
    • To enable high-resolution GI without requiring prior motion estimation information.

    Main Methods:

    • Proposed a novel ghost imaging system utilizing pseudo-thermal light.
    • Investigated the impact of axial motion and system DOF on image resolution.
    • Optimized the geometrical shape of the laser spot on the rotating ground glass disk (RGGD) to extend DOF.

    Main Results:

    • Demonstrated that high-resolution GI is achievable as long as the target's random motion range is within the system's DOF.
    • Analytical and experimental results confirmed the system's effectiveness in deblurring images affected by axial motion.
    • Showcased the ability to extend the system's DOF through RGGD laser spot optimization.

    Conclusions:

    • The proposed motion-deblurring GI system effectively overcomes resolution degradation from axial motion.
    • This technique enhances the practical application of GI for moving-target detection and recognition.
    • The system provides high-resolution imaging without prior motion estimation, simplifying practical implementation.