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    Active polarization imaging enhances underwater resolution in turbid water, with orthogonal detection offering the best results. Circular polarization outperforms linear methods, but effects diminish in clear water.

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    Area of Science:

    • Optics
    • Imaging Science
    • Oceanography

    Background:

    • Active polarization imaging is promising for scattering media like fog and turbid water.
    • Limited research exists on polarization's impact on underwater imaging resolution.

    Purpose of the Study:

    • To investigate the effects of polarization detection on underwater imaging resolution.
    • To evaluate active polarization imaging technology in various water conditions.

    Main Methods:

    • An experimental system was designed to test polarization effects.
    • Modulation transfer function (MTF) was used to quantify resolution at different spatial frequencies.

    Main Results:

    • Orthogonal detection yielded the highest resolution in turbid water.
    • Circular polarization methods showed superior performance over linear polarization.
    • Resolution enhancement was insensitive to polarization angles in low-scattering conditions (clean water).

    Conclusions:

    • Polarization detection significantly impacts underwater imaging resolution, particularly in turbid environments.
    • Specific polarization strategies, like orthogonal and circular, can optimize image clarity.
    • The benefits of polarization imaging are context-dependent, decreasing with water clarity.