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    This study introduces a 3D deblurring-gated imaging method to improve underwater 3D reconstruction accuracy. The technique effectively reduces noise from water backscatter, enhancing target detection and marine research capabilities.

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    Area of Science:

    • Optics
    • Marine Technology
    • Image Processing

    Background:

    • Three-dimensional (3D) range-gated imaging offers advantages in underwater applications like target detection and navigation by suppressing backscatter.
    • However, turbid water conditions introduce significant backscatter, degrading range resolution and 3D reconstruction accuracy.

    Purpose of the Study:

    • To propose and validate a novel 3D deblurring-gated range-intensity correlation imaging method.
    • To enhance the range resolution and accuracy of 3D underwater imaging in turbid environments.

    Main Methods:

    • A 3D deblurring-gated range-intensity correlation imaging method was developed, leveraging light propagation properties in water.
    • The method calculates depth-noise maps (DNM) using the water attenuation coefficient and a reference image.
    • DNMs are subtracted from target gate images to reduce noise, followed by 3D image reconstruction.

    Main Results:

    • Experiments demonstrated the method's feasibility in various water conditions.
    • The new gated images achieved a peak signal-to-noise ratio improvement of approximately 9 dB.
    • Reconstructed 3D images exhibited high range resolution and accuracy.

    Conclusions:

    • The proposed 3D deblurring-gated imaging method effectively mitigates noise caused by water backscatter.
    • This technique significantly improves the quality of 3D underwater reconstructions, benefiting target detection and marine research.