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Localization and coherent imaging of hidden moving objects using laser speckle.

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    Area of Science:

    • Optics and Photonics
    • Biomedical Imaging
    • Environmental Sensing

    Background:

    • Imaging through scattering media is difficult for applications like environmental sensing and biomedical imaging.
    • Previous work used speckle correlations for moving object imaging through scattering media.

    Purpose of the Study:

    • To combine speckle correlation imaging with localization for object imaging without prior motion knowledge.
    • To extend the application of scattering media imaging beyond thin or weakly scattering regimes.

    Main Methods:

    • Utilized correlations of speckle images based on object spatial translation.
    • Integrated localization with the speckle correlation technique.
    • Demonstrated effectiveness in thick, heavily scattering random media.

    Main Results:

    • Achieved coherent imaging of moving objects through substantial scattering.
    • Enabled imaging without prior knowledge of the object's motion.
    • Successfully exploited moving object information for enhanced imaging.

    Conclusions:

    • The combined technique significantly extends the application domain for imaging through scattering media.
    • Motion, previously a hindrance, is now leveraged as an information source.
    • The method is robust for complex environments and biological tissues.