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Related Experiment Video

Updated: Aug 15, 2025

Measuring Spatially- and Directionally-varying Light Scattering from Biological Material
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Locating through dynamic scattering media based on speckle correlations.

Wenjun Zhang, Shuo Zhu, Kaixuan Bai

    Applied Optics
    |January 6, 2023
    PubMed
    Summary
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    This study introduces a novel method for locating targets obscured by dynamic scattering media. The technique utilizes a reference object

    Area of Science:

    • Optical physics
    • Image processing
    • Metrology

    Background:

    • Optical scattering in complex media obscures target images, yielding only speckle patterns.
    • Dynamic scattering media cause rapid temporal decorrelation, complicating target localization.

    Purpose of the Study:

    • To develop a method for locating targets hidden behind dynamic scattering media.
    • To leverage a priori information of a reference object for target detection.

    Main Methods:

    • A target localization method using a known reference object's spatial information.
    • An automatic calibration technique to streamline the locating process.
    • Analysis of factors influencing positioning accuracy.

    Main Results:

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    • The proposed method predicts target position from speckle pattern autocorrelation.
    • Achieved angle and distance deviations within 2.5% for target localization.
    • Enabled single-shot speckle pattern analysis for target detection.

    Conclusions:

    • The developed method effectively locates targets in dynamic scattering conditions.
    • The approach simplifies target localization by using reference object information.
    • Single-shot capability makes it suitable for real-time applications.