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Updated: Dec 14, 2025

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Stray light correction for medium wave infrared focal plane array-based compressive imaging.

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    Stray light in medium wave infrared (MWIR) focal plane array (FPA) compressive imaging (CI) causes artifacts. A novel digital micro-mirror device method corrects stray light, improving image contrast and reducing blockiness in MWIR FPA CI systems.

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    Area of Science:

    • Optics and Photonics
    • Image Processing
    • Infrared Technology

    Background:

    • Focal plane array (FPA)-based compressive imaging (CI) enables high-resolution medium wave infrared (MWIR) image reconstruction from low-resolution sensors.
    • Stray light is an inherent issue in MWIR FPA CI systems, degrading image quality by reducing contrast and introducing blocky artifacts.

    Purpose of the Study:

    • To investigate the sources and impact of stray light in MWIR FPA CI systems.
    • To develop and validate a method for correcting stray light effects to enhance reconstructed image quality.

    Main Methods:

    • Modified the systematic radiation model to analyze stray light effects on compressive measurements.
    • Implemented a digital micro-mirror device (DMD) modulation technique for stray light correction.
    • Experimental validation using an actual MWIR FPA CI system.

    Main Results:

    • Demonstrated that stray light impedes accurate sampling, leading to blocky artifacts in reconstructed images.
    • The proposed DMD-based method significantly improved image contrast.
    • The method effectively reduced blocky structural artifacts without substantial increases in acquisition or computation costs.

    Conclusions:

    • The developed stray light correction method is effective and practical for MWIR FPA CI systems.
    • This technique offers a viable solution for enhancing the quality of reconstructed MWIR images affected by stray light.