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Toward omnidirectional and automated imaging system for measuring oceanic whitecap coverage.

Raied S Al-Lashi

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
    |August 10, 2016
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    Summary

    Researchers developed a novel high-resolution optical instrument to accurately measure oceanic whitecap coverage. This advancement aids understanding of air-gas transfer and aerosol production by overcoming imaging challenges in open ocean conditions.

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    Area of Science:

    • Oceanography
    • Atmospheric Science
    • Optical Instrumentation

    Background:

    • Accurate oceanic whitecap coverage measurements are crucial for understanding air-gas transfer and aerosol production.
    • Existing methods face challenges due to the transient nature of whitecaps and wide area coverage.
    • Instrument design challenges include limited field of view, large data volumes, long-term recording, and harsh deployment conditions.

    Purpose of the Study:

    • To describe the hardware design of a novel high-resolution optical instrument for imaging oceanic whitecaps.
    • To present an automated algorithm for processing the collected whitecap images.
    • To address the challenges in obtaining accurate whitecap coverage data.

    Main Methods:

    • Development of a novel high-resolution optical instrument.
    • Utilized a fish-eye camera lens for a wide 180° field of view.
    • Designed an automated algorithm for image processing.
    • Successful deployment during the HiWINGS campaign in the North Atlantic Ocean in 2013.

    Main Results:

    • The instrument successfully captured high-resolution images of oceanic whitecaps.
    • The wide-angle lens effectively covered a large area, addressing a key challenge.
    • The automated algorithm enabled efficient processing of image data.

    Conclusions:

    • The novel instrument and algorithm provide a viable solution for accurate oceanic whitecap coverage measurements.
    • This technology facilitates improved understanding of air-sea interactions, including gas transfer and aerosol formation.
    • The successful deployment demonstrates the instrument's capability in challenging marine environments.