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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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Related Experiment Video

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Ambient light robust gamut mapping for optical see-through displays.

Kang-Kyu Lee, Jae-Woo Kim, Je-Ho Ryu

    Optics Express
    |May 15, 2020
    PubMed
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    This study introduces a new gamut mapping method for optical see-through (OST) displays to reduce color distortion in bright ambient light. The method improves color reproduction quality compared to existing algorithms.

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    Area of Science:

    • Optics and Photonics
    • Computer Vision and Image Processing

    Background:

    • Optical see-through (OST) displays suffer significant color distortion in bright outdoor light due to transparency.
    • Existing gamut mapping methods are unsuitable for OST displays owing to their unique gamut characteristics and ambient light interference.

    Purpose of the Study:

    • To propose a novel robust gamut mapping method for OST displays that effectively mitigates ambient light effects.
    • To enhance color reproduction accuracy and minimize distortion in visually demanding outdoor environments.

    Main Methods:

    • A two-step process involving lightness mapping (LM) and chroma reproduction.
    • LM aligns sRGB lightness with OST gamut, partitioning OST gamut regions based on sRGB size and lightness.
    • Chroma reproduction selects appropriate methods (compression/extension) and directions based on regional characteristics to counter ambient light.

    Main Results:

    • The proposed method significantly reduces color distortion in OST displays under bright ambient light.
    • Qualitative and quantitative evaluations confirm superior color reproduction compared to existing parametric algorithms.
    • Experimental validation demonstrates the robustness and effectiveness of the new approach.

    Conclusions:

    • The developed gamut mapping method offers a significant improvement for OST display color fidelity in bright conditions.
    • This addresses a critical limitation of OST displays, expanding their usability in outdoor applications.
    • The findings pave the way for more accurate and visually pleasing OST display experiences.