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High speed single pixel imaging using a microLED-on-CMOS light projector.

G E Johnstone, J Gray, S Bennett

    Optics Express
    |November 14, 2024
    PubMed
    Summary
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    This study introduces a high-speed single pixel imaging system using a microLED projector, achieving frame rates up to 800 fps. This overcomes limitations of traditional systems, enabling faster and more flexible imaging applications.

    Area of Science:

    • Optics and Photonics
    • Computational Imaging
    • Materials Science

    Background:

    • Single pixel imaging (SPI) systems typically face trade-offs between speed and flexibility.
    • Existing SPI methods often require complex optics or limited hardware pattern sets.
    • High frame-rate operation is crucial for dynamic scene capture.

    Purpose of the Study:

    • To demonstrate a flexible, high frame-rate single pixel imaging system.
    • To leverage a novel microLED projector for enhanced imaging performance.
    • To explore the potential of deep learning-generated patterns for SPI.

    Main Methods:

    • Utilized a newly developed microLED light projector with individually addressable pixels.
    • Implemented Hadamard and Noiselet patterns for image reconstruction.

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  • Generated custom pattern sets using deep learning tools tailored to the microLED projector.
  • Achieved image reconstruction from single-pixel measurements.

    • Main Results:

    • Demonstrated single pixel imaging at pattern frame-rates approaching 400 kfps.
    • Successfully generated 128x128 pixel images at 7.3 fps using standard pattern sets.
    • Achieved nearly 800 fps imaging using deep learning-optimized patterns.
    • The microLED projector enabled faster pattern modulation than traditional devices.

    Conclusions:

    • The microLED-based single pixel imaging system offers unprecedented speed and flexibility.
    • Deep learning-generated patterns significantly enhance SPI performance at high frame rates.
    • This technology paves the way for advanced dynamic imaging applications.