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Multiplexed coherent optical processor for calculating generalized moments.

J A Blodgett, R A Athale, C L Giles

    Optics Letters
    |August 28, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel coherent optical processor for calculating generalized moments of 2D patterns. It utilizes spatial-frequency multiplexing and computer-generated holography for flexible, parallel moment computation.

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    Area of Science:

    • Optics and Photonics
    • Image Processing
    • Computer Vision

    Background:

    • Calculating moments of 2D patterns is crucial for image analysis and pattern recognition.
    • Existing methods may lack flexibility or parallel processing capabilities.

    Purpose of the Study:

    • To describe a coherent optical processor for generalized moment calculation.
    • To demonstrate parallel computation of multiple moments using spatial-frequency multiplexing.

    Main Methods:

    • Development of a coherent optical processor architecture.
    • Implementation of a spatial-frequency multiplexing scheme.
    • Utilization of computer-generated holographic masks for flexible moment-generating functions.

    Main Results:

    • Demonstrated parallel computation of five geometric moments (x, y, xy, x^2, y^2).
    • Showcased flexibility in choosing complex or weighted moment-generating functions.
    • Experimental validation for simple objects.

    Conclusions:

    • The proposed coherent optical processor offers a flexible and parallel approach to calculating generalized moments.
    • The system's features and space-bandwidth requirements are analyzed.