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Related Experiment Video

Updated: Jan 19, 2026

A Virtual Machine Platform for Non-Computer Professionals for Using Deep Learning to Classify Biological Sequences of Metagenomic Data
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Real-time 3D shape measurement using 3LCD projection and deep machine learning.

Hieu Nguyen, Nicole Dunne, Hui Li

    Applied Optics
    |September 11, 2019
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a real-time 3D imaging and shape measurement technique using a three-chip liquid-crystal-display (3LCD) projector and deep neural networks (DNNs). The method achieves high accuracy and speed for complex object analysis.

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    Area of Science:

    • Optics
    • Computer Vision
    • Machine Learning

    Background:

    • Real-time, high-accuracy 3D imaging and shape measurement are critical for scientific and engineering applications but remain challenging.
    • Existing fringe-projection techniques often struggle to balance speed and precision.

    Purpose of the Study:

    • To present a novel fringe-projection-based 3D imaging and shape measurement technique.
    • To achieve simultaneous real-time performance and high accuracy using advanced technology.

    Main Methods:

    • Utilizing a three-chip liquid-crystal-display (3LCD) projector to project phase-shifted fringe patterns encoded in RGB color channels.
    • Synchronizing a camera with the 3LCD projector for rapid fringe image capture.
    • Implementing a deep neural network (DNN) for a novel phase determination approach to enhance measurement accuracy.

    Main Results:

    • The proposed system achieves real-time 3D imaging and shape measurement at 25.6 frames per second (fps).
    • A high relative accuracy of 0.012% was obtained.
    • The technique demonstrated effectiveness for multiple complex objects.

    Conclusions:

    • The developed technique successfully integrates fringe projection with deep learning for efficient 3D shape measurement.
    • The system offers a promising solution for advancing scientific and engineering applications requiring fast and precise 3D data acquisition.