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Related Experiment Video

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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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Graphics processing unit-assisted real-time three-dimensional measurement using speckle-embedded fringe.

Shijie Feng, Qian Chen, Chao Zuo

    Applied Optics
    |September 15, 2015
    PubMed
    Summary

    This study introduces a two-frame fringe projection technique for fast and precise 3D measurements. It accurately measures discontinuous surfaces in dynamic scenes using a novel pattern for unambiguous phase unwrapping.

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    Area of Science:

    • Optical Metrology
    • 3D Reconstruction
    • Digital Image Processing

    Background:

    • Traditional fringe projection techniques often require multiple frames, increasing sensitivity to motion and limiting applications in dynamic scenes.
    • Accurate 3D measurement of discontinuous surfaces remains a challenge for many existing methods.

    Purpose of the Study:

    • To develop a novel two-frame fringe projection technique for real-time, accurate, and unambiguous 3D measurement.
    • To enable 3D measurement of discontinuous surfaces with reduced sensitivity to movement.
    • To accelerate data processing for real-time applications.

    Main Methods:

    • A two-frame technique using a digital speckle pattern and a composite image with sinusoidal fringes.
    • Fourier transform profilometry for wrapped phase map generation.
    • Speckle image analysis for phase unwrapping and fringe order determination.
    • Graphics Processing Unit (GPU) acceleration using Compute Unified Device Architecture (CUDA).

    Main Results:

    • Achieved real-time 3D measurements at 21 frames per second with 307,000 points per frame.
    • Demonstrated accurate and unambiguous 3D measurement of discontinuous surfaces using only two frames.
    • Exhibited measurement accuracy comparable to the phase-shifting method.

    Conclusions:

    • The proposed two-frame fringe projection technique offers a significant advancement for real-time 3D measurement, especially for dynamic scenes and discontinuous surfaces.
    • The method reduces the number of required patterns and enhances robustness against motion.
    • GPU acceleration enables efficient processing for practical, high-speed applications.