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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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Reconstruction method for fringe projection profilometry based on light beams.

Xuexing Li, Zhijiang Zhang, Chen Yang

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    |December 14, 2016
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    Summary

    This study introduces a new 3D reconstruction method for fringe projection profilometry that simplifies calibration. The novel approach achieves high measurement accuracy without needing projector parameters or extensive reference plane setups.

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    Area of Science:

    • Optics
    • Computer Vision
    • Metrology

    Background:

    • Traditional fringe projection profilometry often requires complex projector calibration or numerous reference planes.
    • These conventional methods can be time-consuming and may reduce reconstruction accuracy.

    Purpose of the Study:

    • To develop a novel 3D reconstruction method for fringe projection profilometry that eliminates the need for projector parameters.
    • To simplify the calibration process by requiring only two reference planes.

    Main Methods:

    • A new reconstruction method based on light beams and a subpixel point-to-point map on two reference planes.
    • Utilizing reflected light beams and a camera model to calculate 3D coordinates.
    • Employing bundle adjustment and complementary gray-code phase-shifting for accuracy and stability.

    Main Results:

    • The proposed method successfully reconstructs 3D coordinates without projector parameters.
    • Experimental results demonstrate high accuracy, reaching approximately 0.0454 mm.
    • Qualitative and quantitative comparisons validate the method's performance.

    Conclusions:

    • The novel fringe projection profilometry method offers a simplified and accurate approach to 3D reconstruction.
    • This technique reduces calibration complexity and time, making it more practical for various applications.
    • The method achieves high measurement precision, comparable to or exceeding existing techniques.