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Experimental study of temporal-spatial binary pattern projection for 3D shape acquisition.

Pei Zhou, Jiangping Zhu, Xianyu Su

    Applied Optics
    |April 18, 2017
    PubMed
    Summary
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    A new binary encoding method improves three-dimensional (3D) object acquisition by overcoming limitations in digital fringe projection systems. This technique offers comparable performance to sinusoidal fringe projection with advantages over spatial binary methods.

    Area of Science:

    • Optics
    • 3D Metrology
    • Computer Vision

    Background:

    • Digital fringe projection for 3D acquisition faces challenges with projector nonlinearity and low switching rates.
    • Existing methods like spatial binary encoding have limitations in accuracy and speed.
    • Sinusoidal fringe patterns are ideal but difficult to generate with standard projectors.

    Purpose of the Study:

    • To present a novel binary encoding method for generating sinusoidal fringe patterns.
    • To analyze the mechanism of sinusoid generation using a physical model.
    • To compare the phase accuracy and measurement accuracy of the proposed method against conventional techniques.

    Main Methods:

    • Developing a binary encoding strategy for computer-generated sinusoidal fringe patterns.

    Related Experiment Videos

  • Constructing a physical model to elucidate sinusoid generation.
  • Conducting simulations and experiments to evaluate phase accuracy.
  • Comparing measurement accuracy using two phase-height mapping relationships.

    • Main Results:

    • The proposed binary encoding method achieves good sinusoidality.
    • Phase accuracy is comparable to sinusoidal fringe projection and superior to spatial binary encoding.
    • Experimental results demonstrate comparable performance to sinusoidal fringe projection under identical conditions.
    • The binary encoding strategy shows advantages over the spatial binary method.

    Conclusions:

    • The presented binary encoding method effectively circumvents deficiencies in digital fringe projection.
    • This approach offers a practical solution for accurate and efficient 3D object acquisition.
    • The method provides a viable alternative to traditional sinusoidal fringe projection with improved performance over spatial binary encoding.