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Updated: Jun 7, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
11:34

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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Pulse-width modulation in defocused three-dimensional fringe projection.

Gastón A Ayubi1, Jaime A Ayubi, J Matías Di Martino

  • 1Instituto de Física, Facultad de Ingeniería, J. Herrera y Reissig 565, Montevideo, Uruguay.

Optics Letters
|November 3, 2010
PubMed
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This study introduces a novel method for generating high-quality sinusoidal fringes using slightly defocused binary fringe projection, overcoming projector nonlinearities for accurate 3D shape measurements.

Area of Science:

  • Optics and Photonics
  • 3D Metrology
  • Computer Vision

Background:

  • Accurate 3D shape measurement using fringe projection relies on high-quality sinusoidal fringe patterns.
  • Nonlinear projector responses (gamma problem) degrade fringe quality and measurement accuracy.
  • Existing methods for sinusoidal fringe generation often require complex setups or significant defocusing.

Purpose of the Study:

  • To present a novel and practical technique for generating high-quality sinusoidal fringes.
  • To overcome the limitations of nonlinear projector responses in fringe projection systems.
  • To enable accurate 3D shape measurements with simplified setups.

Main Methods:

  • Utilizing a slightly defocused binary fringe projection technique.

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  • Adapting the pulse-width modulation (PWM) principle for spatial fringe generation.
  • Employing off-the-shelf projectors for implementation.

    • Main Results:

    • Achieved high-quality sinusoidal fringe patterns with minimal defocusing.
    • Successfully compensated for the nonlinear gamma response of projectors.
    • Demonstrated the effectiveness of the method through validation experiments with a commercial projector.

    Conclusions:

    • The proposed method offers a practical and effective solution for generating high-quality sinusoidal fringes.
    • This technique simplifies 3D shape measurement systems by overcoming projector nonlinearities.
    • It provides a robust approach for accurate 3D metrology applications.