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Related Experiment Video

Updated: Jun 5, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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Optimal pulse width modulation for sinusoidal fringe generation with projector defocusing.

Yajun Wang1, Song Zhang

  • 1Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, USA.

Optics Letters
|December 18, 2010
PubMed
Summary
This summary is machine-generated.

This study enhances 3D shape measurement by improving sinusoidal fringe pattern generation. A new method filters harmonics from binary patterns, enabling high-quality measurements even with wide fringe stripes.

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Computer Vision

Background:

  • Simplified 3D shape measurement systems utilize defocused binary fringe patterns to generate sinusoidal ones.
  • This technique's effectiveness diminishes with wide fringe stripes, hindering high-quality measurements.

Purpose of the Study:

  • To improve the generation of sinusoidal fringe patterns from binary patterns for 3D shape measurement.
  • To enable high-quality measurements even with wide fringe stripes using a simplified defocusing technique.

Main Methods:

  • A novel method selectively eliminates high-frequency harmonics from squared binary patterns.
  • This process refines the fringe patterns generated through defocusing.

Main Results:

  • The proposed technique successfully generates improved sinusoidal fringe patterns.
  • High-quality measurements are achievable with a small degree of defocusing, even for wide fringe stripes.

Conclusions:

  • The developed method enhances the robustness and applicability of fringe projection techniques for 3D shape measurement.
  • This advancement simplifies system development and improves measurement speed and quality, particularly for challenging wide fringe patterns.