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Three-dimensional profilometry based on coded linear-structure light with isosceles triangle teeth.

L Meng1, F Qiang

  • 1Department of Electric and Telecommunication Engineering, Xi'an Institute of Posts Telecommunications, 710061 Xi'an, Shaanxi, China. focr@xiyou.edu.cn

Applied Optics
|March 8, 2008
PubMed
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A novel linearly coded profilometry method uses structured light and phase-shifting for accurate 3D object profiling. This technique enhances noise reduction for reliable measurements, demonstrated on a head model.

Area of Science:

  • Optical Metrology
  • 3D Imaging
  • Computer Vision

Background:

  • Profilometry is crucial for 3D surface measurement.
  • Existing methods face challenges with noise and accuracy.
  • Structured light techniques offer potential for enhanced 3D reconstruction.

Purpose of the Study:

  • To propose a new linearly coded profilometry method.
  • To enhance accuracy and noise reduction in 3D profiling.
  • To validate the method with experimental results.

Main Methods:

  • Utilizes linear-structure light with isosceles triangle teeth for object coding.
  • Employs a phase-shifting technique for profile decoding.
  • Applies the least-squares method with more than three samples for noise reduction.

Related Experiment Videos

Main Results:

  • General formulas for decoded phase are derived.
  • Experimental validation performed on a head model.
  • Demonstrated effective 3D profile reconstruction with reduced noise.

Conclusions:

  • The proposed linearly coded profilometry method is effective.
  • The technique offers improved accuracy and robustness against noise.
  • Successful application to complex object reconstruction.