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Related Experiment Video

Updated: Nov 18, 2025

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3D surface reconstruction of small height object based on thin structured light scanning.

Jinghui Liu1, Yuezong Wang2

  • 1Institute of Disaster Prevention, SanHe, HeBei, 065201, China.

Micron (Oxford, England : 1993)
|February 7, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel structured light profilometry method for 3D surface reconstruction of small height objects. The technique enhances image quality and accurately captures fine surface details, achieving high consistency with real object shapes.

Keywords:
3D shape reconstructionFringe pattern analysisMicroscopic visionOptical profilometrySmall scale reconstruction

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Area of Science:

  • Optics and Photonics
  • Computer Vision
  • Metrology

Background:

  • 3D surface reconstruction of small height objects presents challenges.
  • Existing methods may struggle with fine details and image quality issues like 'cracking' and uneven brightness.

Purpose of the Study:

  • To propose and validate a new structured light profilometry method for accurate 3D surface reconstruction of micro-scale objects.
  • To address image quality limitations in microscopic fringe imaging.

Main Methods:

  • A structured light profilometry system integrating a laser, stereo light microscope, and two cameras was developed.
  • Image fusion techniques were employed to improve fringe image quality by capturing sequences under varied camera exposure parameters.
  • Loess local fitting methods (second-order and linear) were used for precise laser stripe center detection, smoothing, and prediction.
  • 3D surface reconstruction was achieved by calculating laser stripe center curve deformation in image space.

Main Results:

  • The proposed method successfully reconstructed the 3D surfaces of small characters on Chinese coins and human hair.
  • The reconstructed 3D surface shapes demonstrated high consistency with the actual object geometries.
  • Image fusion effectively mitigated 'cracking' and uneven brightness issues in microscopic fringe images.

Conclusions:

  • The developed structured light profilometry method is highly suitable for 3D surface reconstruction of small height objects.
  • The technique offers an effective solution for capturing high-fidelity 3D surface data at the micro-scale.
  • Accurate and detailed 3D surface reconstruction is achievable for challenging samples like micro-characters and hair fibers.