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Related Experiment Video

Updated: Jun 22, 2025

Determining 3D Flow Fields via Multi-camera Light Field Imaging
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A Novel Dynamic Light-Section 3D Reconstruction Method for Wide-Range Sensing.

Mengjuan Chen1, Qing Li1, Kohei Shimasaki1

  • 1School of Advanced Science and Technology, Hiroshima University, Higashihiroshima 739-8527, Japan.

Sensors (Basel, Switzerland)
|June 27, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a new synchronized laser scanning method for multi-scale 3D reconstruction. It achieves sub-millimeter accuracy over a wide meter-scale range, overcoming limitations of existing systems.

Keywords:
calibrationdynamic 3D reconstructionlight sectionmulti galvanometers

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Area of Science:

  • Metrology
  • Computer Vision
  • Robotics

Background:

  • Galvanometer-based laser scanning systems struggle with balancing accuracy and range in multi-scale 3D reconstruction.
  • Existing calibration methods for dynamic lasers or cameras have limitations.

Purpose of the Study:

  • To develop a novel method for synchronized laser scanning to achieve high-precision, wide-range multi-scale 3D reconstruction.
  • To establish a comprehensive geometric model and a flexible calibration method for the system.

Main Methods:

  • Synchronized laser scanning using multi-galvanometers to switch camera field-of-view (FOV).
  • Comprehensive geometric modeling of dynamic camera, dynamic laser, and their interaction.
  • Novel high-precision calibration method involving error model construction and objective function minimization.

Main Results:

  • The proposed 3D reconstruction system achieved an accuracy of 0.3 mm.
  • The measurement range was extended to 1100 mm × 1300 mm × 650 mm.
  • Sub-millimeter accuracy was demonstrated for meter-scale reconstruction ranges.

Conclusions:

  • The proposed method enables multi-scale 3D reconstruction.
  • It achieves both high-precision and wide-range 3D reconstruction, suitable for industrial applications.