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Underwater High-Precision 3D Reconstruction System Based on Rotating Scanning.

Qingsheng Xue1, Qian Sun1, Fupeng Wang1

  • 1College of Information Science and Engineering, Ocean University of China, Qingdao 266100, Shandong, China.

Sensors (Basel, Switzerland)
|March 6, 2021
PubMed
Summary

This study introduces an underwater 3D laser scanning system for precise data acquisition. Refraction compensation ensures high accuracy, achieving less than 0.6 mm error for underwater 3D reconstruction.

Keywords:
3D reconstructionhigh precisionlaser sensorunderwater laser scanning

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Area of Science:

  • Marine technology
  • Optical engineering
  • Robotics

Background:

  • Underwater 3D scanning is crucial for marine research and inspection.
  • Existing systems face challenges with refraction and low-light conditions.
  • High-precision 3D reconstruction requires robust optical and algorithmic solutions.

Purpose of the Study:

  • To develop and validate a high-precision underwater line laser 3D scanning system.
  • To implement and assess a refraction compensation algorithm for improved accuracy.
  • To demonstrate the system's effectiveness in diverse underwater environments.

Main Methods:

  • Utilized a rotary scanning mode with a low-illumination camera and green line laser projector.
  • Developed a refraction compensation algorithm to correct optical distortions.
  • Conducted error experiments using a standard sphere for validation.

Main Results:

  • Achieved underwater 3D reconstruction with an error of less than 0.6 mm.
  • System operates effectively within a working distance of 140 mm to 2500 mm.
  • Demonstrated successful 3D data acquisition across a 50° vertical and 360° horizontal field of view.

Conclusions:

  • The developed underwater 3D laser scanning system meets design requirements for high-precision reconstruction.
  • The refraction compensation algorithm significantly reduces errors caused by light refraction.
  • The system offers a low-cost solution for underwater 3D scanning applications.