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Related Experiment Video

Updated: Jul 7, 2025

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
09:32

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Underwater Structured Light Stripe Center Extraction with Normalized Grayscale Gravity Method.

Shuaishuai Li1,2, Xiang Gao3, Zexiao Xie1,2

  • 1College of Engineering, Ocean University of China, Qingdao 266100, China.

Sensors (Basel, Switzerland)
|December 23, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a novel normalized grayscale gravity method for accurate underwater laser stripe center extraction. The method enhances robustness and self-adaptability, effectively eliminating noise interference in challenging underwater environments.

Keywords:
light stripe center extractionnormalized grayscale gravity methodunderwater measurementunderwater semantic segmentation

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Area of Science:

  • Robotics and Automation
  • Computer Vision
  • Optical Engineering

Background:

  • Underwater laser measurements face challenges due to non-uniform surface reflectance and environmental disturbances.
  • Accurate laser stripe center extraction is crucial for 3D reconstruction and analysis in underwater environments.

Purpose of the Study:

  • To develop a robust method for precise underwater laser stripe center extraction.
  • To address the impact of non-uniform reflectance and environmental disturbances on measurement accuracy.

Main Methods:

  • Building a comprehensive underwater structured light dataset with varying conditions.
  • Comparing state-of-the-art semantic segmentation models, recommending PSPnet.
  • Implementing a normalized grayscale gravity method with enhanced robustness and subpixel accuracy via bilinear interpolation.

Main Results:

  • The proposed normalized grayscale gravity method effectively eliminates noise interference.
  • The method demonstrates good robustness and self-adaptability in diverse underwater conditions.
  • PSPnet is identified as a suitable model for underwater structured light stripe segmentation.

Conclusions:

  • The developed method significantly improves laser stripe center extraction accuracy in underwater settings.
  • The approach offers a reliable solution for challenging underwater optical measurements.
  • The study contributes to advancing underwater 3D sensing technologies.