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Underwater De-scattering Range-Gated Imaging Based on Numerical Fitting and Frequency Domain Filtering

  • Minmin Wang
  • Xinwei WangEmail author
  • Yuqing Yang
  • Liang Sun
  • Yan Zhou
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11741)

Abstract

One of the major challenges of underwater imaging is its sensitivity to water scattering. In this paper, a method of underwater de-scattering range-gated imaging based on numerical fitting and frequency domain filtering is developed to suppress scatter effect and improve image quality. The backscatter noise is eliminated by using its numerical fitting value after measuring a sequence of water scattering maps. The Jaffe-McGlamery computer model and the light propagation property in water are introduced, and forward-scatter noise is reduced by filtering process in the frequency domain. After removing the backscatter and forward-scatter noise, the resolution and contrast of gated images are improved. A range-gated imaging system is established, and experiments are conducted in pools to prove the effectiveness and superiority of the proposed method. Compared with traditional range-gated imaging, the results demonstrate that the proposed method increases the image entropy by about 69%. The research is beneficial for enhancing underwater range-gated active imaging.

Keywords

Underwater range-gated imaging Laser imaging Water scattering Forward scatter Backscatter Image enhancement 

Notes

Funding

The authors acknowledge the financial funding of this work by the National Key Research and Development Program of China (Grant 2016YFC0302503), the National Natural Science Foundation of China (NSFC) (Grant 61875189), and the Youth Innovation Promotion Association CAS (No. 2017155), the Strategic Priority Program of the Chinese Academy of Sciences (No. XDC03060102).

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Minmin Wang
    • 1
    • 2
  • Xinwei Wang
    • 1
    • 2
    • 3
    Email author
  • Yuqing Yang
    • 1
    • 2
  • Liang Sun
    • 1
  • Yan Zhou
    • 1
    • 2
    • 3
  1. 1.Optoelectronic System LaboratoryInstitute of Semiconductors, CASBeijingChina
  2. 2.College of Materials Science and Opto-Electronics TechnologyUniversity of Chinese Academy of SciencesBeijingChina
  3. 3.School of Electronic, Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijingChina

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