Smart Structures and Systems

  • 제23권4호
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  • Pages.359-371
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  • 2019
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Real-time geometry identification of moving ships by computer vision techniques in bridge area

  • Li, Shunlong (School of Transportation Science and Engineering, Harbin Institute of Technology) ;
  • Guo, Yapeng (School of Transportation Science and Engineering, Harbin Institute of Technology) ;
  • Xu, Yang (School of Civil Engineering, Harbin Institute of Technology) ;
  • Li, Zhonglong (School of Transportation Science and Engineering, Harbin Institute of Technology)
  • 투고 : 2018.09.09
  • 심사 : 2019.03.11
  • 발행 : 2019.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

As part of a structural health monitoring system, the relative geometric relationship between a ship and bridge has been recognized as important for bridge authorities and ship owners to avoid ship-bridge collision. This study proposes a novel computer vision method for the real-time geometric parameter identification of moving ships based on a single shot multibox detector (SSD) by using transfer learning techniques and monocular vision. The identification framework consists of ship detection (coarse scale) and geometric parameter calculation (fine scale) modules. For the ship detection, the SSD, which is a deep learning algorithm, was employed and fine-tuned by ship image samples downloaded from the Internet to obtain the rectangle regions of interest in the coarse scale. Subsequently, for the geometric parameter calculation, an accurate ship contour is created using morphological operations within the saturation channel in hue, saturation, and value color space. Furthermore, a local coordinate system was constructed using projective geometry transformation to calculate the geometric parameters of ships, such as width, length, height, localization, and velocity. The application of the proposed method to in situ video images, obtained from cameras set on the girder of the Wuhan Yangtze River Bridge above the shipping channel, confirmed the efficiency, accuracy, and effectiveness of the proposed method.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China (NSFC)

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