HE Yin-shui, ZHOU Guo-fa, ZHANG Hua, JIANG Jun. Removal of strong arc interference in detection of V-shape weld based on path tracking under water[J]. Journal of Applied Optics, 2009, 30(5): 747-750.
Citation: HE Yin-shui, ZHOU Guo-fa, ZHANG Hua, JIANG Jun. Removal of strong arc interference in detection of V-shape weld based on path tracking under water[J]. Journal of Applied Optics, 2009, 30(5): 747-750.
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Removal of strong arc interference in detection of V-shape weld based on path tracking under water

  • 1.

    Institute of Environment Science and Engineering,Nanchang University,Nanchang 330031,China;

  • 2.

    Institute of Mechanical and Electronic,Nanchang University,Nanchang 330031,China

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  • The algorithm of threshold automatic selection based on fuzzy reasoning for image processing of arc-v-shape weld seam is introduced. The removal method of the strong arc interference is proposed based on path tracking. By designing nine kinds of window templates, and acquiring the maximum average gray value in the region where these templates can cover through column scanning mode to get the vertical positions where the average gray value are maximum, the threshold is obtained through fuzzy reasoning using the maximum gray value and its increment. After that, all of the positions are tracked to find the white spots below the lowest one and above the tiptop one, and then eliminate the disturbances formed by blebs or little strong arcs below the lowest position and upon the tiptop.
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    • References (1)
  • ［1］何银水，张华. 水下焊接中无弧V形焊缝的识别［J］. 焊接，2006，23(2)：39-43.
    HE Yin-shui, ZHANG Hua. The recognition of V-groove welding underwater with no arc［J］. Welding, 2006，23(2)：39-43. (in Chinese with an English abstract)
    ［2］何银水，张华，余卓骅，等. 水下焊接中V形焊缝的识别［J］. 焊接，2007，20(7)：49-52.
    HE Yin-shui, ZHANG Hua, YU Zhuo-hua, et al. Recognition of V-groove welding underwater. Welding, 2007，20(7)：49-52.(in Chinese with an English abstract)
    ［3］杨淑莹. VC++图像处理程序设计［M］. 北京：清华大学出版社，2003.
    YANG Shu-ying. The program design in image processing based on VC++［M］. Beijing: The Press of Qinghua University, 2003.(in Chinese)
    ［4］姚春，李琦，尹奇国，等. THz激光主动图像预处理方法研究［J］.应用光学，2009，30(2):233-235.
    YAO Rui，LI Qi，YIN Qi-guo，et al. Study on preprocessing of THz laser active image［J］. Journal of Applied Optics, 2009，30(2):233-235. (in Chinese with an English abstract)
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