Chinese Journal of Liquid Crystals and Displays, Volume. 40, Issue 5, 796(2025)

Full-surface imaging of rotary workpieces based on adaptive brightness correction

Bin LIU1, Qian LIU2、*, Weiwei MING1, and Xiaojin HUANG2
Author Affiliations
  • 1School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
  • 2Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Chengdu 610200,China
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    Figures & Tables(14)
    Full-surface imaging of gold-coated rotary workpieces based on adaptive brightness correction
    Brightness distribution of rotary workpiece images
    Brightness mapping function with different z values
    Abnormal color spots in low brightness areas
    Effects of guided filtering and Gaussian filtering
    Cylindrical image flattening diagram
    Experimental subjects and environment
    Brightness correction effect of different workpieces
    Effect of different ROI widths on stitching
    Comparison of stitched images with various algorithms.(a)Input images;(b)Autostitch algorithm;(c)AANAP algorithm;(d)LPC algorithm;(e)Proposed algorithm.
    Full-surface grayscale image of gold-plated rotary workpieces
    • Table 1. Impact of brightness correction on SIFT feature

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      Table 1. Impact of brightness correction on SIFT feature

      评价指标原始图像亮度校正后
      特征点数量4001 033
      匹配点对数量32122
      内点数量1241
      平均反向投影误差1.5730.727
    • Table 2. Evaluation of stitching quality of different algorithms

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      Table 2. Evaluation of stitching quality of different algorithms

      MethodsPSNR/dBSSIM
      Autostitch26.30.721
      AANAP28.10.845
      LPC30.40.782
      Proposed32.70.902
    • Table 3. Computation times of different stitching algorithms

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      Table 3. Computation times of different stitching algorithms

      方法耗时/s
      工件1工件2工件 3平均
      Autostitch43.141.837.440.8
      AANAP347.5330.4300.2326.0
      LPC168.3150.489.6136.1
      Proposed8.58.38.18.3
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    Bin LIU, Qian LIU, Weiwei MING, Xiaojin HUANG. Full-surface imaging of rotary workpieces based on adaptive brightness correction[J]. Chinese Journal of Liquid Crystals and Displays, 2025, 40(5): 796

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    Paper Information

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    Received: Oct. 28, 2024

    Accepted: --

    Published Online: Jun. 18, 2025

    The Author Email: Qian LIU (liuqianblue@126.com)

    DOI:10.37188/CJLCD.2024-0314

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