Infrared and Laser Engineering, Volume. 52, Issue 5, 20220825(2023)

Block-smoothed adaptive fringe projection for measuring high-reflective surface

Xinxin He1, Bin Liu1,2, Chunliu Wang1, and Guanhao Wu2、*
Author Affiliations
  • 1Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems, School of Electrical Engineering and Automation, Tianjin University of Technology, Tianjin 300384, China
  • 2State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China
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    Figures & Tables(15)
    Principle of fringe projection profilometry
    Schematic diagram of saturation region blocking
    Schematic diagram of smoothing the projection intensity and filling the holes based on polynomial fitting
    Flow chart of generating the adaptive fringe patterns
    Setup of the measurement system
    Initial and refined projection intensity maps. (a) Initial projection intensity map; (b) Refined projection intensity map; (c) Comparison of the initial and refined maps at one row
    Hole filling by different methods and the corresponding fringe pattern. (a) Before filling; (b) Median filter; (c) Proposed method; (d)-(f) Fringe patterns corresponding to the above methods are shown respectively
    Comparison of the hole filling results at at one row by using median filter and proposed method
    Comparison of the fringe projection. (a) Conventional FPP; (b) Proposed method
    Comparison of the fringe gray value map at one row
    Experimental results of first group. (a) Fringe projection result of conventional FPP method; (b) Fringe projection result of Chen’s method; (c) Fringe projection result of Zhan’s method; (d) Fringe projection result of proposed method; (e) 3D reconstruction result of conventional FPP method; (f) 3D reconstruction result of Chen’s method; (g) 3D reconstruction result of Zhan’s method; (h) 3D reconstruction result of proposed method; (i) Reconstruction result in the saturated region of conventional FPP method; (j) Reconstruction result in the saturated region of Chen’s method; (k) Reconstruction result in the saturated region of Zhan’s method; (l) Reconstruction result in the saturated region of proposed method; (m) Comparison of measured height on one row of the three methods
    Experimental results of second group. (a) Fringe projection result of conventional FPP method; (b) Fringe projection result of Chen’s method; (c) Fringe projection result of Zhan’s method; (d) Fringe projection result of proposed method; (e) 3D reconstruction result of conventional FPP method; (f) 3D reconstruction result of Chen’s method; (g) 3D reconstruction result of Zhan’s method; (h) 3D reconstruction result of proposed method; (i) Reconstruction result in the saturated region of conventional FPP method; (j) Reconstruction result in the saturated region of Chen’s method; (k) Reconstruction result in the saturated region of Zhan’s method; (l) Reconstruction result in the saturated region of proposed method; (m) Comparison of measured height on one row of the three methods
    3D reconstruction effects of Ru Kiln tea caddy using different methods. (a) Ru Kiln tea caddy; (b) Conventional FPP method; (c) Chen’s method; (d) Zhan’s method; (e) Proposed method
    3D reconstruction results of the metal plane by different methods: (a) Conventional FPP method; (b) Chen’s method; (c) Zhan’s method; (d) Proposed method
    • Table 1. Standard deviation of different methods and the number of images during projection

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      Table 1. Standard deviation of different methods and the number of images during projection

      IMethod
      Chen’sZhan’sProposed
      Std/mm0.250.210.15
      Image/pcs35312
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    Xinxin He, Bin Liu, Chunliu Wang, Guanhao Wu. Block-smoothed adaptive fringe projection for measuring high-reflective surface[J]. Infrared and Laser Engineering, 2023, 52(5): 20220825

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    Paper Information

    Category: Photoelectric measurement

    Received: Jan. 10, 2023

    Accepted: --

    Published Online: Jul. 4, 2023

    The Author Email: Guanhao Wu (guanhaowu@tsinghua.edu.cn)

    DOI:10.3788/IRLA20220825

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