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Laser & Optoelectronics Progress, Volume. 56, Issue 7, 071201(2019)

Extraction Method of Line-Structured Light Stripe Center Based on Gauss-Lorenz Decomposition Peak Fitting

Taotao Li1,2、*, Feng Yang2, Shigeng Li1, and Yu He1
Author Affiliations
  • 1 College of Mechanical and Electronic Engineering, Pingxiang University, Pingxiang, Jiangxi 337055, China
  • 2 State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology (Beijing), Beijing 100083, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    References (22)
    Cited By (14)
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    Figures & Tables(14)
    Images of line-structured light stripes. (a) Approximately ideal reflection stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

    Fig. 1. Images of line-structured light stripes. (a) Approximately ideal reflection stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

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    Cross-sectional gray distributions at marked positions. (a) Sa; (b) Sb; (c) Sc; (d) Sd

    Fig. 2. Cross-sectional gray distributions at marked positions. (a) Sa; (b) Sb; (c) Sc; (d) Sd

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    Results of single Gaussian fitting. (a) Approximately ideal light stripe; (b) strong specular reflection stripe

    Fig. 3. Results of single Gaussian fitting. (a) Approximately ideal light stripe; (b) strong specular reflection stripe

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    Distribution curves of Gaussian and Lorentz components

    Fig. 4. Distribution curves of Gaussian and Lorentz components

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    Flow chart of light stripe center extraction process based on G-L decomposition peak fitting

    Fig. 5. Flow chart of light stripe center extraction process based on G-L decomposition peak fitting

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    Normalization of weak reflection light stripe image. (a) Before normalization; (b) after normalization

    Fig. 6. Normalization of weak reflection light stripe image. (a) Before normalization; (b) after normalization

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    Extraction of light stripe ROI. (a) Original image; (b) after Otsu initial extraction; (c) after removal of interference regions

    Fig. 7. Extraction of light stripe ROI. (a) Original image; (b) after Otsu initial extraction; (c) after removal of interference regions

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    G-L fitting results of various types of light stripes. (a) Approximately ideal light stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

    Fig. 8. G-L fitting results of various types of light stripes. (a) Approximately ideal light stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

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    Four types of light stripe images used in contrast experiment. (a) Approximately ideal light stripe;(b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

    Fig. 9. Four types of light stripe images used in contrast experiment. (a) Approximately ideal light stripe;(b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

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    Extraction results of light stripe centers. (a) Approximately ideal light stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

    Fig. 10. Extraction results of light stripe centers. (a) Approximately ideal light stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

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    Reliability evaluation results of light stripe centers. (a) Approximately ideal light stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

    Fig. 11. Reliability evaluation results of light stripe centers. (a) Approximately ideal light stripe; (b) strong diffuse reflection stripe; (c) strong specular reflection stripe; (d) weak reflection stripe

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    Time consumption comparison of extraction

    Fig. 12. Time consumption comparison of extraction

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    • Table 1. λ and Q(x) in energy model

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      Table 1. λ and Q(x) in energy model

      ItemIdeal reflection stripeDiffuse reflection stripeSpecular reflection stripeWeak reflection stripe
      λλ=1λ>1λ>1λ<1
      Q(x)Q(x)≪λG0(x),Q(x)is negligibleQ(x)<λG0(x),Q(x)has effect on f(x)Q(x)<λG0(x),Q(x)has great effect on f(x)Q(x)≪λG0(x),Q(x)is negligibl

    • Table 2. Statistics of average confidence

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      Table 2. Statistics of average confidence

      MethodAverage confidence of extracted centers Ca
      Approximately ideal light stripeStrong diffuse reflection stripeStrong specular reflection stripeWeak reflection stripe
      Method 11372.154903.023592.5189.08
      Method 21332.155041.374401192.15
      Method 31394.655550.823588.93271.15
      Method 41407.356521.384685275.13
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    Taotao Li, Feng Yang, Shigeng Li, Yu He. Extraction Method of Line-Structured Light Stripe Center Based on Gauss-Lorenz Decomposition Peak Fitting[J]. Laser & Optoelectronics Progress, 2019, 56(7): 071201

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Sep. 11, 2018

    Accepted: Oct. 22, 2018

    Published Online: Jul. 30, 2019

    The Author Email: Taotao Li (ltaotao1988@126.com)

    DOI:10.3788/LOP56.071201

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology