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Laser stripe extraction method in industrial environments utilizing self-adaptive convolution technique.

Xiao-Qia Yin, Wei Tao, Yi-Yang Feng

    Applied Optics
    |April 5, 2017
    PubMed
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    Accurate laser stripe extraction is crucial for 3D reconstruction in noisy industrial settings. This study introduces a two-step method using geometry and correlation for precise laser stripe center extraction and cubic Hermite spline fitting for smooth, continuous results.

    Area of Science:

    • Computer Vision
    • Robotics
    • Metrology

    Background:

    • Line-structured laser scanners are vital for industrial 3D reconstruction.
    • Challenges include variable lighting, complex backgrounds, and unstable lasers, leading to noise in laser stripe images.
    • Accurate laser stripe extraction is fundamental for reliable 3D data acquisition.

    Purpose of the Study:

    • To develop an effective two-step procedure for robust laser stripe extraction in challenging industrial environments.
    • To enhance the accuracy and reliability of 3D reconstruction using line-structured laser scanners.
    • To compare the performance of Akima spline and cubic Hermite spline for laser stripe centerline fitting.

    Main Methods:

    • A novel laser stripe center extraction method leveraging geometry and correlation to eliminate noise.

    Related Experiment Videos

  • Piecewise fitting using Akima spline and cubic Hermite spline for centerline smoothing.
  • Experimental validation using a rough metal step and a line-structured laser scanning system.

    • Main Results:

    • The proposed self-adaptive convolution-mass method effectively eliminates noise in industrial laser stripe images.
    • Cubic Hermite spline fitting demonstrated superior performance for generating smooth and continuous laser stripe centerlines compared to Akima spline.
    • The method achieved accurate laser stripe extraction, crucial for precise 3D reconstruction.

    Conclusions:

    • The developed two-step laser stripe extraction method significantly improves accuracy and robustness in industrial 3D reconstruction.
    • Cubic Hermite spline is recommended over Akima spline for optimal laser stripe centerline fitting in this application.
    • The findings contribute to advancing reliable 3D scanning technologies in complex industrial settings.