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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 11 — Jun. 3, 2013
  • pp: 13442–13449

Statistical behavior analysis and precision optimization for the laser stripe center detector based on Steger's algorithm

Li Qi, Yixin Zhang, Xuping Zhang, Shun Wang, and Fei Xie  »View Author Affiliations

Optics Express, Vol. 21, Issue 11, pp. 13442-13449 (2013)

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Triangulation laser range scanning, which has been wildly used in various applications, can reconstruct the 3D geometric of the object with high precision by processing the image of laser stripe. The unbiased line extractor proposed by Steger is one of the most commonly used algorithms in laser stripe center extraction for its precision and robustness. Therefore, it is of great significance to assess the statistical performance of the Steger method when it is applied on laser stripe with Gaussian intensity profile. In this paper, a statistical behavior analysis for the laser stripe center extractor based on Steger method has been carried out. Relationships between center extraction precision, image quality and stripe characteristics have been examined analytically. Optimal scale of Gaussian smoothing kernel can be determined for each laser stripe image to achieve the highest precision according to the derived formula. Flexible three-step noise estimation procedure has been proposed to evaluate the center extraction precision of a typical triangulation laser scanning system by simply referring to the acquired images. The validity of our analysis has been verified by experiments on both artificial and natural images.

© 2013 OSA

OCIS Codes
(100.0100) Image processing : Image processing
(140.0140) Lasers and laser optics : Lasers and laser optics
(150.6910) Machine vision : Three-dimensional sensing

ToC Category:
Image Processing

Original Manuscript: March 18, 2013
Revised Manuscript: May 9, 2013
Manuscript Accepted: May 17, 2013
Published: May 28, 2013

Li Qi, Yixin Zhang, Xuping Zhang, Shun Wang, and Fei Xie, "Statistical behavior analysis and precision optimization for the laser stripe center detector based on Steger's algorithm," Opt. Express 21, 13442-13449 (2013)

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