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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 2 — Feb. 1, 2014
  • pp: 227–237

Defect detection for corner cracks in steel billets using a wavelet reconstruction method

Yong-Ju Jeon, Doo-chul Choi, Sang Jun Lee, Jong Pil Yun, and Sang Woo Kim  »View Author Affiliations


JOSA A, Vol. 31, Issue 2, pp. 227-237 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000227


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Abstract

Presently, automatic inspection algorithms are widely used to ensure high-quality products and achieve high productivity in the steelmaking industry. In this paper, we propose a vision-based method for detecting corner cracks on the surface of steel billets. Because of the presence of scales composed of oxidized substances, the billet surfaces are not uniform and vary considerably with the lighting conditions. To minimize the influence of scales and improve the accuracy of detection, a detection method based on a visual inspection algorithm is proposed. Wavelet reconstruction is used to reduce the effect of scales. Texture and morphological features are used to identify the corner cracks among the defective candidates. Finally, the experimental results show that the proposed algorithm is effective in detecting corner cracks on the surfaces of the steel billets.

© 2014 Optical Society of America

OCIS Codes
(150.3040) Machine vision : Industrial inspection
(150.1135) Machine vision : Algorithms

ToC Category:
Machine Vision

History
Original Manuscript: August 7, 2013
Revised Manuscript: December 5, 2013
Manuscript Accepted: December 8, 2013
Published: January 9, 2014

Citation
Yong-Ju Jeon, Doo-chul Choi, Sang Jun Lee, Jong Pil Yun, and Sang Woo Kim, "Defect detection for corner cracks in steel billets using a wavelet reconstruction method," J. Opt. Soc. Am. A 31, 227-237 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-2-227

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