Cited by 15Industrial Vision Systems and Defect DetectionNon-Destructive Testing TechniquesInfrastructure Maintenance and Monitoring

Detection of Scarfing Faults on the Edges of Slabs

Open access
Ryu, Sang-Gyu, Choi, Doo-chul, Jeon, Yong-Ju, Lee, Sang Jun, Yun, Jong Pil, Kim, Sang Woo·2014·ISIJ International

Abstract

At present, quality control is becoming a major issue in steel production. Thus we developed an algorithm that uses machine vision to detect scarfing faults on slabs, which impairs the steel quality of subsequent products such as steel plates. Scarfing faults typically occur in three locations: the top, middle, and edge of the slab. Our proposed algorithm is focused on detecting scarfing faults on the edge of slab, which is tiny and sometimes indistinct. A machine vision system with a line scan camera was designed, which facilitates the detection of brightness differences and texture differences between well-scarfed and poorly-scarfed slab surface. Scarfing faults are tiny on the edges, so we propose a new segmentation method that takes advantage of capabilities of the line scan camera. A segmented image is filtered using Gabor filters, which were designed to focus on the boundary with scarfing faults to identify specific regions with defect, referred to as defect candidates. Each defect candidate is classified using a Support Vector Machine (SVM) classifier based on its extracted features. Our proposed algorithm was effective according to the experimental trials using 2061 frame images acquired from real samples, where the true detection rate was 97.26% and the false detection rate was 1.66%. Our proposed system and algorithm based on machine vision technology facilitates scarfing faults detection, which can be detected before rolling process, resulting in improved steel quality.

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Authors
Ryu, S.-G., Choi, D.-C., Jeon, Y.-J., Lee, S. J., Yun, J. P., & Kim, S. W.
Affiliations
  • Pohang University of Science and Technology (KR)
  • Pohang Iron and Steel (South Korea) (KR)
Venue
ISIJ International
Published
2014
Volume
54
Issue
1
Pages
112-118
ISSN
  • 0915-1559 (ISSN-L)
  • 1347-5460
OpenAlex
W1984496433
Cited by
15
References
17
Citations by year
2025: 1 · 2023: 1 · 2020: 3 · 2018: 4 · 2017: 1 · 2016: 3 · 2015: 2
FWCI
3.76
Type
journal article
Language
en
Open access
Locations
  • ISIJ International (publishedVersion)
  • Open Access System for Information Sharing (Pohang University of Science and Technology) (submittedVersion)
Funders
  • Ministry of Science, ICT and Future Planning (NIPA-2013-H0203-13-1001)
  • National IT Industry Promotion Agency (NIPA-2013-H0203-13-1001)
Topics
  • Physical Sciences › Engineering › Industrial and Manufacturing Engineering › Industrial Vision Systems and Defect Detection
  • Physical Sciences › Engineering › Mechanical Engineering › Non-Destructive Testing Techniques
  • Physical Sciences › Engineering › Civil and Structural Engineering › Infrastructure Maintenance and Monitoring
Keywords
machine vision, line-scan camera, image segmentation, Gabor filters, support vector machine, defect detection, steel quality control, steel plate production

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