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Anomaly detection in hobbing tool images: using an unsupervised deep learning approach in manufacturing industry

  • This study explores the application of the PatchCore algorithm for anomaly classification in hobbing tools, an area of keen interest in industrial artificial intelligence application. Despite utilizing limited training images, the algorithm demonstrates capability in recognizing a variety of anomalies, promising to reduce the time-intensive labeling process traditionally undertaken by domain experts. The algorithm demonstrated an accuracy of 92%, precision of 84%, recall of 100%, and a balanced F1 score of 91%, showcasing its proficiency in identifying anomalies. However, the investigation also highlights that while the algorithm effectively identifies anomalies, it doesn't primarily recognize domain-specific wear issues. Thus, the presented approach is used only for pre-classification, with domain experts subsequently segmenting the images indicating significant wear. The intention is to employ a supervised learning procedure to identify actual wear. This premise will be further investigated in future research studies.

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Author of HS ReutlingenGrimm, Florian; Kiefer, Daniel; Straub, Tim; Bitsch, Günter
Erschienen in:Procedia computer science
Place of publication:Amsterdam
Document Type:Journal article
Publication year:2024
Tag:anomaly detection; industrial machine learning applications; tool image analysis; unsupervised deep learning
Issue:5th International Conference on Industry 4.0 and Smart Manufacturing (ISM 2023)
Page Number:10
First Page:2396
Last Page:2405
DDC classes:004 Informatik
Open access?:Ja
Licence (German):License Logo  Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International