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CostFilter-AD: Enhancing Anomaly Detection through Matching Cost Filtering

Created by
  • Haebom

Author

Zhe Zhang, Mingxiu Cai, Hanxiao Wang, Gaochang Wu, Tianyou Chai, Xiatian Zhu

Outline

This paper proposes CostFilter-AD, which introduces the concept of cost filtering, borrowed from classical matching tasks, to the unsupervised outlier detection (UAD) problem. We construct a matching cost volume between an input image and normal samples, and propose a cost volume filtering network that uses input observations as attention queries to suppress matching noise and capture subtle outliers. CostFilter-AD is designed as a plugin applicable to both reconstruction-based and embedding-based methods, and its performance is demonstrated on the MVTec-AD and VisA benchmarks.

Takeaways, Limitations

Takeaways:
Introducing the classic matching concept to UAD, offering a new approach.
Performance improvements over existing UAD methods by improving matching accuracy.
Applicable to both reconstruction-based and embedding-based methods.
Demonstrated excellent performance in MVTec-AD and VisA benchmarks.
Limitations:
The specific Limitations is not specified in the paper.
No mention of the computational complexity of CostFilter-AD.
Lack of information on the generalizability of the proposed method and its validation on diverse datasets.
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