Robust Anomaly Detection in Industrial Environments via Meta-Learning

TL;DR

This paper introduces RAD, a meta-learning-based anomaly detection framework that effectively handles label noise in industrial environments, achieving high accuracy and robustness even with significant mislabeled data.

Contribution

RAD combines Normalizing Flows with Model-Agnostic Meta-Learning and uncertainty-guided regularization for robust anomaly detection under noisy labels in industrial settings.

Findings

Achieves I-AUROC scores of 95.4% and 94.6% on clean datasets.

Maintains detection accuracy above 86.8% and 92.1% with 50% mislabeled data.

Demonstrates robustness across diverse industrial scenarios.

Abstract

Anomaly detection is fundamental for ensuring quality control and operational efficiency in industrial environments, yet conventional approaches face significant challenges when training data contains mislabeled samples-a common occurrence in real-world scenarios. This paper presents RAD, a robust anomaly detection framework that integrates Normalizing Flows with Model-Agnostic Meta-Learning to address the critical challenge of label noise in industrial settings. Our approach employs a bi-level optimization strategy where meta-learning enables rapid adaptation to varying noise conditions, while uncertainty quantification guides adaptive L2 regularization to maintain model stability. The framework incorporates multiscale feature processing through pretrained feature extractors and leverages the precise likelihood estimation capabilities of Normalizing Flows for robust anomaly scoring. Comprehensive evaluation on MVTec-AD and KSDD2 datasets demonstrates superior performance, achieving I-AUROC scores of 95.4% and 94.6% respectively under clean conditions, while maintaining robust detection capabilities above 86.8% and 92.1% even when 50% of training samples are mislabeled. The results highlight RAD's exceptional resilience to noisy training conditions and its ability to detect subtle anomalies across diverse industrial scenarios, making it a practical solution for real-world anomaly detection applications where perfect data curation is challenging.