Adversarially Learned Anomaly Detection

Anomaly detection is a significant and hence well-studied problem. However, developing effective anomaly detection methods for complex and high-dimensional data remains a challenge. As Generative Adversarial Networks (GANs) are able to model the complex high-dimensional distributions of real-world d...

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Bibliographic Details
Published inProceedings (IEEE International Conference on Data Mining) pp. 727 - 736
Main Authors Zenati, Houssam, Romain, Manon, Foo, Chuan-Sheng, Lecouat, Bruno, Chandrasekhar, Vijay
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2018
Subjects
Anomaly detection
Computational modeling
Data models
Deep Learning
Gallium nitride
Generative adversarial networks
Generators
Novelty Detection
Training
Unsupervised Learning
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Summary:Anomaly detection is a significant and hence well-studied problem. However, developing effective anomaly detection methods for complex and high-dimensional data remains a challenge. As Generative Adversarial Networks (GANs) are able to model the complex high-dimensional distributions of real-world data, they offer a promising approach to address this challenge. In this work, we propose an anomaly detection method, Adversarially Learned Anomaly Detection (ALAD) based on bi-directional GANs, that derives adversarially learned features for the anomaly detection task. ALAD then uses reconstruction errors based on these adversarially learned features to determine if a data sample is anomalous. ALAD builds on recent advances to ensure data-space and latent-space cycle-consistencies and stabilize GAN training, which results in significantly improved anomaly detection performance. ALAD achieves state-of-the-art performance on a range of image and tabular datasets while being several hundred-fold faster at test time than the only published GAN-based method.
ISSN:2374-8486
DOI:10.1109/ICDM.2018.00088