Deep Learning for Anomaly Detection: A Survey
It organizes existing research for practitioners and researchers in anomaly detection, but is incremental as it synthesizes rather than introduces new methods.
This survey provides a structured overview of deep learning methods for anomaly detection, categorizing state-of-the-art techniques and assessing their effectiveness across various application domains.
Anomaly detection is an important problem that has been well-studied within diverse research areas and application domains. The aim of this survey is two-fold, firstly we present a structured and comprehensive overview of research methods in deep learning-based anomaly detection. Furthermore, we review the adoption of these methods for anomaly across various application domains and assess their effectiveness. We have grouped state-of-the-art research techniques into different categories based on the underlying assumptions and approach adopted. Within each category we outline the basic anomaly detection technique, along with its variants and present key assumptions, to differentiate between normal and anomalous behavior. For each category, we present we also present the advantages and limitations and discuss the computational complexity of the techniques in real application domains. Finally, we outline open issues in research and challenges faced while adopting these techniques.