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Anomaly detection in spatiotemporal data is a challenging problem encountered in a variety of applications, including video surveillance, medical imaging data, and urban traffic monitoring. Existing anomaly detection methods focus mainly on…

Machine Learning · Computer Science 2025-10-02 Rachita Mondal , Mert Indibi , Tapabrata Maiti , Selin Aviyente

Detecting anomalies in traffic scenes is crucial for ensuring safety in autonomous driving, yet collecting representative anomalous data remains challenging. Existing anomaly detection methods are highly specialized and rely on normality as…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Albert Schotschneider , Daniel Bogdoll , Svetlana Pavlitska , Ahmed Abouelazm , Johann Marius Zoellner

Anomaly detection (AD) is increasingly recognized as a key component for ensuring the resilience of future communication systems. While deep learning has shown state-of-the-art AD performance, its application in critical systems is hindered…

Machine Learning · Computer Science 2025-10-29 Lukas Schynol , Marius Pesavento

This paper presents a novel density estimation method for anomaly detection using density matrices (a powerful mathematical formalism from quantum mechanics) and Fourier features. The method can be seen as an efficient approximation of…

Machine Learning · Computer Science 2022-10-27 Oscar Bustos-Brinez , Joseph Gallego-Mejia , Fabio A. González

Previous industrial anomaly detection methods often struggle to handle the extensive diversity in training sets, particularly when they contain stylistically diverse and feature-rich samples, which we categorize as feature-rich anomaly…

Computer Vision and Pattern Recognition · Computer Science 2025-06-16 Fengjie Wang , Chengming Liu , Lei Shi , Pang Haibo

The paper introduces Supervised Embedding and Clustering Anomaly Detection (SEMC-AD), a method designed to efficiently identify faulty alarm logs in a mobile network and alleviate the challenges of manual monitoring caused by the growing…

Machine Learning · Computer Science 2023-10-11 R. Mosayebi , H. Kia , A. Kianpour Raki

In this paper, we introduce Masked Anomaly Detection (MAD), a general self-supervised learning task for multivariate time series anomaly detection. With the increasing availability of sensor data from industrial systems, being able to…

Machine Learning · Computer Science 2022-10-04 Yiwei Fu , Feng Xue

Anomaly detection (AD) plays a crucial role in various domains, including cybersecurity, finance, and healthcare, by identifying patterns or events that deviate from normal behaviour. In recent years, significant progress has been made in…

Machine Learning · Computer Science 2024-01-24 Hadi Hojjati , Thi Kieu Khanh Ho , Narges Armanfard

Anomaly detection is a critical problem in data analysis and pattern recognition, finding applications in various domains. We introduce quantum support vector data description (QSVDD), an unsupervised learning algorithm designed for anomaly…

Quantum Physics · Physics 2024-09-19 Hyeondo Oh , Daniel K. Park

Machine learning--based anomaly detection (AD) methods are promising tools for extending the coverage of searches for physics beyond the Standard Model (BSM). One class of AD methods that has received significant attention is resonant…

Unsupervised Continuous Anomaly Detection (UCAD) is gaining attention for effectively addressing the catastrophic forgetting and heavy computational burden issues in traditional Unsupervised Anomaly Detection (UAD). However, existing UCAD…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Mingle Zhou , Jiahui Liu , Jin Wan , Gang Li , Min Li

Anomaly detection techniques enable effective anomaly detection and diagnosis in multi-variate time series data, which are of major significance for today's industrial applications. However, establishing an anomaly detection system that can…

Machine Learning · Computer Science 2024-05-02 Lingrui Yu

While the mainstream research in anomaly detection has mainly followed the one-class classification, practical industrial environments often incur noisy training data due to annotation errors or lack of labels for new or refurbished…

Machine Learning · Computer Science 2024-11-26 Jiin Im , Yongho Son , Je Hyeong Hong

Unsupervised anomaly detection (UAD) seeks to localize the anomaly mask of an input image with respect to normal samples. Either by reconstructing normal counterparts (reconstruction-based) or by learning an image feature embedding space…

Image and Video Processing · Electrical Eng. & Systems 2025-10-06 Zhe Zhang , Mingxiu Cai , Hanxiao Wang , Gaochang Wu , Tianyou Chai , Xiatian Zhu

We present a transformer-based image anomaly detection and localization network. Our proposed model is a combination of a reconstruction-based approach and patch embedding. The use of transformer networks helps to preserve the spatial…

Computer Vision and Pattern Recognition · Computer Science 2021-11-03 Pankaj Mishra , Riccardo Verk , Daniele Fornasier , Claudio Piciarelli , Gian Luca Foresti

Anomaly Detection (AD) defines the task of identifying observations or events that deviate from typical - or normal - patterns, a critical capability in IT security for recognizing incidents such as system misconfigurations, malware…

Efficient anomaly detection and diagnosis in multivariate time-series data is of great importance for modern industrial applications. However, building a system that is able to quickly and accurately pinpoint anomalous observations is a…

Machine Learning · Computer Science 2022-05-17 Shreshth Tuli , Giuliano Casale , Nicholas R. Jennings

Training a unified model is considered to be more suitable for practical industrial anomaly detection scenarios due to its generalization ability and storage efficiency. However, this multi-class setting, which exclusively uses normal data,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Jianlong Hu , Xu Chen , Zhenye Gan , Jinlong Peng , Shengchuan Zhang , Jiangning Zhang , Yabiao Wang , Chengjie Wang , Liujuan Cao , Rongrong Ji

With the high requirements of automation in the era of Industry 4.0, anomaly detection plays an increasingly important role in higher safety and reliability in the production and manufacturing industry. Recently, autoencoders have been…

Machine Learning · Computer Science 2021-03-09 Yiwen Liao , Alexander Bartler , Bin Yang

Synthetic data provides a promising approach to address data scarcity for training machine learning models; however, adoption without proper quality assessments may introduce artifacts, distortions, and unrealistic features that compromise…

Computer Vision and Pattern Recognition · Computer Science 2025-11-10 Rucha Deshpande , Tahsin Rahman , Miguel Lago , Adarsh Subbaswamy , Jana G. Delfino , Ghada Zamzmi , Elim Thompson , Aldo Badano , Seyed Kahaki