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Large Language Models (LLMs) have attained human-level fluency in text generation, which complicates the distinguishing between human-written and LLM-generated texts. This increases the risk of misuse and highlights the need for reliable…

Machine Learning · Computer Science 2025-11-19 Zheng Chen , Yushi Feng , Jisheng Dang , Yue Deng , Changyang He , Hongxi Pu , Haoxuan Li , Bo Li

The surge in real-time data collection across various industries has underscored the need for advanced anomaly detection in both univariate and multivariate time series data. This paper introduces TransNAS-TSAD, a framework that synergizes…

Machine Learning · Computer Science 2024-03-06 Ijaz Ul Haq , Byung Suk Lee , Donna M. Rizzo

Anomaly Detection in multivariate time series is a major problem in many fields. Due to their nature, anomalies sparsely occur in real data, thus making the task of anomaly detection a challenging problem for classification algorithms to…

Machine Learning · Computer Science 2023-08-08 Anastasios Iliopoulos , John Violos , Christos Diou , Iraklis Varlamis

Video Anomaly Detection (VAD) automates the identification of unusual events, such as security threats in surveillance videos. In real-world applications, VAD models must effectively operate in cross-domain settings, identifying rare…

Computer Vision and Pattern Recognition · Computer Science 2024-08-12 Yashika Jain , Ali Dabouei , Min Xu

Time-series anomaly detection (TSAD) is critical in domains such as industrial monitoring, healthcare, and cybersecurity, but it remains challenging due to rare and heterogeneous anomalies and the scarcity of labelled data. This scarcity…

Machine Learning · Computer Science 2026-05-05 Romain Hermary , Samet Hicsonmez , Dan Pineau , Abd El Rahman Shabayek , Djamila Aouada

Video Anomaly Detection (VAD) is an essential yet challenging task in signal processing. Since certain anomalies cannot be detected by isolated analysis of either temporal or spatial information, the interaction between these two types of…

Computer Vision and Pattern Recognition · Computer Science 2023-07-07 Zhiyuan Ning , Zhangxun Li , Zhengliang Guo , Zile Wang , Liang Song

Anomalous sound detection (ASD) is one of the most significant tasks of mechanical equipment monitoring and maintaining in complex industrial systems. In practice, it is vital to precisely identify abnormal status of the working mechanical…

Model-agnostic anomaly detection is one of the promising approaches in the search for new beyond the standard model physics. In this paper, we present Set-VAE, a particle-based variational autoencoder (VAE) anomaly detection algorithm. We…

High Energy Physics - Experiment · Physics 2023-11-30 Ryan Liu , Abhijith Gandrakota , Jennifer Ngadiuba , Maria Spiropulu , Jean-Roch Vlimant

Weakly supervised video anomaly detection (WS-VAD) is tasked with pinpointing temporal intervals containing anomalous events within untrimmed videos, utilizing only video-level annotations. However, a significant challenge arises due to the…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Yu Wang , Shiwei Chen

Anomaly detection, which aims to identify anomalies deviating from normal patterns, is challenging due to the limited amount of normal data available. Unlike most existing unified methods that rely on carefully designed image feature…

Computer Vision and Pattern Recognition · Computer Science 2025-09-01 Jiawei Liu , Jiahe Hou , Wei Wang , Jinsong Du , Yang Cong , Huijie Fan

Advanced metering infrastructure (AMI) provides high-resolution electricity consumption data that can enhance monitoring, diagnosis, and decision making in modern power distribution systems. Detecting anomalies in these time-series…

Signal Processing · Electrical Eng. & Systems 2026-01-15 Fahimeh Orvati Nia , Shima Salehi , Joshua Peeples

Deep learning models have become the dominant approach for multivariate time series anomaly detection (MTSAD), often reporting substantial performance improvements over classical statistical methods. However, these gains are frequently…

Machine Learning · Statistics 2026-03-20 Bruna Alves , Ana Martins , Armando J. Pinho , Sónia Gouveia

Video Anomaly Detection (VAD) is an important topic in computer vision. Motivated by the recent advances in self-supervised learning, this paper addresses VAD by solving an intuitive yet challenging pretext task, i.e., spatio-temporal…

Computer Vision and Pattern Recognition · Computer Science 2022-07-25 Guodong Wang , Yunhong Wang , Jie Qin , Dongming Zhang , Xiuguo Bao , Di Huang

Time series anomaly detection is a challenging problem due to the complex temporal dependencies and the limited label data. Although some algorithms including both traditional and deep models have been proposed, most of them mainly focus on…

Machine Learning · Computer Science 2023-03-28 Chaoli Zhang , Tian Zhou , Qingsong Wen , Liang Sun

Anomaly detection (AD) plays a vital role across a wide range of real-world domains by identifying data instances that deviate from expected patterns, potentially signaling critical events such as system failures, fraudulent activities, or…

Machine Learning · Computer Science 2025-07-11 Amirhossein Sadough , Mahyar Shahsavari , Mark Wijtvliet , Marcel van Gerven

Many organisations manage service quality and monitor a large set devices and servers where each entity is associated with telemetry or physical sensor data series. Recently, various methods have been proposed to detect behavioural…

Social and Information Networks · Computer Science 2023-05-10 Len Feremans , Boris Cule , Bart Goethals

Anomaly detection is an important task for complex systems (e.g., industrial facilities, manufacturing, large-scale science experiments), where failures in a sub-system can lead to low yield, faulty products, or even damage to components.…

Machine Learning · Computer Science 2023-09-06 Ryan Humble , Zhe Zhang , Finn O'Shea , Eric Darve , Daniel Ratner

Zero-shot anomaly detection (ZSAD) recognizes and localizes anomalies in previously unseen objects by establishing feature mapping between textual prompts and inspection images, demonstrating excellent research value in flexible industrial…

Computer Vision and Pattern Recognition · Computer Science 2026-04-02 Huilin Deng , Hongchen Luo , Wei Zhai , Yang Cao , Yu Kang

In the contemporary digital landscape, the continuous generation of extensive streaming data across diverse domains has become pervasive. Yet, a significant portion of this data remains unlabeled, posing a challenge in identifying…

Computational Engineering, Finance, and Science · Computer Science 2025-08-25 Jin Li , Kleanthis Malialis , Christos G. Panayiotou , Marios M. Polycarpou

Anomaly detection has been a challenging task given high-dimensional multivariate time series data generated by networked sensors and actuators in Cyber-Physical Systems (CPS). Besides the highly nonlinear, complex, and dynamic natures of…

Machine Learning · Computer Science 2021-08-31 Kai Zhang , Yushan Jiang , Lee Seversky , Chengtao Xu , Dahai Liu , Houbing Song