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Performing anomaly detection in hybrid systems is a challenging task since it requires analysis of timing behavior and mutual dependencies of both discrete and continuous signals. Typically, it requires modeling system behavior, which is…

Machine Learning · Computer Science 2020-10-30 Nemanja Hranisavljevic , Oliver Niggemann , Alexander Maier

Unsupervised Anomaly Detection (UAD) plays a crucial role in identifying abnormal patterns within data without labeled examples, holding significant practical implications across various domains. Although the individual contributions of…

Machine Learning · Computer Science 2024-06-04 Zeyu Fang , Ming Gu , Sheng Zhou , Jiawei Chen , Qiaoyu Tan , Haishuai Wang , Jiajun Bu

Anomaly Detection involves identifying deviations from normal data distributions and is critical in fields such as medical diagnostics and industrial defect detection. Traditional AD methods typically require the availability of normal…

Computer Vision and Pattern Recognition · Computer Science 2025-08-12 Alireza Salehi , Mohammadreza Salehi , Reshad Hosseini , Cees G. M. Snoek , Makoto Yamada , Mohammad Sabokrou

Industrial anomaly detection is a critical component of modern manufacturing, yet the scarcity of defective samples restricts traditional detection methods to scenario-specific applications. Although Vision-Language Models (VLMs)…

Computer Vision and Pattern Recognition · Computer Science 2025-08-15 Yanhui Li , Yunkang Cao , Chengliang Liu , Yuan Xiong , Xinghui Dong , Chao Huang

Existing industrial anomaly detection methods primarily concentrate on unsupervised learning with pristine RGB images. Yet, both RGB and 3D data are crucial for anomaly detection, and the datasets are seldom completely clean in practical…

Computer Vision and Pattern Recognition · Computer Science 2024-06-05 Chengjie Wang , Haokun Zhu , Jinlong Peng , Yue Wang , Ran Yi , Yunsheng Wu , Lizhuang Ma , Jiangning Zhang

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

Recent efforts towards video anomaly detection (VAD) try to learn a deep autoencoder to describe normal event patterns with small reconstruction errors. The video inputs with large reconstruction errors are regarded as anomalies at the test…

Computer Vision and Pattern Recognition · Computer Science 2021-09-03 Yuandu Lai , Yahong Han , Yaowei Wang

Anomaly detection (AD) is a machine learning task that identifies anomalies by learning patterns from normal training data. In many real-world scenarios, anomalies vary in severity, from minor anomalies with little risk to severe…

Machine Learning · Computer Science 2024-11-25 Tri Cao , Minh-Huy Trinh , Ailin Deng , Quoc-Nam Nguyen , Khoa Duong , Ngai-Man Cheung , Bryan Hooi

Deep neural networks (DNN) can achieve high performance when applied to In-Distribution (ID) data which come from the same distribution as the training set. When presented with anomaly inputs not from the ID, the outputs of a DNN should be…

Machine Learning · Computer Science 2021-10-08 Fangzhen Zhao , Chenyi Zhang , Naipeng Dong , Zefeng You , Zhenxin Wu

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

Anomaly detection (AD) has attracted remarkable attention in hyperspectral image (HSI) processing fields, and most existing deep learning (DL)-based algorithms indicate dramatic potential for detecting anomaly samples through specific…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Jianing Wang , Siying Guo , Zheng Hua , Runhu Huang , Jinyu Hu , Maoguo Gong

The recent rapid development of deep learning has laid a milestone in industrial Image Anomaly Detection (IAD). In this paper, we provide a comprehensive review of deep learning-based image anomaly detection techniques, from the…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Jiaqi Liu , Guoyang Xie , Jinbao Wang , Shangnian Li , Chengjie Wang , Feng Zheng , Yaochu Jin

Unsupervised anomaly detection (UAD) is a widely adopted approach in industry due to rare anomaly occurrences and data imbalance. A desirable characteristic of an UAD model is contained generalization ability which excels in the…

Computer Vision and Pattern Recognition · Computer Science 2023-08-29 YeongHyeon Park , Sungho Kang , Myung Jin Kim , Hyeonho Jeong , Hyunkyu Park , Hyeong Seok Kim , Juneho Yi

Classification algorithms have been widely adopted to detect anomalies for various systems, e.g., IoT, cloud and face recognition, under the common assumption that the data source is clean, i.e., features and labels are correctly set.…

Machine Learning · Computer Science 2021-03-22 Zilong Zhao , Robert Birke , Rui Han , Bogdan Robu , Sara Bouchenak , Sonia Ben Mokhtar , Lydia Y. Chen

Change detection and irregular object extraction in 3D point clouds is a challenging task that is of high importance not only for autonomous navigation but also for updating existing digital twin models of various industrial environments.…

Computer Vision and Pattern Recognition · Computer Science 2023-12-18 Nikolaos Stathoulopoulos , Anton Koval , George Nikolakopoulos

Anomaly detection is a ubiquitous and challenging task relevant across many disciplines. With the vital role communication networks play in our daily lives, the security of these networks is imperative for smooth functioning of society. To…

Cryptography and Security · Computer Science 2022-10-18 Gopikrishna Rathinavel , Nikhil Muralidhar , Timothy O'Shea , Naren Ramakrishnan

Anomaly detection in complex industrial environments poses unique challenges, particularly in contexts characterized by data sparsity and evolving operational conditions. Predictive maintenance (PdM) in such settings demands methodologies…

Machine Learning · Computer Science 2025-03-12 Alicia Russell-Gilbert , Sudip Mittal , Shahram Rahimi , Maria Seale , Joseph Jabour , Thomas Arnold , Joshua Church

Detecting anomalies in images is an important task, especially in real-time computer vision applications. In this work, we focus on computational efficiency and propose a lightweight feature extractor that processes an image in less than a…

Computer Vision and Pattern Recognition · Computer Science 2024-02-09 Kilian Batzner , Lars Heckler , Rebecca König

Multimodal industrial anomaly detection benefits from integrating RGB appearance with 3D surface geometry, yet existing \emph{unsupervised} approaches commonly rely on memory banks, teacher-student architectures, or fragile fusion schemes,…

Computer Vision and Pattern Recognition · Computer Science 2026-03-05 Radia Daci , Vito Renò , Cosimo Patruno , Angelo Cardellicchio , Abdelmalik Taleb-Ahmed , Marco Leo , Cosimo Distante

Anomaly detection is critical for the secure and reliable operation of industrial control systems. As our reliance on such complex cyber-physical systems grows, it becomes paramount to have automated methods for detecting anomalies,…

Machine Learning · Computer Science 2024-05-10 Mayra Macas , Chunming Wu , Walter Fuertes
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