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Single-step adversarial training (SSAT) has demonstrated the potential to achieve both efficiency and robustness. However, SSAT suffers from catastrophic overfitting (CO), a phenomenon that leads to a severely distorted classifier, making…

Machine Learning · Computer Science 2024-09-17 Runqi Lin , Chaojian Yu , Tongliang Liu

High-performing out-of-distribution (OOD) detection, both anomaly and novel class, is an important prerequisite for the practical use of classification models. In this paper, we focus on the species recognition task in images concerned with…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 L. E. Hogeweg , R. Gangireddy , D. Brunink , V. J. Kalkman , L. Cornelissen , J. W. Kamminga

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 2019-11-12 Zilong Zhao , Robert Birke , Rui Han , Bogdan Robu , Sara Bouchenak , Sonia Ben Mokhtar , Lydia Y. Chen

Generalist graph anomaly detection (GAD) aims to detect anomalies on unseen graphs without graph-specific retraining. Nevertheless, existing approaches primarily focus on aligning heterogeneous features across different data domains via…

Machine Learning · Computer Science 2026-05-26 Yujing Liu , Yixin Liu , Yu Zheng , Alan Wee-Chung Liew , Xiaofeng Cao , Shirui Pan

Recent studies have addressed the concern of detecting and rejecting the out-of-distribution (OOD) samples as a major challenge in the safe deployment of deep learning (DL) models. It is desired that the DL model should only be confident…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Umar Khalid , Ashkan Esmaeili , Nazmul Karim , Nazanin Rahnavard

Open set anomaly detection (OSAD) is a crucial task that aims to identify abnormal patterns or behaviors in data sets, especially when the anomalies observed during training do not represent all possible classes of anomalies. The recent…

Machine Learning · Computer Science 2024-12-18 Yifeng Peng , Xinyi Li , Zhiding Liang , Ying Wang

3D anomaly detection (AD) is a crucial task in computer vision, aiming to identify anomalous points or regions from point cloud data. However, existing methods may encounter challenges when handling point clouds with changes in orientation…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Hanzhe Liang , Jie Zhou , Can Gao , Bingyang Guo , Jinbao Wang , Linlin Shen

Anomaly detection (such as telecom fraud detection and medical image detection) has attracted the increasing attention of people. The complex interaction between multiple entities widely exists in the network, which can reflect specific…

Machine Learning · Computer Science 2024-06-10 Xu Yuan , Na Zhou , Shuo Yu , Huafei Huang , Zhikui Chen , Feng Xia

Anomaly detection (AD) is often focused on detecting anomaly areas for industrial quality inspection and medical lesion examination. However, due to the specific scenario targets, the data scale for AD is relatively small, and evaluation…

Computer Vision and Pattern Recognition · Computer Science 2024-04-17 Jiangning Zhang , Chengjie Wang , Xiangtai Li , Guanzhong Tian , Zhucun Xue , Yong Liu , Guansong Pang , Dacheng Tao

The detection of the abnormal area from urban data is a significant research problem. However, to the best of our knowledge, previous methods designed on spatio-temporal anomalies are road-based or grid-based, which usually causes the data…

Social and Information Networks · Computer Science 2020-07-16 Huaishao Luo , Chuishi Meng , Bowen Wu , Junbo Zhang , Tianrui Li , Yu Zheng

Anomaly detection is the task of recognising novel samples which deviate significantly from pre-establishednormality. Abnormal classes are not present during training meaning that models must learn effective rep-resentations solely across…

Machine Learning · Computer Science 2023-03-08 Jack W Barker , Neelanjan Bhowmik , Yona Falinie A Gaus , Toby P Breckon

Feature compression is increasingly important for improving the efficiency of downstream tasks, especially in applications involving large-scale or multi-modal data. While existing methods typically rely on dedicated models for achieving…

Computer Vision and Pattern Recognition · Computer Science 2026-02-13 Yufan Liu , Daoyuan Ren , Zhipeng Zhang , Wenyang Luo , Bing Li , Weiming Hu , Stephen Maybank

Recent Anomaly Detection (AD) methods have achieved great success with In-Distribution (ID) data. However, real-world data often exhibits distribution shift, causing huge performance decay on traditional AD methods. From this perspective,…

Computer Vision and Pattern Recognition · Computer Science 2024-12-16 Zining Chen , Xingshuang Luo , Weiqiu Wang , Zhicheng Zhao , Fei Su , Aidong Men

Continuous electrocardiogram (ECG) monitoring via wearable devices is vital for early cardiovascular disease detection. However, deploying deep learning models on resource-constrained microcontrollers faces reliability challenges,…

Machine Learning · Computer Science 2026-01-26 Mustafa Fuad Rifet Ibrahim , Maurice Meijer , Alexander Schlaefer , Peer Stelldinger

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

Unsupervised anomaly detection (UAD) alleviates large labeling efforts by training exclusively on unlabeled in-distribution data and detecting outliers as anomalies. Generally, the assumption prevails that large training datasets allow the…

Computer Vision and Pattern Recognition · Computer Science 2024-10-29 Felix Meissen , Johannes Getzner , Alexander Ziller , Özgün Turgut , Georgios Kaissis , Martin J. Menten , Daniel Rueckert

Collaborative Object Detection (COD) and collaborative perception can integrate data or features from various entities, and improve object detection accuracy compared with individual perception. However, adversarial attacks pose a potential…

Computer Vision and Pattern Recognition · Computer Science 2025-02-05 Huiqun Huang , Cong Chen , Jean-Philippe Monteuuis , Jonathan Petit , Fei Miao

The presence of concept drift poses challenges for anomaly detection in time series. While anomalies are caused by undesirable changes in the data, differentiating abnormal changes from varying normal behaviours is difficult due to…

Databases · Computer Science 2025-07-01 Jongjun Park , Fei Chiang , Mostafa Milani

Anomaly detection is a critical requirement for ensuring safety in autonomous driving. In this work, we leverage Cooperative Perception to share information across nearby vehicles, enabling more accurate identification and consensus of…

Multiagent Systems · Computer Science 2025-01-30 Ashish Bastola , Hao Wang , Abolfazl Razi

Leveraging deep learning models for Anomaly Detection (AD) has seen widespread use in recent years due to superior performances over traditional methods. Recent deep methods for anomalies in images learn better features of normality in an…

Computation and Language · Computer Science 2021-04-13 Andrei Manolache , Florin Brad , Elena Burceanu