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Domain gaps between training data (source) and real-world environments (target) often degrade the performance of object detection models. Most existing methods aim to bridge this gap by aligning features across source and target domains but…

Computer Vision and Pattern Recognition · Computer Science 2025-04-10 Onkar Krishna , Hiroki Ohashi

Anomaly detection in videos refers to the identification of events that do not conform to expected behavior. However, almost all existing methods tackle the problem by minimizing the reconstruction errors of training data, which cannot…

Computer Vision and Pattern Recognition · Computer Science 2018-03-14 Wen Liu , Weixin Luo , Dongze Lian , Shenghua Gao

For data-constrained, complex and dynamic industrial environments, there is a critical need for transferable and multimodal methodologies to enhance anomaly detection and therefore, prevent costs associated with system failures. Typically,…

Online anomaly detection of time-series data is an important and challenging task in machine learning. Gaussian processes (GPs) are powerful and flexible models for modeling time-series data. However, the high time complexity of GPs limits…

Machine Learning · Computer Science 2019-05-16 Jingjing Fei , Shiliang Sun

A robust and efficient anomaly detection technique is proposed, capable of dealing with crowded scenes where traditional tracking based approaches tend to fail. Initial foreground segmentation of the input frames confines the analysis to…

Computer Vision and Pattern Recognition · Computer Science 2013-04-04 Vikas Reddy , Conrad Sanderson , Brian C. Lovell

Classifying streaming data requires the development of methods which are computationally efficient and able to cope with changes in the underlying distribution of the stream, a phenomenon known in the literature as concept drift. We propose…

Machine Learning · Statistics 2012-12-27 Gordon J. Ross , Niall M. Adams , Dimitris K. Tasoulis , David J. Hand

Online anomaly detection (OAD) plays a pivotal role in real-time analytics and decision-making for evolving data streams. However, existing methods often rely on costly retraining and rigid decision boundaries, limiting their ability to…

Machine Learning · Computer Science 2026-04-22 Jiaqi Zhu , Shaofeng Cai , Jie Chen , Fang Deng , Beng Chin Ooi , Wenqiao Zhang

Concept drift refers to a change in the data distribution affecting the data stream of future samples. Consequently, learning models operating on the data stream might become obsolete, and need costly and difficult adjustments such as…

Machine Learning · Computer Science 2023-09-20 André Artelt , Kleanthis Malialis , Christos Panayiotou , Marios Polycarpou , Barbara Hammer

Anomaly detection of time series, especially multivariate time series(time series with multiple sensors), has been focused on for several years. Though existing method has achieved great progress, there are several challenging problems to…

Machine Learning · Computer Science 2022-11-29 Weixuan Xiong , Xiaochen Sun

Anomaly detection aims to identify deviations from normal patterns within data. This task is particularly crucial in dynamic graphs, which are common in applications like social networks and cybersecurity, due to their evolving structures…

Machine Learning · Computer Science 2024-12-24 Xiao Yang , Xuejiao Zhao , Zhiqi Shen

Anomaly detection in spatiotemporal data is a challenging problem encountered in a variety of applications including hyperspectral imaging, video surveillance and urban traffic monitoring. In the case of urban traffic data, anomalies refer…

Signal Processing · Electrical Eng. & Systems 2021-03-02 Seyyid Emre Sofuoglu , Selin Aviyente

In the domain of machine learning, Neural Memory Networks (NMNs) have recently achieved impressive results in a variety of application areas including visual question answering, trajectory prediction, object tracking, and language…

Neural and Evolutionary Computing · Computer Science 2019-10-15 Tharindu Fernando , Simon Denman , David Ahmedt-Aristizabal , Sridha Sridharan , Kristin Laurens , Patrick Johnston , Clinton Fookes

Modern analytical systems must be ready to process streaming data and correctly respond to data distribution changes. The phenomenon of changes in data distributions is called concept drift, and it may harm the quality of the used models.…

Machine Learning · Computer Science 2021-10-26 Jędrzej Kozal , Filip Guzy , Michał Woźniak

The notion of concept drift refers to the phenomenon that the data generating distribution changes over time; as a consequence machine learning models may become inaccurate and need adjustment. In this paper we consider the problem of…

Machine Learning · Computer Science 2022-05-16 Fabian Hinder , André Artelt , Valerie Vaquet , Barbara Hammer

Video anomaly detection (VAD) is a challenging task that detects anomalous frames in continuous surveillance videos. Most previous work utilizes the spatio-temporal correlation of visual features to distinguish whether there are…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Guangyu Dai , Dong Chen , Siliang Tang , Yueting Zhuang

Concept drift refers to the change of data distributions over time. While drift poses a challenge for learning models, requiring their continual adaption, it is also relevant in system monitoring to detect malfunctions, system failures, and…

Machine Learning · Computer Science 2025-02-07 Fabian Hinder , Valerie Vaquet , Barbara Hammer

The classification of distracted drivers is pivotal for ensuring safe driving. Previous studies demonstrated the effectiveness of neural networks in automatically predicting driver distraction, fatigue, and potential hazards. However,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-02 Luigi Celona , Simone Bianco , Paolo Napoletano

Group anomaly detection is crucial in many network applications, but faces challenges due to diverse anomaly patterns. Motivated by the success of large language models (LLMs) in natural language processing, graph foundation models (GFMs)…

Artificial Intelligence · Computer Science 2026-01-16 Jiujiu Chen , Weijun Zeng , Shaofeng Hu , Sihong Xie , Hui Xiong

Anomaly inspection plays an important role in industrial manufacture. Existing anomaly inspection methods are limited in their performance due to insufficient anomaly data. Although anomaly generation methods have been proposed to augment…

Computer Vision and Pattern Recognition · Computer Science 2024-02-23 Teng Hu , Jiangning Zhang , Ran Yi , Yuzhen Du , Xu Chen , Liang Liu , Yabiao Wang , Chengjie Wang

Detecting out-of-distribution (OOD) data is crucial in machine learning applications to mitigate the risk of model overconfidence, thereby enhancing the reliability and safety of deployed systems. The majority of existing OOD detection…

Artificial Intelligence · Computer Science 2024-08-22 Christos Constantinou , Georgios Ioannides , Aman Chadha , Aaron Elkins , Edwin Simpson