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In our digital universe nowadays, enormous amount of data are produced in a streaming manner in a variety of application areas. These data are often unlabelled. In this case, identifying infrequent events, such as anomalies, poses a great…

机器学习 · 计算机科学 2023-09-07 Jin Li , Kleanthis Malialis , Marios M. Polycarpou

Anomaly detection (AD) is the machine learning task of identifying highly discrepant abnormal samples by solely relying on the consistency of the normal training samples. Under the constraints of a distribution shift, the assumption that…

机器学习 · 计算机科学 2023-12-25 João B. S. Carvalho , Mengtao Zhang , Robin Geyer , Carlos Cotrini , Joachim M. Buhmann

Automating the detection of anomalous events within long video sequences is challenging due to the ambiguity of how such events are defined. We approach the problem by learning generative models that can identify anomalies in videos using…

计算机视觉与模式识别 · 计算机科学 2016-12-16 Jefferson Ryan Medel , Andreas Savakis

Anomaly detection is critical for finding suspicious behavior in innumerable systems. We need to detect anomalies in real-time, i.e. determine if an incoming entity is anomalous or not, as soon as we receive it, to minimize the effects of…

机器学习 · 计算机科学 2023-01-31 Siddharth Bhatia

Action recognition in surveillance video makes our life safer by detecting the criminal events or predicting violent emergencies. However, efficient action recognition is not free of difficulty. First, there are so many action classes in…

计算机视觉与模式识别 · 计算机科学 2017-10-23 Kun Liu , Wu Liu , Huadong Ma , Wenbing Huang , Xiongxiong Dong

Much of the worlds data is streaming, time-series data, where anomalies give significant information in critical situations. Yet detecting anomalies in streaming data is a difficult task, requiring detectors to process data in real-time,…

人工智能 · 计算机科学 2016-07-11 Subutai Ahmad , Scott Purdy

Unsupervised anomaly discovery in stream data is a research topic with many practical applications. However, in many cases, it is not easy to collect enough training data with labeled anomalies for supervised learning of an anomaly detector…

神经与进化计算 · 计算机科学 2021-03-10 Piotr S. Maciąg , Marzena Kryszkiewicz , Robert Bembenik , Jesus L. Lobo , Javier Del Ser

The goal of anomaly detection is to identify observations that are generated by a distribution that differs from the reference distribution that qualifies normal behavior. When examining a time series, the reference distribution may evolve…

统计方法学 · 统计学 2024-07-23 Etienne Krönert , Dalila Hattab , Alain Celisse

Detecting anomaly patterns from images is a crucial artificial intelligence technique in industrial applications. Recent research in this domain has emphasized the necessity of a large volume of training data, overlooking the practical…

计算机视觉与模式识别 · 计算机科学 2025-07-30 Shenxing Wei , Xing Wei , Zhiheng Ma , Songlin Dong , Shaochen Zhang , Yihong Gong

Anomaly detection is a fundamental task in machine learning and data mining, with significant applications in cybersecurity, industrial fault diagnosis, and clinical disease monitoring. Traditional methods, such as statistical modeling and…

机器学习 · 计算机科学 2025-05-09 Yi Chen

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…

计算机视觉与模式识别 · 计算机科学 2018-03-14 Wen Liu , Weixin Luo , Dongze Lian , Shenghua Gao

The considerable significance of Anomaly Detection (AD) problem has recently drawn the attention of many researchers. Consequently, the number of proposed methods in this research field has been increased steadily. AD strongly correlates…

计算机视觉与模式识别 · 计算机科学 2021-03-03 Bahram Mohammadi , Mahmood Fathy , Mohammad Sabokrou

In today's world, the amount of data produced in every field has increased at an unexpected level. In the face of increasing data, the importance of data processing has increased remarkably. Our resource topic is on the processing of video…

计算机视觉与模式识别 · 计算机科学 2021-06-24 Talha Dilber , Mehmet Serdar Guzel , Erkan Bostanci

Despite inherent ill-definition, anomaly detection is a research endeavor of great interest within machine learning and visual scene understanding alike. Most commonly, anomaly detection is considered as the detection of outliers within a…

计算机视觉与模式识别 · 计算机科学 2019-05-03 Samet Akçay , Amir Atapour-Abarghouei , Toby P. Breckon

This study investigates unsupervised anomaly action recognition, which identifies video-level abnormal-human-behavior events in an unsupervised manner without abnormal samples, and simultaneously addresses three limitations in the…

计算机视觉与模式识别 · 计算机科学 2023-03-28 Fumiaki Sato , Ryo Hachiuma , Taiki Sekii

Anomaly detection is a critical and challenging task that aims to identify data points deviating from normal patterns and distributions within a dataset. Various methods have been proposed using a one-class-one-model approach, but these…

机器学习 · 计算机科学 2023-12-07 Jae Young Lee , Wonjun Lee , Jaehyun Choi , Yongkwi Lee , Young Seog Yoon

Anomaly detection is the task of identifying abnormal behavior of a system. Anomaly detection in computational workflows is of special interest because of its wide implications in various domains such as cybersecurity, finance, and social…

The detection and the quantification of anomalies in image data are critical tasks in industrial scenes such as detecting micro scratches on product. In recent years, due to the difficulty of defining anomalies and the limit of correcting…

计算机视觉与模式识别 · 计算机科学 2018-11-08 Masanari Kimura , Takashi Yanagihara

Video anomaly detection is a core problem in vision. Correctly detecting and identifying anomalous behaviors in pedestrians from video data will enable safety-critical applications such as surveillance, activity monitoring, and human-robot…

计算机视觉与模式识别 · 计算机科学 2022-07-07 Asiegbu Miracle Kanu-Asiegbu , Ram Vasudevan , Xiaoxiao Du

Progress in video anomaly detection research is currently slowed by small datasets that lack a wide variety of activities as well as flawed evaluation criteria. This paper aims to help move this research effort forward by introducing a…

计算机视觉与模式识别 · 计算机科学 2020-01-27 Bharathkumar Ramachandra , Michael Jones