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Anomalies are rare and anomaly detection is often therefore framed as One-Class Classification (OCC), i.e. trained solely on normalcy. Leading OCC techniques constrain the latent representations of normal motions to limited volumes and…

计算机视觉与模式识别 · 计算机科学 2023-08-29 Alessandro Flaborea , Luca Collorone , Guido D'Amely , Stefano D'Arrigo , Bardh Prenkaj , Fabio Galasso

Graph anomaly detection (GAD) aims to identify abnormal nodes that differ from the majority of the nodes in a graph, which has been attracting significant attention in recent years. Existing generalist graph models have achieved remarkable…

机器学习 · 计算机科学 2025-06-03 Hezhe Qiao , Chaoxi Niu , Ling Chen , Guansong Pang

Video Anomaly Detection(VAD) has been traditionally tackled in two main methodologies: the reconstruction-based approach and the prediction-based one. As the reconstruction-based methods learn to generalize the input image, the model merely…

计算机视觉与模式识别 · 计算机科学 2022-06-20 Joo-Yeon Lee , Woo-Jeoung Nam , Seong-Whan Lee

Anomaly detection aims to identify observations that deviate from the typical pattern of data. Anomalous observations may correspond to financial fraud, health risks, or incorrectly measured data in practice. We show detecting anomalies in…

机器学习 · 统计学 2020-05-26 Matthew Davidow , David S. Matteson

The collection and detection of video anomaly data has long been a challenging problem due to its rare occurrence and spatio-temporal scarcity. Existing video anomaly detection (VAD) methods under perform in open-world scenarios. Key…

计算机视觉与模式识别 · 计算机科学 2026-03-24 Zunkai Dai , Ke Li , Jiajia Liu , Jie Yang , Yuanyuan Qiao

mmWave radar enables human sensing in non-visual scenarios-e.g., through clothing or certain types of walls-where traditional cameras fail due to occlusion or privacy limitations. However, robust anomaly detection with mmWave remains…

计算机视觉与模式识别 · 计算机科学 2026-04-02 Tarik Reza Toha , Shao-Jung , Lu , Mahathir Monjur , Shahriar Nirjon

Unsupervised graph anomaly detection (GAD) has received increasing attention in recent years, which aims to identify data anomalous patterns utilizing only unlabeled node information from graph-structured data. However, prevailing…

机器学习 · 计算机科学 2025-11-14 Jiazhen Chen , Xiuqin Liang , Sichao Fu , Zheng Ma , Weihua Ou

Video anomaly detection aims to develop automated models capable of identifying abnormal events in surveillance videos. The benchmark setup for this task is extremely challenging due to: i) the limited size of the training sets, ii) weak…

计算机视觉与模式识别 · 计算机科学 2025-01-22 Jash Dalvi , Ali Dabouei , Gunjan Dhanuka , Min Xu

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…

计算机视觉与模式识别 · 计算机科学 2021-09-03 Yuandu Lai , Yahong Han , Yaowei Wang

Weakly-supervised methods for video anomaly detection (VAD) are conventionally based merely on RGB spatio-temporal features, which continues to limit their reliability in real-world scenarios. This is due to the fact that RGB-features are…

We present a novel end-to-end partially supervised deep learning approach for video anomaly detection and localization using only normal samples. The insight that motivates this study is that the normal samples can be associated with at…

计算机视觉与模式识别 · 计算机科学 2018-05-30 Yaxiang Fan , Gongjian Wen , Deren Li , Shaohua Qiu , Martin D. Levine

Visual Anomaly Detection (VAD) aims to identify abnormal samples in images that deviate from normal patterns, covering multiple domains, including industrial, logical, and medical fields. Due to the domain gaps between these fields,…

计算机视觉与模式识别 · 计算机科学 2025-03-11 Zhaopeng Gu , Bingke Zhu , Guibo Zhu , Yingying Chen , Ming Tang , Jinqiao Wang

Video anomaly detection (VAD) aims to identify abnormal events in videos. Traditional VAD methods generally suffer from the high costs of labeled data and full training, thus some recent works have explored leveraging frozen multi-modal…

计算机视觉与模式识别 · 计算机科学 2026-03-02 Zhaolin Cai , Fan Li , Huiyu Duan , Lijun He , Guangtao Zhai

In the domain of anomaly detection, methods often excel in either high-level semantic or low-level industrial benchmarks, rarely achieving cross-domain proficiency. Semantic anomalies are novelties that differ in meaning from the training…

计算机视觉与模式识别 · 计算机科学 2024-07-18 Luc P. J. Sträter , Mohammadreza Salehi , Efstratios Gavves , Cees G. M. Snoek , Yuki M. Asano

Few-Shot Industrial Visual Anomaly Detection (FS-IVAD) comprises a critical task in modern manufacturing settings, where automated product inspection systems need to identify rare defects using only a handful of normal/defect-free training…

计算机视觉与模式识别 · 计算机科学 2026-03-17 Aggelos Psiris , Yannis Panagakis , Maria Vakalopoulou , Georgios Th. Papadopoulos

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…

计算机视觉与模式识别 · 计算机科学 2025-06-17 Yu Wang , Shiwei Chen

Multimodal fake news detection often involves modelling heterogeneous data sources, such as vision and language. Existing detection methods typically rely on fusion effectiveness and cross-modal consistency to model the content,…

机器学习 · 计算机科学 2025-03-04 Lingzhi Shen , Yunfei Long , Xiaohao Cai , Imran Razzak , Guanming Chen , Kang Liu , Shoaib Jameel

Video anomaly detection is a challenging task because of diverse abnormal events. To this task, methods based on reconstruction and prediction are wildly used in recent works, which are built on the assumption that learning on normal data,…

计算机视觉与模式识别 · 计算机科学 2021-05-11 Hongyong Wang , Xinjian Zhang , Su Yang , Weishan Zhang

Video Anomaly Detection (VAD) is an open-set recognition task, which is usually formulated as a one-class classification (OCC) problem, where training data is comprised of videos with normal instances while test data contains both normal…

计算机视觉与模式识别 · 计算机科学 2024-04-09 Ayush K. Rai , Tarun Krishna , Feiyan Hu , Alexandru Drimbarean , Kevin McGuinness , Alan F. Smeaton , Noel E. O'Connor

Video anomaly detection (VAD) is an important but challenging task in computer vision. The main challenge rises due to the rarity of training samples to model all anomaly cases. Hence, semi-supervised anomaly detection methods have gotten…

计算机视觉与模式识别 · 计算机科学 2023-08-16 Mohammad Baradaran , Robert Bergevin