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Video anomaly detection (VAD) often learns the distribution of normal samples and detects the anomaly through measuring significant deviations, but the undesired generalization may reconstruct a few anomalies thus suppressing the…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Jiahao Lyu , Minghua Zhao , Jing Hu , Xuewen Huang , Shuangli Du , Cheng Shi , Zhiyong Lv

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…

Computer Vision and Pattern Recognition · Computer Science 2023-08-16 Mohammad Baradaran , Robert Bergevin

Video anomaly detection (VAD) aims to temporally locate abnormal events in a video. Existing works mostly rely on training deep models to learn the distribution of normality with either video-level supervision, one-class supervision, or in…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Luca Zanella , Willi Menapace , Massimiliano Mancini , Yiming Wang , Elisa Ricci

Video Anomaly Detection (VAD) plays a crucial role in modern surveillance systems, aiming to identify various anomalies in real-world situations. However, current benchmark datasets predominantly emphasize simple, single-frame anomalies…

Computer Vision and Pattern Recognition · Computer Science 2023-10-04 Yoav Arad , Michael Werman

Video Anomaly Detection (VAD) automates the identification of unusual events, such as security threats in surveillance videos. In real-world applications, VAD models must effectively operate in cross-domain settings, identifying rare…

Computer Vision and Pattern Recognition · Computer Science 2024-08-12 Yashika Jain , Ali Dabouei , Min Xu

The development of unsupervised Video Anomaly Detection (VAD) relies on technologies in the field of signal processing. Since the anomaly is quite ambiguous and unbounded, different detection demands may often be raised even in one…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Kai Cheng , Xinzhe Li , Lijuan Che

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,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Zhaopeng Gu , Bingke Zhu , Guibo Zhu , Yingying Chen , Ming Tang , Jinqiao Wang

Video anomaly detection (VAD) has been paid increasing attention due to its potential applications, its current dominant tasks focus on online detecting anomalies% at the frame level, which can be roughly interpreted as the binary or…

Computer Vision and Pattern Recognition · Computer Science 2024-02-29 Peng Wu , Jing Liu , Xiangteng He , Yuxin Peng , Peng Wang , Yanning Zhang

Anomaly detection and localization in visual data, including images and videos, are crucial in machine learning and real-world applications. Despite rapid advancements in visual anomaly detection (VAD), interpreting these often black-box…

Machine Learning · Computer Science 2025-08-19 Yizhou Wang , Dongliang Guo , Sheng Li , Octavia Camps , Yun Fu

Video anomaly detection (VAD) is an important computer vision problem. Thanks to the mode coverage capabilities of generative models, the likelihood-based paradigm is catching growing interest, as it can model normal distribution and detect…

Computer Vision and Pattern Recognition · Computer Science 2025-07-01 Hanwen Zhang , Congqi Cao , Qinyi Lv , Lingtong Min , Yanning Zhang

Traditional reconstruction-based methods have struggled to achieve competitive performance in anomaly detection. In this paper, we introduce Denoising Diffusion Anomaly Detection (DDAD), a novel denoising process for image reconstruction…

Computer Vision and Pattern Recognition · Computer Science 2025-04-29 Arian Mousakhan , Thomas Brox , Jawad Tayyub

The definition of anomaly detection is the identification of an unexpected event. Real-time detection of extreme events such as wildfires, cyclones, or floods using satellite data has become crucial for disaster management. Although several…

Computer Vision and Pattern Recognition · Computer Science 2023-06-09 Akash Awasthi , Son Ly , Jaer Nizam , Samira Zare , Videet Mehta , Safwan Ahmed , Keshav Shah , Ramakrishna Nemani , Saurabh Prasad , Hien Van Nguyen

Existing video anomaly detection datasets are inadequate for representing complex anomalies that occur due to the interactions between objects. The absence of complex anomalies in previous video anomaly detection datasets affects research…

Computer Vision and Pattern Recognition · Computer Science 2025-01-17 Furkan Mumcu , Michael J. Jones , Yasin Yilmaz , Anoop Cherian

Video Anomaly Detection (VAD), which aims to detect anomalies that deviate from expectation, has attracted increasing attention in recent years. Existing advancements in VAD primarily focus on model architectures and training strategies,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-03 Zihao Liu , Xiaoyu Wu , Wenna Li , Linlin Yang , Shengjin Wang

Video anomaly detection (VAD) plays a critical role in public safety applications such as intelligent surveillance. However, the rarity, unpredictability, and high annotation cost of real-world anomalies make it difficult to scale VAD…

Computer Vision and Pattern Recognition · Computer Science 2025-08-04 Suhang Cai , Xiaohao Peng , Chong Wang , Xiaojie Cai , Jiangbo Qian

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

Weakly supervised video anomaly detection (WSVAD) is a challenging task since only video-level labels are available for training. In previous studies, the discriminative power of the learned features is not strong enough, and the data…

Computer Vision and Pattern Recognition · Computer Science 2022-12-19 Congqi Cao , Xin Zhang , Shizhou Zhang , Peng Wang , Yanning Zhang

Graph Anomaly Detection (GAD) is crucial for identifying abnormal entities within networks, garnering significant attention across various fields. Traditional unsupervised methods, which decode encoded latent representations of unlabeled…

Machine Learning · Computer Science 2025-02-26 Jinghan Li , Yuan Gao , Jinda Lu , Junfeng Fang , Congcong Wen , Hui Lin , Xiang Wang

The application of supervised models to clinical screening tasks is challenging due to the need for annotated data for each considered pathology. Unsupervised Anomaly Detection (UAD) is an alternative approach that aims to identify any…

Image and Video Processing · Electrical Eng. & Systems 2025-01-24 Finn Behrendt , Debayan Bhattacharya , Robin Mieling , Lennart Maack , Julia Krüger , Roland Opfer , Alexander Schlaefer

Anomaly detection in videos has been attracting an increasing amount of attention. Despite the competitive performance of recent methods on benchmark datasets, they typically lack desirable features such as modularity, cross-domain…

Computer Vision and Pattern Recognition · Computer Science 2021-03-23 Keval Doshi , Yasin Yilmaz