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Video anomaly detection (VAD) is crucial for video analysis and surveillance in computer vision. However, existing VAD models rely on learned normal patterns, which makes them difficult to apply to diverse environments. Consequently, users…

Computer Vision and Pattern Recognition · Computer Science 2025-12-08 Sunghyun Ahn , Youngwan Jo , Kijung Lee , Sein Kwon , Inpyo Hong , Sanghyun Park

Towards open-ended Video Anomaly Detection (VAD), existing methods often exhibit biased detection when faced with challenging or unseen events and lack interpretability. To address these drawbacks, we propose Holmes-VAD, a novel framework…

Computer Vision and Pattern Recognition · Computer Science 2024-07-02 Huaxin Zhang , Xiaohao Xu , Xiang Wang , Jialong Zuo , Chuchu Han , Xiaonan Huang , Changxin Gao , Yuehuan Wang , Nong Sang

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) aims to locate events that deviate from normal patterns in videos. Traditional approaches often rely on extensive labeled data and incur high computational costs. Recent tuning-free methods based on Multimodal…

Computer Vision and Pattern Recognition · Computer Science 2025-12-24 Zhaolin Cai , Fan Li , Ziwei Zheng , Haixia Bi , Lijun He

Video anomaly detection (VAD) aims to identify unexpected events in videos and has wide applications in safety-critical domains. While semi-supervised methods trained on only normal samples have gained traction, they often suffer from high…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Zongcan Ding , Haodong Zhang , Peng Wu , Guansong Pang , Zhiwei Yang , Peng Wang , Yanning Zhang

Video Anomaly Detection (VAD) aims to localize abnormal events on the timeline of long-range surveillance videos. Anomaly-scoring-based methods have been prevailing for years but suffer from the high complexity of thresholding and low…

Computer Vision and Pattern Recognition · Computer Science 2024-01-12 Hui Lv , Qianru Sun

Video anomaly detection (VAD) aims to discover behaviors or events deviating from the normality in videos. As a long-standing task in the field of computer vision, VAD has witnessed much good progress. In the era of deep learning, with the…

Computer Vision and Pattern Recognition · Computer Science 2024-10-22 Peng Wu , Chengyu Pan , Yuting Yan , Guansong Pang , Peng Wang , Yanning Zhang

Video Anomaly Detection~(VAD) focuses on identifying anomalies within videos. Supervised methods require an amount of in-domain training data and often struggle to generalize to unseen anomalies. In contrast, training-free methods leverage…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Yihua Shao , Haojin He , Sijie Li , Siyu Chen , Xinwei Long , Fanhu Zeng , Yuxuan Fan , Muyang Zhang , Ziyang Yan , Ao Ma , Xiaochen Wang , Hao Tang , Yan Wang , Shuyan Li

Video anomaly detection (VAD) aims to detect anomalies that deviate from what is expected. In open-world scenarios, the expected events may change as requirements change. For example, not wearing a mask may be considered abnormal during a…

Computer Vision and Pattern Recognition · Computer Science 2026-03-04 Zihao Liu , Xiaoyu Wu , Jianqin Wu , Xuxu Wang , Linlin Yang

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…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Yu Wang , Shiwei Chen

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

Video Anomaly Detection (VAD) can play a key role in spotting unusual activities in video footage. VAD is difficult to use in real-world settings due to the dynamic nature of human actions, environmental variations, and domain shifts.…

Computer Vision and Pattern Recognition · Computer Science 2025-08-13 Shanle Yao , Ghazal Alinezhad Noghre , Armin Danesh Pazho , Hamed Tabkhi

Video anomaly detection (VAD) has been intensively studied for years because of its potential applications in intelligent video systems. Existing unsupervised VAD methods tend to learn normality from training sets consisting of only normal…

Computer Vision and Pattern Recognition · Computer Science 2023-01-10 Mengyang Zhao , Xinhua Zeng , Yang Liu , Jing Liu , Di Li , Xing Hu , Chengxin Pang

Open Set Video Anomaly Detection (OpenVAD) aims to identify abnormal events from video data where both known anomalies and novel ones exist in testing. Unsupervised models learned solely from normal videos are applicable to any testing…

Computer Vision and Pattern Recognition · Computer Science 2022-08-24 Yuansheng Zhu , Wentao Bao , Qi Yu

Video anomaly detection (VAD) remains a challenging task in the pattern recognition community due to the ambiguity and diversity of abnormal events. Existing deep learning-based VAD methods usually leverage proxy tasks to learn the normal…

Computer Vision and Pattern Recognition · Computer Science 2022-11-03 Mengyang Zhao , Yang Liu , Jing Li , Xinhua Zeng

Video anomaly detection (VAD) holds immense importance across diverse domains such as surveillance, healthcare, and environmental monitoring. While numerous surveys focus on conventional VAD methods, they often lack depth in exploring…

Computer Vision and Pattern Recognition · Computer Science 2024-07-02 Moshira Abdalla , Sajid Javed , Muaz Al Radi , Anwaar Ulhaq , Naoufel Werghi

Video Anomaly Detection (VAD) identifies unusual activities in video streams, a key technology with broad applications ranging from surveillance to healthcare. Tackling VAD in real-life settings poses significant challenges due to the…

Computer Vision and Pattern Recognition · Computer Science 2024-04-30 Shanle Yao , Ghazal Alinezhad Noghre , Armin Danesh Pazho , Hamed Tabkhi

Video anomaly detection (VAD) identifies suspicious events in videos, which is critical for crime prevention and homeland security. In this paper, we propose a simple but highly effective VAD method that relies on attribute-based…

Computer Vision and Pattern Recognition · Computer Science 2025-01-28 Tal Reiss , Yedid Hoshen

Video anomaly detection (VAD) aims to identify and ground anomalous behaviors or events in videos, serving as a core technology in the fields of intelligent surveillance and public safety. With the advancement of deep learning, the…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Shibo Gao , Peipei Yang , Haiyang Guo , Yangyang Liu , Yi Chen , Shuai Li , Han Zhu , Jian Xu , Xu-Yao Zhang , Linlin Huang

Video Anomaly Detection (VAD) serves as a pivotal technology in the intelligent surveillance systems, enabling the temporal or spatial identification of anomalous events within videos. While existing reviews predominantly concentrate on…

Computer Vision and Pattern Recognition · Computer Science 2024-02-02 Yang Liu , Dingkang Yang , Yan Wang , Jing Liu , Jun Liu , Azzedine Boukerche , Peng Sun , Liang Song
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