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Anomaly detection in videos aims at reporting anything that does not conform the normal behaviour or distribution. However, due to the sparsity of abnormal video clips in real life, collecting annotated data for supervised learning is…

Computer Vision and Pattern Recognition · Computer Science 2019-10-22 Yiwei Lu , Mahesh Kumar Krishna Reddy , Seyed shahabeddin Nabavi , Yang Wang

Zero-shot anomaly detection (ZSAD) often leverages pretrained vision or vision-language models, but many existing methods use prompt learning or complex modeling to fit the data distribution, resulting in high training or inference cost and…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Chaoran Xu , Chengkan Lv , Qiyu Chen , Feng Zhang , Zhengtao Zhang

The widespread adoption of digital services, along with the scale and complexity at which they operate, has made incidents in IT operations increasingly more likely, diverse, and impactful. This has led to the rapid development of a central…

Machine Learning · Computer Science 2025-04-01 Vincent Jacob , Yanlei Diao

Video anomaly detection has gained significant attention due to the increasing requirements of automatic monitoring for surveillance videos. Especially, the prediction based approach is one of the most studied methods to detect anomalies by…

Computer Vision and Pattern Recognition · Computer Science 2021-10-26 Chaewon Park , MyeongAh Cho , Minhyeok Lee , Sangyoun Lee

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 topic in computer vision. Motivated by the recent advances in self-supervised learning, this paper addresses VAD by solving an intuitive yet challenging pretext task, i.e., spatio-temporal…

Computer Vision and Pattern Recognition · Computer Science 2022-07-25 Guodong Wang , Yunhong Wang , Jie Qin , Dongming Zhang , Xiuguo Bao , Di Huang

Despite the prevailing transition from single-task to multi-task approaches in video anomaly detection, we observe that many adopt sub-optimal frameworks for individual proxy tasks. Motivated by this, we contend that optimizing single-task…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Guodong Shen , Yuqi Ouyang , Junru Lu , Yixuan Yang , Victor Sanchez

Skeleton-based video anomaly detection (SVAD) is a crucial task in computer vision. Accurately identifying abnormal patterns or events enables operators to promptly detect suspicious activities, thereby enhancing safety. Achieving this…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Ali Karami , Thi Kieu Khanh Ho , Narges Armanfard

Video Anomaly Detection (VAD) involves detecting anomalous events in videos, presenting a significant and intricate task within intelligent video surveillance. Existing studies often concentrate solely on features acquired from limited…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Zhewen Deng , Dongyue Chen , Shizhuo Deng

Industrial image anomaly detection (IAD) is a pivotal topic with huge value. Due to anomaly's nature, real anomalies in a specific modern industrial domain (i.e. domain-specific anomalies) are usually too rare to collect, which severely…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Siqi Wang , Yuanze Hu , Xinwang Liu , Siwei Wang , Guangpu Wang , Chuanfu Xu , Jie Liu , Ping Chen

In this work, we define and address a novel domain adaptation (DA) problem in semantic scene segmentation, where the target domain not only exhibits a data distribution shift w.r.t. the source domain, but also includes novel classes that do…

Computer Vision and Pattern Recognition · Computer Science 2021-02-17 Maxime Bucher , Tuan-Hung Vu , Matthieu Cord , Patrick Pérez

This paper introduces a new method to solve the cross-domain recognition problem. Different from the traditional domain adaption methods which rely on a global domain shift for all classes between source and target domain, the proposed…

Computer Vision and Pattern Recognition · Computer Science 2015-09-08 Yuewei Lin , Jing Chen , Yu Cao , Youjie Zhou , Lingfeng Zhang , Yuan Yan Tang , Song Wang

Video anomaly detection is commonly used in many applications such as security surveillance and is very challenging.A majority of recent video anomaly detection approaches utilize deep reconstruction models, but their performance is often…

Computer Vision and Pattern Recognition · Computer Science 2021-05-28 Xuanzhao Wang , Zhengping Che , Bo Jiang , Ning Xiao , Ke Yang , Jian Tang , Jieping Ye , Jingyu Wang , Qi Qi

Most models for weakly supervised video anomaly detection (WS-VAD) rely on multiple instance learning, aiming to distinguish normal and abnormal snippets without specifying the type of anomaly. However, the ambiguous nature of anomaly…

Computer Vision and Pattern Recognition · Computer Science 2024-09-04 Chenchen Tao , Xiaohao Peng , Chong Wang , Jiafei Wu , Puning Zhao , Jun Wang , Jiangbo Qian

Abnormal event detection or anomaly detection in surveillance videos is currently a challenge because of the diversity of possible events. Due to the lack of anomalous events at training time, anomaly detection requires the design of…

Computer Vision and Pattern Recognition · Computer Science 2024-09-17 Darshan Venkatrayappa

Video anomaly detection (VAD) addresses the problem of automatically finding anomalous events in video data. The primary data modalities on which current VAD systems work on are monochrome or RGB images. Using depth data in this context…

Computer Vision and Pattern Recognition · Computer Science 2022-04-13 Pascal Schneider , Jason Rambach , Bruno Mirbach , Didier Stricker

Video anomaly detection (VAD) is a vital yet complex open-set task in computer vision, commonly tackled through reconstruction-based methods. However, these methods struggle with two key limitations: (1) insufficient robustness in open-set…

Computer Vision and Pattern Recognition · Computer Science 2025-03-28 Xiaofeng Tan , Hongsong Wang , Xin Geng , Liang Wang

Zero-shot anomaly detection (ZSAD) enables anomaly detection without normal samples from target categories, addressing scenarios where task-specific training data is unavailable. However, existing ZSAD methods either neglect adaptation of…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Kiyoon Jeong , Jaehyuk Heo , Junyeong Son , Pilsung Kang

Zero-shot anomaly detection (ZSAD) enables identifying and localizing defects in unseen categories by relying solely on generalizable features rather than requiring any labeled examples of anomalies. However, existing ZSAD methods, whether…

Computer Vision and Pattern Recognition · Computer Science 2025-11-26 Zihan Wang , Samira Ebrahimi Kahou , Narges Armanfard

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