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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

Most cross-domain unsupervised Video Anomaly Detection (VAD) works assume that at least few task-relevant target domain training data are available for adaptation from the source to the target domain. However, this requires laborious…

计算机视觉与模式识别 · 计算机科学 2022-12-15 Abhishek Aich , Kuan-Chuan Peng , Amit K. Roy-Chowdhury

Video anomaly detection is a challenging task because most anomalies are scarce and non-deterministic. Many approaches investigate the reconstruction difference between normal and abnormal patterns, but neglect that anomalies do not…

计算机视觉与模式识别 · 计算机科学 2022-06-28 Guodong Shen , Yuqi Ouyang , Victor Sanchez

We study anomaly detection and introduce an algorithm that processes variable length, irregularly sampled sequences or sequences with missing values. Our algorithm is fully unsupervised, however, can be readily extended to supervised or…

机器学习 · 统计学 2020-05-26 Oguzhan Karaahmetoglu , Fatih Ilhan , Ismail Balaban , Suleyman Serdar Kozat

This study explores the recently proposed and challenging multi-view Anomaly Detection (AD) task. Single-view tasks will encounter blind spots from other perspectives, resulting in inaccuracies in sample-level prediction. Therefore, we…

计算机视觉与模式识别 · 计算机科学 2025-08-12 Haoyang He , Jiangning Zhang , Guanzhong Tian , Chengjie Wang , Lei Xie

Training-free video anomaly detection (VAD) has recently emerged as a scalable alternative to supervised approaches, yet existing methods largely rely on static prompting and geometry-agnostic feature fusion. As a result, anomaly inference…

计算机视觉与模式识别 · 计算机科学 2026-03-17 Ali Zia , Usman Ali , Muhammad Umer Ramzan , Hamza Abid , Abdul Rehman , Wei Xiang

Audio-visual zero-shot learning aims to recognize unseen classes based on paired audio-visual sequences. Recent methods mainly focus on learning multi-modal features aligned with class names to enhance the generalization ability to unseen…

计算机视觉与模式识别 · 计算机科学 2024-04-25 Haoxing Chen , Yaohui Li , Yan Hong , Zizheng Huang , Zhuoer Xu , Zhangxuan Gu , Jun Lan , Huijia Zhu , Weiqiang Wang

Visual sensory anomaly detection (AD) is an essential problem in computer vision, which is gaining momentum recently thanks to the development of AI for good. Compared with semantic anomaly detection which detects anomaly at the label level…

计算机视觉与模式识别 · 计算机科学 2022-02-16 Xi Jiang , Guoyang Xie , Jinbao Wang , Yong Liu , Chengjie Wang , Feng Zheng , Yaochu Jin

Anomaly detection (AD) plays a pivotal role in numerous web-based applications, including malware detection, anti-money laundering, device failure detection, and network fault analysis. Most methods, which rely on unsupervised learning, are…

机器学习 · 计算机科学 2024-02-07 Haihong Zhao , Chenyi Zi , Yang Liu , Chen Zhang , Yan Zhou , Jia Li

The widespread implementation of urban surveillance systems has necessitated more sophisticated techniques for anomaly detection to ensure enhanced public safety. This paper presents a significant advancement in the field of anomaly…

计算机视觉与模式识别 · 计算机科学 2024-11-14 Sareh Soltani Nejad , Anwar Haque

Anomaly Detection (AD), as a critical problem, has been widely discussed. In this paper, we specialize in one specific problem, Visual Defect Detection (VDD), in many industrial applications. And in practice, defect image samples are very…

计算机视觉与模式识别 · 计算机科学 2022-11-30 Yapeng Teng , Haoyang Li , Fuzhen Cai , Ming Shao , Siyu Xia

Anomaly detection is a popular and vital task in various research contexts, which has been studied for several decades. To ensure the safety of people's lives and assets, video surveillance has been widely deployed in various public spaces,…

计算机视觉与模式识别 · 计算机科学 2021-10-12 Jing Ren , Feng Xia , Yemeng Liu , Ivan Lee

Anomaly detection (AD) aims to identify defective images and localize their defects (if any). Ideally, AD models should be able to detect defects over many image classes; without relying on hard-coded class names that can be uninformative…

计算机视觉与模式识别 · 计算机科学 2024-04-01 Chih-Hui Ho , Kuan-Chuan Peng , Nuno Vasconcelos

Vision-Language Models (VLMs) demonstrate strong general-purpose reasoning but remain limited in physics-grounded anomaly detection, where causal understanding of dynamics is essential. Existing VLMs, trained predominantly on…

计算机视觉与模式识别 · 计算机科学 2026-03-17 Yao Gu , Xiaohao Xu , Yingna Wu

While anomaly detection has made significant progress, generating detailed analyses that incorporate industrial knowledge remains a challenge. To address this gap, we introduce OmniAD, a novel framework that unifies anomaly detection and…

计算机视觉与模式识别 · 计算机科学 2025-05-29 Shifang Zhao , Yiheng Lin , Lu Han , Yao Zhao , Yunchao Wei

Manipulated videos often contain subtle inconsistencies between their visual and audio signals. We propose a video forensics method, based on anomaly detection, that can identify these inconsistencies, and that can be trained solely using…

计算机视觉与模式识别 · 计算机科学 2023-03-29 Chao Feng , Ziyang Chen , Andrew Owens

Deploying video anomaly detection in practice is hampered by the scarcity and collection cost of real abnormal footage. We address this by training without any real abnormal videos while evaluating under the standard weakly supervised…

计算机视觉与模式识别 · 计算机科学 2025-12-09 Satoshi Hashimoto , Hitoshi Nishimura , Yanan Wang , Mori Kurokawa

Recent advancements in sequence prediction have significantly improved the accuracy of video data interpretation; however, existing models often overlook the potential of attention-based mechanisms for next-frame prediction. This study…

计算机视觉与模式识别 · 计算机科学 2024-04-18 Yiqiao Yin

Weakly supervised video anomaly detection (WS-VAD) is a challenging problem that aims to learn VAD models only with video-level annotations. In this work, we propose a Long-Short Temporal Co-teaching (LSTC) method to address the WS-VAD…

计算机视觉与模式识别 · 计算机科学 2023-04-05 Shengyang Sun , Xiaojin Gong

Video Anomaly Detection (VAD) systems can autonomously monitor and identify disturbances, reducing the need for manual labor and associated costs. However, current VAD systems are often limited by their superficial semantic understanding of…

计算机视觉与模式识别 · 计算机科学 2024-05-28 Jiaqi Tang , Hao Lu , Ruizheng Wu , Xiaogang Xu , Ke Ma , Cheng Fang , Bin Guo , Jiangbo Lu , Qifeng Chen , Ying-Cong Chen