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Human actions that do not conform to usual behavior are considered as anomalous and such actors are called anomalous entities. Detection of anomalous entities using visual data is a challenging problem in computer vision. This paper…

Computer Vision and Pattern Recognition · Computer Science 2021-03-10 Hamza Riaz , Muhammad Uzair , Habib Ullah

Understanding abnormal events in videos is a vital and challenging task that has garnered significant attention in a wide range of applications. Although current video understanding Multi-modal Large Language Models (MLLMs) are capable of…

Computer Vision and Pattern Recognition · Computer Science 2025-11-04 Yingxian Chen , Jiahui Liu , Ruidi Fan , Yanwei Li , Chirui Chang , Shizhen Zhao , Wilton W. T. Fok , Xiaojuan Qi , Yik-Chung Wu

Video anomaly detection (VAD) has witnessed significant advancements through the integration of large language models (LLMs) and vision-language models (VLMs), addressing critical challenges such as interpretability, temporal reasoning, and…

Computer Vision and Pattern Recognition · Computer Science 2024-12-25 Xi Ding , Lei Wang

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

Automatic detection of natural disasters and incidents has become more important as a tool for fast response. There have been many studies to detect incidents using still images and text. However, the number of approaches that exploit…

Computer Vision and Pattern Recognition · Computer Science 2023-01-10 Duygu Sesver , Alp Eren Gençoğlu , Çağrı Emre Yıldız , Zehra Günindi , Faeze Habibi , Ziya Ata Yazıcı , Hazım Kemal Ekenel

Anomaly detection in crowds enables early rescue response. A plug-and-play smart camera for crowd surveillance has numerous constraints different from typical anomaly detection: the training data cannot be used iteratively; there are no…

Computer Vision and Pattern Recognition · Computer Science 2020-06-17 Muhammad Umar Karim Khan , Mishal Fatima , Chong-Min Kyung

Due to the COVID-19 pandemic, many professional entities shifted toward remote collaboration and video conferencing (VC) tools. Social virtual reality (VR) platforms present an alternative to VC for meetings and collaborative activities.…

Human-Computer Interaction · Computer Science 2025-06-30 Anya Osborne , Sabrina Fielder , Lee Taber , Tara Lamb , Joshua McVeigh-Schultz , Katherine Isbister

Video anomaly detection plays a significant role in intelligent surveillance systems. To enhance model's anomaly recognition ability, previous works have typically involved RGB, optical flow, and text features. Recently, dynamic vision…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Yuanbin Qian , Shuhan Ye , Chong Wang , Xiaojie Cai , Jiangbo Qian , Jiafei Wu

Meetings are a pervasive method of communication within all types of companies and organizations, and using remote collaboration systems to conduct meetings has increased dramatically since the COVID-19 pandemic. However, not all meetings…

Audio and Speech Processing · Electrical Eng. & Systems 2023-04-06 Szu-Wei Fu , Yaran Fan , Yasaman Hosseinkashi , Jayant Gupchup , Ross Cutler

Video anomaly detection is an essential but challenging task. The prevalent methods mainly investigate the reconstruction difference between normal and abnormal patterns but ignore the semantics consistency between appearance and motion…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Xiangyu Huang , Caidan Zhao , Zhiqiang Wu

VERSA provides a general-purpose framework for defining and recognizing events in live or recorded surveillance video streams. The approach for event recognition in VERSA is using a declarative logic language to define the spatial and…

Computer Vision and Pattern Recognition · Computer Science 2010-07-23 Stephen O'Hara

How far are deep models from real-world video anomaly understanding (VAU)? Current works typically emphasize on detecting unexpected occurrences deviated from normal patterns or comprehending anomalous events with interpretable…

Computer Vision and Pattern Recognition · Computer Science 2025-11-04 Yating Yu , Congqi Cao , Zhaoying Wang , Weihua Meng , Jie Li , Yuxin Li , Zihao Wei , Zhongpei Shen , Jiajun Zhang

Identifying anomalies from time series data plays an important role in various fields such as infrastructure security, intelligent operation and maintenance, and space exploration. Current research focuses on detecting the anomalies after…

Machine Learning · Computer Science 2024-10-17 Sinong Zhao , Wenrui Wang , Hongzuo Xu , Zhaoyang Yu , Qingsong Wen , Gang Wang , xiaoguang Liu , Guansong Pang

Video Anomaly Detection (VAD) has emerged as a pivotal task in computer vision, with broad relevance across multiple fields. Recent advances in deep learning have driven significant progress in this area, yet the field remains fragmented…

Computer Vision and Pattern Recognition · Computer Science 2025-08-21 Ghazal Alinezhad Noghre , Armin Danesh Pazho , Hamed Tabkhi

Video anomaly detection refers to the identification of events that deviate from the expected behavior. Due to the lack of anomalous samples in training, video anomaly detection becomes a very challenging task. Existing methods almost…

Computer Vision and Pattern Recognition · Computer Science 2022-04-11 Xiangyu Huang , Caidan Zhao , Yilin Wang , Zhiqiang Wu

Most of the crowd abnormal event detection methods rely on complex hand-crafted features to represent the crowd motion and appearance. Convolutional Neural Networks (CNN) have shown to be a powerful tool with excellent representational…

Computer Vision and Pattern Recognition · Computer Science 2018-01-30 Mahdyar Ravanbakhsh , Moin Nabi , Hossein Mousavi , Enver Sangineto , Nicu Sebe

Videoconferencing is now a frequent mode of communication in both professional and informal settings, yet it often lacks the fluidity and enjoyment of in-person conversation. This study leverages multimodal machine learning to predict…

Machine Learning · Computer Science 2025-03-11 Andrew Chang , Viswadruth Akkaraju , Ray McFadden Cogliano , David Poeppel , Dustin Freeman

Recovering the spatial layout of the cameras and the geometry of the scene from extreme-view images is a longstanding challenge in computer vision. Prevailing 3D reconstruction algorithms often adopt the image matching paradigm and presume…

Computer Vision and Pattern Recognition · Computer Science 2022-06-17 Wei-Chiu Ma , Anqi Joyce Yang , Shenlong Wang , Raquel Urtasun , Antonio Torralba

Abnormal activity recognition requires detection of occurrence of anomalous events that suffer from a severe imbalance in data. In a video, normal is used to describe activities that conform to usual events while the irregular events which…

Computer Vision and Pattern Recognition · Computer Science 2019-04-16 Abhishek Joshi , Vinay P. Namboodiri

The increasing utilization of surveillance cameras in smart cities, coupled with the surge of online video applications, has heightened concerns regarding public security and privacy protection, which propelled automated Video Anomaly…

Computer Vision and Pattern Recognition · Computer Science 2025-04-04 Jing Liu , Yang Liu , Jieyu Lin , Jielin Li , Liang Cao , Peng Sun , Bo Hu , Liang Song , Azzedine Boukerche , Victor C. M. Leung
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