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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

Reinforcement learning based post-training paradigms for Video Large Language Models (VideoLLMs) have achieved significant success by optimizing for visual-semantic tasks such as captioning or VideoQA. However, while these approaches…

Computer Vision and Pattern Recognition · Computer Science 2026-01-08 Xiaokun Sun , Zezhong Wu , Zewen Ding , Linli Xu

This paper investigates the performance of diffusion models for video anomaly detection (VAD) within the most challenging but also the most operational scenario in which the data annotations are not used. As being sparse, diverse,…

Computer Vision and Pattern Recognition · Computer Science 2023-07-04 Anil Osman Tur , Nicola Dall'Asen , Cigdem Beyan , Elisa Ricci

Current multimodal large language models (MLLMs) struggle with hour-level video understanding, facing significant challenges not only in modeling the substantial information volume of long videos but also in overcoming the memory wall and…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Hong Gao , Yiming Bao , Xuezhen Tu , Bin Zhong , Linan Yue , Minling Zhang

We introduce a novel sequential modeling approach which enables learning a Large Vision Model (LVM) without making use of any linguistic data. To do this, we define a common format, "visual sentences", in which we can represent raw images…

Computer Vision and Pattern Recognition · Computer Science 2023-12-04 Yutong Bai , Xinyang Geng , Karttikeya Mangalam , Amir Bar , Alan Yuille , Trevor Darrell , Jitendra Malik , Alexei A Efros

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

Humans can intuitively infer sounds from silent videos, but whether multimodal large language models can perform modal-mismatch reasoning without accessing target modalities remains relatively unexplored. Current…

Multimedia · Computer Science 2025-05-29 Yong Ren , Chenxing Li , Le Xu , Hao Gu , Duzhen Zhang , Yujie Chen , Manjie Xu , Ruibo Fu , Shan Yang , Dong Yu

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

Multi-modal large language models (MLLMs) have demonstrated considerable potential across various downstream tasks that require cross-domain knowledge. MLLMs capable of processing videos, known as Video-MLLMs, have attracted broad interest…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Jiajun Fei , Dian Li , Zhidong Deng , Zekun Wang , Gang Liu , Hui Wang

High-quality and consistent annotations are fundamental to the successful development of robust machine learning models. Traditional data annotation methods are resource-intensive and inefficient, often leading to a reliance on third-party…

Computer Vision and Pattern Recognition · Computer Science 2024-02-12 Amir Ziai , Aneesh Vartakavi

Anomaly detection in surveillance videos is attracting an increasing amount of attention. Despite the competitive performance of recent methods, they lack theoretical performance analysis, particularly due to the complex deep neural network…

Computer Vision and Pattern Recognition · Computer Science 2020-10-15 Keval Doshi , Yasin Yilmaz

Video understanding plays a vital role in bridging low-level visual signals with high-level cognitive reasoning, and is fundamental to applications such as autonomous driving, embodied AI, and the broader pursuit of AGI. The rapid…

Computer Vision and Pattern Recognition · Computer Science 2025-07-15 Yongheng Zhang , Xu Liu , Ruihan Tao , Qiguang Chen , Hao Fei , Wanxiang Che , Libo Qin

Automatically detecting abnormal events in videos is crucial for modern autonomous systems, yet existing Video Anomaly Detection (VAD) benchmarks lack the scene diversity, balanced anomaly coverage, and temporal complexity needed to…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Jie Li , Hongyi Cai , Mingkang Dong , Muxin Pu , Shan You , Fei Wang , Tao Huang

Unlike offline processing, streaming video vision-language models face two fundamental constraints: causality and accumulation. Causality prevents access to future frames that offline methods exploit, while accumulation causes tokens to…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Xueyi Chen , Keda Tao , Kele Shao , Huan Wang

Understanding long-form videos remains a significant challenge for vision--language models (VLMs) due to their extensive temporal length and high information density. Most current multimodal large language models (MLLMs) rely on uniform…

Computer Vision and Pattern Recognition · Computer Science 2025-10-06 Xian Zhang , Zexi Wu , Zinuo Li , Hongming Xu , Luqi Gong , Farid Boussaid , Naoufel Werghi , Mohammed Bennamoun

In weakly supervised video anomaly detection (WVAD), where only video-level labels indicating the presence or absence of abnormal events are available, the primary challenge arises from the inherent ambiguity in temporal annotations of…

Computer Vision and Pattern Recognition · Computer Science 2023-11-28 Yixuan Zhou , Yi Qu , Xing Xu , Fumin Shen , Jingkuan Song , Hengtao Shen

In the progress of industrial anomaly detection, general anomaly detection (GAD) is an emerging trend and also the ultimate goal. Unlike the conventional single- and multi-class AD, general AD aims to train a general AD model that can…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Xincheng Yao , Zefeng Qian , Chao Shi , Jiayang Song , Chongyang Zhang

Anomaly detection is vital in various industrial scenarios, including the identification of unusual patterns in production lines and the detection of manufacturing defects for quality control. Existing techniques tend to be specialized in…

Computer Vision and Pattern Recognition · Computer Science 2025-05-21 Xiaohao Xu , Yunkang Cao , Huaxin Zhang , Nong Sang , Xiaonan Huang

The video visual relation detection (VidVRD) task is to identify objects and their relationships in videos, which is challenging due to the dynamic content, high annotation costs, and long-tailed distribution of relations. Visual language…

Computer Vision and Pattern Recognition · Computer Science 2025-03-13 Qi Liu , Weiying Xue , Yuxiao Wang , Zhenao Wei

Video anomaly detection (VAD) plays a vital role in real-world applications such as security surveillance, autonomous driving, and industrial monitoring. Recent advances in large pre-trained models have opened new opportunities for…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 He Huang , Zixuan Hu , Dongxiao Li , Yao Xiao , Ling-Yu Duan