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Video Anomaly Detection (VAD) aims to automatically analyze spatiotemporal patterns in surveillance videos collected from open spaces to detect anomalous events that may cause harm, such as fighting, stealing, and car accidents. However,…

计算机视觉与模式识别 · 计算机科学 2025-07-01 Yang Liu , Siao Liu , Xiaoguang Zhu , Jielin Li , Hao Yang , Liangyu Teng , Juncen Guo , Yan Wang , Dingkang Yang , Jing Liu

Diffusion models, a powerful and universal generative AI technology, have achieved tremendous success in computer vision, audio, reinforcement learning, and computational biology. In these applications, diffusion models provide flexible…

机器学习 · 计算机科学 2024-04-12 Minshuo Chen , Song Mei , Jianqing Fan , Mengdi Wang

Anomaly detection is the process of identifying atypical data samples that significantly deviate from the majority of the dataset. In the realm of clinical screening and diagnosis, detecting abnormalities in medical images holds great…

计算机视觉与模式识别 · 计算机科学 2023-10-11 Xianyao Hu , Congming Jin

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…

计算机视觉与模式识别 · 计算机科学 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

Video Anomaly Detection (VAD), aiming to identify abnormalities within a specific context and timeframe, is crucial for intelligent Video Surveillance Systems. While recent deep learning-based VAD models have shown promising results by…

计算机视觉与模式识别 · 计算机科学 2024-03-29 Hao Shen , Lu Shi , Wanru Xu , Yigang Cen , Linna Zhang , Gaoyun An

Video anomaly detection (VAD) is an important but challenging task in computer vision. The main challenge rises due to the rarity of training samples to model all anomaly cases. Hence, semi-supervised anomaly detection methods have gotten…

计算机视觉与模式识别 · 计算机科学 2023-08-16 Mohammad Baradaran , Robert Bergevin

Anomaly detection in multivariate time series data is of paramount importance for ensuring the efficient operation of large-scale systems across diverse domains. However, accurately detecting anomalies in such data poses significant…

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…

计算机视觉与模式识别 · 计算机科学 2025-07-30 Shibo Gao , Peipei Yang , Haiyang Guo , Yangyang Liu , Yi Chen , Shuai Li , Han Zhu , Jian Xu , Xu-Yao Zhang , Linlin Huang

Visual Anomaly Detection (VAD) endeavors to pinpoint deviations from the concept of normality in visual data, widely applied across diverse domains, e.g., industrial defect inspection, and medical lesion detection. This survey…

计算机视觉与模式识别 · 计算机科学 2024-01-30 Yunkang Cao , Xiaohao Xu , Jiangning Zhang , Yuqi Cheng , Xiaonan Huang , Guansong Pang , Weiming Shen

Anomaly localization in images -- identifying regions that deviate from normal patterns -- is vital in applications such as medical diagnosis and industrial inspection. A recent trend is the use of image generation models in anomaly…

机器学习 · 统计学 2026-04-28 Teruyuki Katsuoka , Tomohiro Shiraishi , Daiki Miwa , Vo Nguyen Le Duy , Ichiro Takeuchi

Surveillance footage can catch a wide range of realistic anomalies. This research suggests using a weakly supervised strategy to avoid annotating anomalous segments in training videos, which is time consuming. In this approach only video…

计算机视觉与模式识别 · 计算机科学 2022-06-07 Kapil Deshpande , Narinder Singh Punn , Sanjay Kumar Sonbhadra , Sonali Agarwal

Traditional reconstruction-based methods have struggled to achieve competitive performance in anomaly detection. In this paper, we introduce Denoising Diffusion Anomaly Detection (DDAD), a novel denoising process for image reconstruction…

计算机视觉与模式识别 · 计算机科学 2025-04-29 Arian Mousakhan , Thomas Brox , Jawad Tayyub

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.…

计算机视觉与模式识别 · 计算机科学 2025-08-13 Shanle Yao , Ghazal Alinezhad Noghre , Armin Danesh Pazho , Hamed Tabkhi

Video Anomaly Detection (VAD), which aims to detect anomalies that deviate from expectation, has attracted increasing attention in recent years. Existing advancements in VAD primarily focus on model architectures and training strategies,…

计算机视觉与模式识别 · 计算机科学 2025-11-03 Zihao Liu , Xiaoyu Wu , Wenna Li , Linlin Yang , Shengjin Wang

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

The high performance of denoising diffusion models for image generation has paved the way for their application in unsupervised medical anomaly detection. As diffusion-based methods require a lot of GPU memory and have long sampling times,…

计算机视觉与模式识别 · 计算机科学 2024-03-19 Julia Wolleb , Florentin Bieder , Paul Friedrich , Peter Zhang , Alicia Durrer , Philippe C. Cattin

Accounting for the increased concern for public safety, automatic abnormal event detection and recognition in a surveillance scene is crucial. It is a current open study subject because of its intricacy and utility. The identification of…

计算机视觉与模式识别 · 计算机科学 2023-11-27 Anikeit Sethi , Krishanu Saini , Sai Mounika Mididoddi

Video anomaly detection aims to develop automated models capable of identifying abnormal events in surveillance videos. The benchmark setup for this task is extremely challenging due to: i) the limited size of the training sets, ii) weak…

计算机视觉与模式识别 · 计算机科学 2025-01-22 Jash Dalvi , Ali Dabouei , Gunjan Dhanuka , Min Xu

The reliability of a machine vision system for autonomous driving depends heavily on its training data distribution. When a vehicle encounters significantly different conditions, such as atypical obstacles, its perceptual capabilities can…

计算机视觉与模式识别 · 计算机科学 2026-04-17 Fabrizio Genilotti , Arianna Stropeni , Gionata Grotto , Francesco Borsatti , Manuel Barusco , Davide Dalle Pezze , Gian Antonio Susto

Video Anomaly Detection (VAD) automates the identification of unusual events, such as security threats in surveillance videos. In real-world applications, VAD models must effectively operate in cross-domain settings, identifying rare…

计算机视觉与模式识别 · 计算机科学 2024-08-12 Yashika Jain , Ali Dabouei , Min Xu