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Abnormal event detection (AED) in urban surveillance videos has multiple challenges. Unlike other computer vision problems, the AED is not solely dependent on the content of frames. It also depends on the appearance of the objects and their…

Computer Vision and Pattern Recognition · Computer Science 2020-11-20 Ali Atghaei , Soroush Ziaeinejad , Mohammad Rahmati

We propose an efficient abnormal event detection model based on a lightweight masked auto-encoder (AE) applied at the video frame level. The novelty of the proposed model is threefold. First, we introduce an approach to weight tokens based…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Nicolae-Catalin Ristea , Florinel-Alin Croitoru , Radu Tudor Ionescu , Marius Popescu , Fahad Shahbaz Khan , Mubarak Shah

Detecting anomalies in crowded scenes is challenging due to severe inter-person occlusions and highly dynamic, context-dependent motion patterns. Existing approaches often struggle to adapt to varying crowd densities and lack interpretable…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Fatima AlGhamdi , Omar Alharbi , Abdullah Aldwyish , Raied Aljadaany , Muhammad Kamran J Khan , Huda Alamri

Moving object detection is important in computer vision. Event-based cameras are bio-inspired cameras that work by mimicking the working of the human eye. These cameras have multiple advantages over conventional frame-based cameras, like…

Computer Vision and Pattern Recognition · Computer Science 2022-01-13 Anindya Mondal , Mayukhmali Das

Human detection in videos plays an important role in various real-life applications. Most traditional approaches depend on utilizing handcrafted features, which are problem-dependent and optimal for specific tasks. Moreover, they are highly…

Machine Learning · Computer Science 2026-01-06 Nouar AlDahoul , Aznul Qalid Md Sabri , Ali Mohammed Mansoor

As in other estimation scenarios, likelihood based estimation in the normal mixture set-up is highly non-robust against model misspecification and presence of outliers (apart from being an ill-posed optimization problem). A robust…

Methodology · Statistics 2023-12-20 Soumya Chakraborty , Ayanendranath Basu , Abhik Ghosh

Social video anomaly is an observation in video streams that does not conform to a common pattern of dataset's behaviour. Social video anomaly detection plays a critical role in applications from e-commerce to e-learning. Traditionally,…

Computer Vision and Pattern Recognition · Computer Science 2024-01-18 Chengkun He , Xiangmin Zhou , Chen Wang , Iqbal Gondal , Jie Shao , Xun Yi

The proliferation and variety of Internet of Things devices means that they have increasingly become a viable target for malicious users. This has created a need for anomaly detection algorithms that can work across multiple devices. This…

Cryptography and Security · Computer Science 2022-05-10 Lincoln Best , Ernest Foo , Hui Tian

In this study, we formulate the task of Video Anomaly Detection as a probabilistic analysis of object bounding boxes. We hypothesize that the representation of objects via their bounding boxes only, can be sufficient to successfully…

Computer Vision and Pattern Recognition · Computer Science 2024-11-11 Mia Siemon , Thomas B. Moeslund , Barry Norton , Kamal Nasrollahi

This paper proposes to use set features for detecting anomalies in samples that consist of unusual combinations of normal elements. Many leading methods discover anomalies by detecting an unusual part of a sample. For example,…

Computer Vision and Pattern Recognition · Computer Science 2025-03-20 Niv Cohen , Issar Tzachor , Yedid Hoshen

We develop a novel framework for single-scene video anomaly localization that allows for human-understandable reasons for the decisions the system makes. We first learn general representations of objects and their motions (using deep…

Computer Vision and Pattern Recognition · Computer Science 2022-12-16 Ashish Singh , Michael J. Jones , Erik Learned-Miller

It is challenging to detect the anomaly in crowded scenes for quite a long time. In this paper, a self-supervised framework, abnormal event detection network (AED-Net), which is composed of PCAnet and kernel principal component analysis…

Computer Vision and Pattern Recognition · Computer Science 2019-03-29 Tian Wang , Zichen Miao , Yuxin Chen , Yi Zhou , Guangcun Shan , Hichem Snoussi

We introduce an advanced, swift pattern recognition strategy for various multiple robotics during curve negotiation. This method, leveraging a sophisticated k-means clustering-enhanced Support Vector Machine algorithm, distinctly…

Robotics · Computer Science 2024-05-07 Rui Liu , Xuanzhen Xu , Yuwei Shen , Armando Zhu , Chang Yu , Tianjian Chen , Ye Zhang

Anomaly detection is an important step in the management and monitoring of data centers and cloud computing platforms. The ability to detect anomalous virtual machines before real failures occur results in reduced downtime while operations…

Distributed, Parallel, and Cluster Computing · Computer Science 2018-10-08 Roman Nikiforov

Video anomaly detection research is generally evaluated on short, isolated benchmark videos only a few minutes long. However, in real-world environments, security cameras observe the same scene for months or years at a time, and the notion…

Computer Vision and Pattern Recognition · Computer Science 2024-04-12 Zhengye Yang , Richard Radke

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…

Computer Vision and Pattern Recognition · Computer Science 2023-11-27 Anikeit Sethi , Krishanu Saini , Sai Mounika Mididoddi

Clustering analysis is one of the critical tasks in machine learning. Traditionally, clustering has been an independent task, separate from outlier detection. Due to the fact that the performance of clustering can be significantly eroded by…

Machine Learning · Computer Science 2022-08-12 Jiahao Deng , Eli T. Brown

We describe a method for modeling spatial context to enable video anomaly detection. The main idea is to discover regions that share similar object-level activities by clustering joint object attributes using Gaussian mixture models. We…

Computer Vision and Pattern Recognition · Computer Science 2025-01-16 Zhengye Yang , Richard J. Radke

Developing a technique for the automatic analysis of surveillance videos in order to identify the presence of violence is of broad interest. In this work, we propose a deep neural network for the purpose of recognizing violent videos. A…

Computer Vision and Pattern Recognition · Computer Science 2017-09-20 Swathikiran Sudhakaran , Oswald Lanz

Anomaly detection in surveillance videos is a challenging task due to the diversity of anomalous video content and duration. In this paper, we consider video anomaly detection as a regression problem with respect to anomaly scores of video…

Computer Vision and Pattern Recognition · Computer Science 2021-04-16 Boyang Wan , Yuming Fang , Xue Xia , Jiajie Mei