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Anomaly detection is a common analytical task that aims to identify rare cases that differ from the typical cases that make up the majority of a dataset. When applied to the analysis of event sequence data, the task of anomaly detection can…

Human-Computer Interaction · Computer Science 2020-04-16 Shunan Guo , Zhuochen Jin , Qing Chen , David Gotz , Hongyuan Zha , Nan Cao

Robots applied in therapeutic scenarios, for instance in the therapy of individuals with Autism Spectrum Disorder, are sometimes used for imitation learning activities in which a person needs to repeat motions by the robot. To simplify the…

Robotics · Computer Science 2022-07-26 Natalia Quiroga , Alex Mitrevski , Paul G. Plöger

Human drivers can recognise fast abnormal driving situations to avoid accidents. Similar to humans, automated vehicles are supposed to perform anomaly detection. In this work, we propose the spatio-temporal graph auto-encoder for learning…

Robotics · Computer Science 2021-10-29 Julian Wiederer , Arij Bouazizi , Marco Troina , Ulrich Kressel , Vasileios Belagiannis

Adversarial attack on skeletal motion is a hot topic. However, existing researches only consider part of dynamic features when measuring distance between skeleton graph sequences, which results in poor imperceptibility. To this end, we…

Computer Vision and Pattern Recognition · Computer Science 2024-07-01 Feng Liu , Qing Xu , Qijian Zheng

Skeleton-based human action recognition is a longstanding challenge due to its complex dynamics. Some fine-grain details of the dynamics play a vital role in classification. The existing work largely focuses on designing incremental neural…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Ruijie Hou , Yanran Li , Ningyu Zhang , Yulin Zhou , Xiaosong Yang , Zhao Wang

In skeleton-based action recognition, graph convolutional networks (GCNs), which model human body skeletons using graphical components such as nodes and connections, have achieved remarkable performance recently. However, current…

Computer Vision and Pattern Recognition · Computer Science 2020-03-18 Jongmin Yu , Yongsang Yoon , Moongu Jeon

Inferring future activity information based on observed activity data is a crucial step to improve the accuracy of early activity prediction. Traditional methods based on generative adversarial networks(GAN) or joint learning frameworks can…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Tingyu Liu , Jun Huang , Chenyi Weng

Human skeleton joints are popular for action analysis since they can be easily extracted from videos to discard background noises. However, current skeleton representations do not fully benefit from machine learning with CNNs. We propose…

Computer Vision and Pattern Recognition · Computer Science 2018-08-06 Jian Liu , Naveed Akhtar , Ajmal Mian

Online continuous motion recognition is a hot topic of research since it is more practical in real life application cases. Recently, Skeleton-based approaches have become increasingly popular, demonstrating the power of using such 3D…

Computer Vision and Pattern Recognition · Computer Science 2025-11-10 Mohamed Sanim Akremi , Rim Slama , Hedi Tabia

Anomaly activities such as robbery, explosion, accidents, etc. need immediate actions for preventing loss of human life and property in real world surveillance systems. Although the recent automation in surveillance systems are capable of…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Snehashis Majhi , Srijan Das , Francois Bremond , Ratnakar Dash , Pankaj Kumar Sa

Anomaly detection in surveillance videos remains a challenging task due to the diversity of abnormal events, class imbalance, and scene-dependent visual clutter. To address these issues, we propose a robust deep learning framework that…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Mohammad Ali Etemadi Naeen , Hoda Mohammadzade , Saeed Bagheri Shouraki

The raising availability of 3D cameras and dramatic improvement of computer vision algorithms in the recent decade, accelerated the research of automatic movement assessment solutions. Such solutions can be implemented at home, using…

Computer Vision and Pattern Recognition · Computer Science 2020-07-31 Tal Hakim

This paper proposes a method for detecting anomalies in video data. A Variational Autoencoder (VAE) is used for reducing the dimensionality of video frames, generating latent space information that is comparable to low-dimensional sensory…

Computer Vision and Pattern Recognition · Computer Science 2020-03-18 Giulia Slavic , Damian Campo , Mohamad Baydoun , Pablo Marin , David Martin , Lucio Marcenaro , Carlo Regazzoni

Skeleton-based action recognition aims to project skeleton sequences to action categories, where skeleton sequences are derived from multiple forms of pre-detected points. Compared with earlier methods that focus on exploring single-form…

Computer Vision and Pattern Recognition · Computer Science 2022-07-01 Xuanhan Wang , Yan Dai , Lianli Gao , Jingkuan Song

We tackle the complex problem of detecting and recognising anomalies in surveillance videos at the frame level, utilising only video-level supervision. We introduce the novel method AnomalyCLIP, the first to combine Large Language and…

Computer Vision and Pattern Recognition · Computer Science 2023-10-05 Luca Zanella , Benedetta Liberatori , Willi Menapace , Fabio Poiesi , Yiming Wang , Elisa Ricci

In this paper, we proposed a effective but extensible residual one-dimensional convolution neural network as base network, based on the this network, we proposed four subnets to explore the features of skeleton sequences from each aspect.…

Computer Vision and Pattern Recognition · Computer Science 2018-08-01 Yangyang Xu , Lei Wang

Anomalies represent deviations from the intended system operation and can lead to decreased efficiency as well as partial or complete system failure. As the causes of anomalies are often unknown due to complex system dynamics, efficient…

Machine Learning · Computer Science 2021-08-31 Benjamin Lindemann , Benjamin Maschler , Nada Sahlab , Michael Weyrich

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…

Computer Vision and Pattern Recognition · Computer Science 2022-06-07 Kapil Deshpande , Narinder Singh Punn , Sanjay Kumar Sonbhadra , Sonali Agarwal

Complex systems which can be represented in the form of static and dynamic graphs arise in different fields, e.g. communication, engineering and industry. One of the interesting problems in analysing dynamic network structures is to monitor…

Machine Learning · Computer Science 2020-11-13 Anna Malinovskaya , Philipp Otto , Torben Peters

With rapidly increasing deployment of surveillance cameras, the reliable methods for automatically analyzing the surveillance video and recognizing special events are demanded by different practical applications. This paper proposes a novel…

Computer Vision and Pattern Recognition · Computer Science 2018-10-29 Michael Ying Yang , Wentong Liao , Chun Yang , Yanpeng Cao , Bodo Rosenhahn
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