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This paper presents a novel end-to-end method for the problem of skeleton-based unsupervised human action recognition. We propose a new architecture with a convolutional autoencoder that uses graph Laplacian regularization to model the…

Computer Vision and Pattern Recognition · Computer Science 2022-07-22 Giancarlo Paoletti , Jacopo Cavazza , Cigdem Beyan , Alessio Del Bue

Action recognition is a key algorithmic part of emerging on-the-edge smart video surveillance and security systems. Skeleton-based action recognition is an attractive approach which, instead of using RGB pixel data, relies on human pose…

Computer Vision and Pattern Recognition · Computer Science 2022-01-19 Justin Sanchez , Christopher Neff , Hamed Tabkhi

Spatio-temporal information is key to resolve occlusion and depth ambiguity in 3D pose estimation. Previous methods have focused on either temporal contexts or local-to-global architectures that embed fixed-length spatio-temporal…

Computer Vision and Pattern Recognition · Computer Science 2020-10-21 Junfa Liu , Juan Rojas , Zhijun Liang , Yihui Li , Yisheng Guan

Accurate online multiple-camera vehicle tracking is essential for intelligent transportation systems, autonomous driving, and smart city applications. Like single-camera multiple-object tracking, it is commonly formulated as a graph problem…

Computer Vision and Pattern Recognition · Computer Science 2024-10-04 Fabian Herzog , Johannes Gilg , Philipp Wolters , Torben Teepe , Gerhard Rigoll

Fine-grained human action recognition (FHAR) is challenging because visually similar actions differ by subtle spatio-temporal cues. Many recent systems enhance discriminability with extra modalities (e.g., pose, text, optical flow), but…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Imtiaz Ul Hassan , Nik Bessis , Ardhendu Behera

We propose a novel solution for the cashier problem. Current cashier system/Point of Sale (POS) terminals can be inefficient, cumbersome and time-consuming for the users. There is a need for a solution dependent on modern technology and…

Machine Learning · Computer Science 2020-11-13 Farid Khan

The task of skeleton-based action recognition remains a core challenge in human-centred scene understanding due to the multiple granularities and large variation in human motion. Existing approaches typically employ a single neural…

Computer Vision and Pattern Recognition · Computer Science 2021-08-11 Tailin Chen , Desen Zhou , Jian Wang , Shidong Wang , Yu Guan , Xuming He , Errui Ding

Skeleton-based action recognition has made great progress recently, but many problems still remain unsolved. For example, most of the previous methods model the representations of skeleton sequences without abundant spatial structure…

Computer Vision and Pattern Recognition · Computer Science 2018-12-04 Chenyang Si , Ya Jing , Wei Wang , Liang Wang , Tieniu Tan

Accurate assessment of patient actions plays a crucial role in healthcare as it contributes significantly to disease progression monitoring and treatment effectiveness. However, traditional approaches to assess patient actions often rely on…

Computer Vision and Pattern Recognition · Computer Science 2025-02-26 Youssef Mourchid , Rim Slama

The use of gait for person identification has important advantages such as being non-invasive, unobtrusive, not requiring cooperation and being less likely to be obscured compared to other biometrics. Existing methods for gait recognition…

Computer Vision and Pattern Recognition · Computer Science 2021-12-20 Adrian Cosma , Emilian Radoi

With online payment platforms being ubiquitous and important, fraud transaction detection has become the key for such platforms, to ensure user account safety and platform security. In this work, we present a novel method for detecting…

Machine Learning · Computer Science 2020-03-30 Longfei Li , Ziqi Liu , Chaochao Chen , Ya-Lin Zhang , Jun Zhou , Xiaolong Li

We propose iMoT, an innovative Transformer-based inertial odometry method that retrieves cross-modal information from motion and rotation modalities for accurate positional estimation. Unlike prior work, during the encoding of the motion…

Machine Learning · Computer Science 2025-01-14 Son Minh Nguyen , Linh Duy Tran , Duc Viet Le , Paul J. M Havinga

Skeleton-based action recognition is a hotspot in image processing. A key challenge of this task lies in its dependence on large, manually labeled datasets whose acquisition is costly and time-consuming. This paper devises a novel,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Hichem Sahbi

Assistive devices, such as exoskeletons and prostheses, have revolutionized the field of rehabilitation and mobility assistance. Efficiently detecting transitions between different activities, such as walking, stair ascending and…

Maritime intelligent transportation systems (MITS) are essential for ensuring navigation safety and efficiency in busy waterways. However, accurate vessel trajectory prediction remains challenging due to the limitations of single-source…

Computer Vision and Pattern Recognition · Computer Science 2026-05-27 Yuxu Lu , Dong Yang , Xiaoyu Li , Mengwei Bao , Congcong Zhao

Anticipating future actions based on spatiotemporal observations is essential in video understanding and predictive computer vision. Moreover, a model capable of anticipating the future has important applications, it can benefit…

Computer Vision and Pattern Recognition · Computer Science 2023-03-21 Tsung-Ming Tai , Giuseppe Fiameni , Cheng-Kuang Lee , Simon See , Oswald Lanz

3D skeleton-based action recognition (3D SAR) has gained significant attention within the computer vision community, owing to the inherent advantages offered by skeleton data. As a result, a plethora of impressive works, including those…

Computer Vision and Pattern Recognition · Computer Science 2024-01-30 Bin Ren , Mengyuan Liu , Runwei Ding , Hong Liu

Gait recognition is a promising video-based biometric for identifying individual walking patterns from a long distance. At present, most gait recognition methods use silhouette images to represent a person in each frame. However, silhouette…

Computer Vision and Pattern Recognition · Computer Science 2021-08-31 Torben Teepe , Ali Khan , Johannes Gilg , Fabian Herzog , Stefan Hörmann , Gerhard Rigoll

Vehicular platooning promises transformative improvements in transportation efficiency and safety through the coordination of multi-vehicle formations enabled by Vehicle-to-Everything (V2X) communication. However, the distributed nature of…

Cryptography and Security · Computer Science 2025-12-24 Konstantinos Kalogiannis , Ahmed Mohamed Hussain , Hexu Li , Panos Papadimitratos

Graph convolutional networks (GCNs) have been very successful in skeleton-based human action recognition where the sequence of skeletons is modeled as a graph. However, most of the GCN-based methods in this area train a deep feed-forward…

Computer Vision and Pattern Recognition · Computer Science 2021-04-28 Negar Heidari , Alexandros Iosifidis