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Multimodal time series (MTS) anomaly detection is crucial for maintaining the safety and stability of working devices (e.g., water treatment system and spacecraft), whose data are characterized by multivariate time series with diverse…

Machine Learning · Computer Science 2023-10-18 Chaoyue Ding , Shiliang Sun , Jing Zhao

Deep-Learning-based video recognition has shown promising improvements along with the development of large-scale datasets and spatiotemporal network architectures. In image recognition, learning spatially invariant features is a key factor…

Computer Vision and Pattern Recognition · Computer Science 2020-08-14 Taeoh Kim , Hyeongmin Lee , MyeongAh Cho , Ho Seong Lee , Dong Heon Cho , Sangyoun Lee

Robust online multi-person tracking requires the correct associations of online detection responses with existing trajectories. We address this problem by developing a novel appearance modeling approach to provide accurate appearance…

Computer Vision and Pattern Recognition · Computer Science 2017-03-14 Min Yang , Yunde Jia

Modeling and recognition of surgical activities poses an interesting research problem. Although a number of recent works studied automatic recognition of surgical activities, generalizability of these works across different tasks and…

Computer Vision and Pattern Recognition · Computer Science 2020-08-17 Duygu Sarikaya , Pierre Jannin

Dynamic skeletal data, represented as the 2D/3D coordinates of human joints, has been widely studied for human action recognition due to its high-level semantic information and environmental robustness. However, previous methods heavily…

Computer Vision and Pattern Recognition · Computer Science 2020-07-08 Lei Shi , Yifan Zhang , Jian Cheng , Hanqing Lu

Objective: Surgical activity recognition is a fundamental step in computer-assisted interventions. This paper reviews the state-of-the-art in methods for automatic recognition of fine-grained gestures in robotic surgery focusing on recent…

Computer Vision and Pattern Recognition · Computer Science 2021-02-02 Beatrice van Amsterdam , Matthew J. Clarkson , Danail Stoyanov

Existing approaches for spatio-temporal action detection in videos are limited by the spatial extent and temporal duration of the actions. In this paper, we present a modular system for spatio-temporal action detection in untrimmed security…

Computer Vision and Pattern Recognition · Computer Science 2018-11-26 Joshua Gleason , Rajeev Ranjan , Steven Schwarcz , Carlos D. Castillo , Jun-Chen Cheng , Rama Chellappa

Action detection is an essential and challenging task, especially for densely labelled datasets of untrimmed videos. The temporal relation is complex in those datasets, including challenges like composite action, and co-occurring action.…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Rui Dai , Srijan Das , Kumara Kahatapitiya , Michael S. Ryoo , Francois Bremond

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

The goal of multi-object tracking (MOT) is to detect and track all objects in a scene across frames, while maintaining a unique identity for each object. Most existing methods rely on the spatial-temporal motion features and appearance…

Computer Vision and Pattern Recognition · Computer Science 2024-11-22 Yanzhao Fang

Recent advancements in video generation have been greatly driven by video diffusion models, with camera motion control emerging as a crucial challenge in creating view-customized visual content. This paper introduces trajectory attention, a…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Zeqi Xiao , Wenqi Ouyang , Yifan Zhou , Shuai Yang , Lei Yang , Jianlou Si , Xingang Pan

Fine-grained action detection is an important task with numerous applications in robotics and human-computer interaction. Existing methods typically utilize a two-stage approach including extraction of local spatio-temporal features…

Computer Vision and Pattern Recognition · Computer Science 2019-11-11 Khoi-Nguyen C. Mac , Dhiraj Joshi , Raymond A. Yeh , Jinjun Xiong , Rogerio S. Feris , Minh N. Do

Video action recognition, which is topical in computer vision and video analysis, aims to allocate a short video clip to a pre-defined category such as brushing hair or climbing stairs. Recent works focus on action recognition with deep…

Computer Vision and Pattern Recognition · Computer Science 2019-08-28 Yuqi Huo , Xiaoli Xu , Yao Lu , Yulei Niu , Zhiwu Lu , Ji-Rong Wen

Deepfake videos are causing growing concerns among communities due to their ever-increasing realism. Naturally, automated detection of forged Deepfake videos is attracting a proportional amount of interest of researchers. Current methods…

Computer Vision and Pattern Recognition · Computer Science 2025-02-13 Yunzhuo Chen , Naveed Akhtar , Nur Al Hasan Haldar , Ajmal Mian

Micro-action is an imperceptible non-verbal behaviour characterised by low-intensity movement. It offers insights into the feelings and intentions of individuals and is important for human-oriented applications such as emotion recognition…

Computer Vision and Pattern Recognition · Computer Science 2024-06-04 Dan Guo , Kun Li , Bin Hu , Yan Zhang , Meng Wang

Weakly supervised temporal action localization is a challenging vision task due to the absence of ground-truth temporal locations of actions in the training videos. With only video-level supervision during training, most existing methods…

Computer Vision and Pattern Recognition · Computer Science 2021-03-26 Ashraful Islam , Chengjiang Long , Richard Radke

Recent works have shown that combining object detection and tracking tasks, in the case of video data, results in higher performance for both tasks, but they require a high frame-rate as a strict requirement for performance. This is…

Computer Vision and Pattern Recognition · Computer Science 2020-05-26 Bharti Munjal , Abdul Rafey Aftab , Sikandar Amin , Meltem D. Brandlmaier , Federico Tombari , Fabio Galasso

Human doing actions will result in WiFi distortion, which is widely explored for action recognition, such as the elderly fallen detection, hand sign language recognition, and keystroke estimation. As our best survey, past work recognizes…

Signal Processing · Electrical Eng. & Systems 2019-04-29 Fei Wang , Yunpeng Song , Jimuyang Zhang , Jinsong Han , Dong Huang

Facial micro-expressions are sudden involuntary minute muscle movements which reveal true emotions that people try to conceal. Spotting a micro-expression and recognizing it is a major challenge owing to its short duration and intensity.…

Computer Vision and Pattern Recognition · Computer Science 2019-04-22 Sauradip Nag , Ayan Kumar Bhunia , Aishik Konwer , Partha Pratim Roy

One-shot skeleton action recognition, which aims to learn a skeleton action recognition model with a single training sample, has attracted increasing interest due to the challenge of collecting and annotating large-scale skeleton action…

Computer Vision and Pattern Recognition · Computer Science 2024-02-07 Siyuan Yang , Jun Liu , Shijian Lu , Er Meng Hwa , Alex C. Kot