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This paper introduces a novel approach to Social Group Activity Recognition (SoGAR) using Self-supervised Transformers network that can effectively utilize unlabeled video data. To extract spatio-temporal information, we created local and…

Computer Vision and Pattern Recognition · Computer Science 2024-11-20 Naga VS Raviteja Chappa , Pha Nguyen , Alexander H Nelson , Han-Seok Seo , Xin Li , Page Daniel Dobbs , Khoa Luu

Action Detection is a complex task that aims to detect and classify human actions in video clips. Typically, it has been addressed by processing fine-grained features extracted from a video classification backbone. Recently, thanks to the…

Computer Vision and Pattern Recognition · Computer Science 2021-03-02 Matteo Tomei , Lorenzo Baraldi , Simone Calderara , Simone Bronzin , Rita Cucchiara

Summarizing video content is an important task in many applications. This task can be defined as the computation of the ordered list of actions present in a video. Such a list could be extracted using action detection algorithms. However,…

Machine Learning · Computer Science 2020-11-11 Guillaume Vaudaux-Ruth , Adrien Chan-Hon-Tong , Catherine Achard

Knowledge distillation has been shown to be a powerful model compression approach to facilitate the deployment of pre-trained language models in practice. This paper focuses on task-agnostic distillation. It produces a compact pre-trained…

Computation and Language · Computer Science 2023-02-21 Chen Liang , Haoming Jiang , Zheng Li , Xianfeng Tang , Bin Yin , Tuo Zhao

Generating robust and reliable correspondences across images is a fundamental task for a diversity of applications. To capture context at both global and local granularity, we propose ASpanFormer, a Transformer-based detector-free matcher…

Computer Vision and Pattern Recognition · Computer Science 2022-08-31 Hongkai Chen , Zixin Luo , Lei Zhou , Yurun Tian , Mingmin Zhen , Tian Fang , David Mckinnon , Yanghai Tsin , Long Quan

The landscape of video recognition has evolved significantly, shifting from traditional Convolutional Neural Networks (CNNs) to Transformer-based architectures for improved accuracy. While 3D CNNs have been effective at capturing…

Computer Vision and Pattern Recognition · Computer Science 2025-07-21 Hayat Ullah , Muhammad Ali Shafique , Abbas Khan , Arslan Munir

Automatic recognition of surgical phases in surgical videos is a fundamental task in surgical workflow analysis. In this report, we propose a Transformer-based method that utilizes calibrated confidence scores for a 2-stage inference…

Computer Vision and Pattern Recognition · Computer Science 2022-06-16 Yunfan Li , Vinayak Shenoy , Prateek Prasanna , I. V. Ramakrishnan , Haibin Ling , Himanshu Gupta

In vision-based action recognition, spatio-temporal features from different modalities are used for recognizing activities. Temporal modeling is a long challenge of action recognition. However, there are limited methods such as pre-computed…

Computer Vision and Pattern Recognition · Computer Science 2023-02-06 Elham Shabaninia , Hossein Nezamabadi-pour , Fatemeh Shafizadegan

While learning from demonstrations is powerful for acquiring visuomotor policies, high-performance imitation without large demonstration datasets remains challenging for tasks requiring precise, long-horizon manipulation. This paper…

Robotics · Computer Science 2024-11-12 Lars Ankile , Anthony Simeonov , Idan Shenfeld , Pulkit Agrawal

Automated surgical step recognition is an important task that can significantly improve patient safety and decision-making during surgeries. Existing state-of-the-art methods for surgical step recognition either rely on separate,…

Computer Vision and Pattern Recognition · Computer Science 2023-07-22 Nisarg A. Shah , Shameema Sikder , S. Swaroop Vedula , Vishal M. Patel

Temporal human action detection aims to identify and localize action segments within untrimmed videos, serving as a pivotal task in video understanding. Despite the progress achieved by prior architectures like CNN and Transformer models,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-13 Yicheng Qiu , Keiji Yanai

Most current pipelines for spatio-temporal action localization connect frame-wise or clip-wise detection results to generate action proposals, where only local information is exploited and the efficiency is hindered by dense per-frame…

Computer Vision and Pattern Recognition · Computer Science 2020-08-20 Yuxi Li , Weiyao Lin , John See , Ning Xu , Shugong Xu , Ke Yan , Cong Yang

Spatio-temporal action detection in videos is typically addressed in a fully-supervised setup with manual annotation of training videos required at every frame. Since such annotation is extremely tedious and prohibits scalability, there is…

Computer Vision and Pattern Recognition · Computer Science 2018-11-29 Guilhem Chéron , Jean-Baptiste Alayrac , Ivan Laptev , Cordelia Schmid

Temporal action localization aims to identify the boundaries and categories of actions in videos, such as scoring a goal in a football match. Single-frame supervision has emerged as a labor-efficient way to train action localizers as it…

Human-Computer Interaction · Computer Science 2023-12-11 Changjian Chen , Jiashu Chen , Weikai Yang , Haoze Wang , Johannes Knittel , Xibin Zhao , Steffen Koch , Thomas Ertl , Shixia Liu

Soccer analytics rely on two data sources: the player positions on the pitch and the sequences of events they perform. With around 2000 ball events per game, their precise and exhaustive annotation based on a monocular video stream remains…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Jeremie Ochin , Guillaume Devineau , Bogdan Stanciulescu , Sotiris Manitsaris

Striking a balance between precision and efficiency presents a prominent challenge in the bird's-eye-view (BEV) 3D object detection. Although previous camera-based BEV methods achieved remarkable performance by incorporating long-term…

Computer Vision and Pattern Recognition · Computer Science 2024-01-09 Haowen Zheng , Dong Cao , Jintao Xu , Rui Ai , Weihao Gu , Yang Yang , Yanyan Liang

Since the wide employment of deep learning frameworks in video salient object detection, the accuracy of the recent approaches has made stunning progress. These approaches mainly adopt the sequential modules, based on optical flow or…

Computer Vision and Pattern Recognition · Computer Science 2021-03-18 Yi Tang , Yuanman Li , Wenbin Zou

Traditional video action detectors typically adopt the two-stage pipeline, where a person detector is first employed to generate actor boxes and then 3D RoIAlign is used to extract actor-specific features for classification. This detection…

Computer Vision and Pattern Recognition · Computer Science 2024-04-16 Tao Wu , Mengqi Cao , Ziteng Gao , Gangshan Wu , Limin Wang

Temporal action localization aims to predict the boundary and category of each action instance in untrimmed long videos. Most of previous methods based on anchors or proposals neglect the global-local context interaction in entire video…

Computer Vision and Pattern Recognition · Computer Science 2022-09-16 Yizheng Ouyang , Tianjin Zhang , Weibo Gu , Hongfa Wang

Human motion prediction is a cornerstone of human-robot collaboration (HRC), as robots need to infer the future movements of human workers based on past motion cues to proactively plan their motion, ensuring safety in close collaboration…

Computer Vision and Pattern Recognition · Computer Science 2024-09-20 Sibo Tian , Minghui Zheng , Xiao Liang