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Recognizing facial expressions from static images or video sequences is a widely studied but still challenging problem. The recent progresses obtained by deep neural architectures, or by ensembles of heterogeneous models, have shown that…

Computer Vision and Pattern Recognition · Computer Science 2018-10-25 Lisa Graziani , Stefano Melacci , Marco Gori

Patients with mental disorders often exhibit risky abnormal actions, such as climbing walls or hitting windows, necessitating intelligent video behavior monitoring for smart healthcare with the rising Internet of Things (IoT) technology.…

Computer Vision and Pattern Recognition · Computer Science 2024-06-10 Zengyuan Lai , Jiarui Yang , Songpengcheng Xia , Qi Wu , Zhen Sun , Wenxian Yu , Ling Pei

Video-based person recognition is challenging due to persons being blocked and blurred, and the variation of shooting angle. Previous research always focused on person recognition on still images, ignoring similarity and continuity between…

Computer Vision and Pattern Recognition · Computer Science 2021-01-01 Fangtao Li , Wenzhe Wang , Zihe Liu , Haoran Wang , Chenghao Yan , Bin Wu

The articulated and complex nature of human actions makes the task of action recognition difficult. One approach to handle this complexity is dividing it to the kinetics of body parts and analyzing the actions based on these partial…

Computer Vision and Pattern Recognition · Computer Science 2015-08-03 Amir Shahroudy , Gang Wang , Tian-Tsong Ng , Qingxiong Yang

Motion simulation, prediction and planning are foundational tasks in autonomous driving, each essential for modeling and reasoning about dynamic traffic scenarios. While often addressed in isolation due to their differing objectives, such…

Robotics · Computer Science 2026-02-03 Nan Song , Junzhe Jiang , Jingyu Li , Xiatian Zhu , Li Zhang

Physical motions are inherently continuous, and higher camera frame rates typically contribute to improved smoothness and temporal coherence. For the first time, we explore continuous representations of human motion sequences, featuring the…

Computer Vision and Pattern Recognition · Computer Science 2025-12-25 Chenghao Xu , Guangtao Lyu , Qi Liu , Jiexi Yan , Muli Yang , Cheng Deng

Temporal Action Detection (TAD) focuses on detecting pre-defined actions, while Moment Retrieval (MR) aims to identify the events described by open-ended natural language within untrimmed videos. Despite that they focus on different events,…

Computer Vision and Pattern Recognition · Computer Science 2024-07-12 Yingsen Zeng , Yujie Zhong , Chengjian Feng , Lin Ma

Understanding human actions in wild videos is an important task with a broad range of applications. In this paper we propose a novel approach named Hierarchical Attention Network (HAN), which enables to incorporate static spatial…

Computer Vision and Pattern Recognition · Computer Science 2016-07-22 Yilin Wang , Suhang Wang , Jiliang Tang , Neil O'Hare , Yi Chang , Baoxin Li

Visual motion processing is essential for humans to perceive and interact with dynamic environments. Despite extensive research in cognitive neuroscience, image-computable models that can extract informative motion flow from natural scenes…

Artificial Intelligence · Computer Science 2023-11-13 Zitang Sun , Yen-Ju Chen , Yung-hao Yang , Shin'ya Nishida

The development of generative artificial intelligence for human motion generation has expanded rapidly, necessitating a unified evaluation framework. This paper presents a detailed review of eight evaluation metrics for human motion…

Computer Vision and Pattern Recognition · Computer Science 2024-05-14 Ali Ismail-Fawaz , Maxime Devanne , Stefano Berretti , Jonathan Weber , Germain Forestier

Prior work has studied different visual modalities in isolation and developed separate architectures for recognition of images, videos, and 3D data. Instead, in this paper, we propose a single model which excels at classifying images,…

Computer Vision and Pattern Recognition · Computer Science 2022-04-01 Rohit Girdhar , Mannat Singh , Nikhila Ravi , Laurens van der Maaten , Armand Joulin , Ishan Misra

Rather than simply recognizing the action of a person individually, collective activity recognition aims to find out what a group of people is acting in a collective scene. Previ- ous state-of-the-art methods using hand-crafted potentials…

Computer Vision and Pattern Recognition · Computer Science 2017-09-21 Yongyi Tang , Peizhen Zhang , Jian-Fang Hu , Wei-Shi Zheng

Deep neural networks, including recurrent networks, have been successfully applied to human activity recognition. Unfortunately, the final representation learned by recurrent networks might encode some noise (irrelevant signal components,…

Machine Learning · Computer Science 2018-10-10 Ming Zeng , Haoxiang Gao , Tong Yu , Ole J. Mengshoel , Helge Langseth , Ian Lane , Xiaobing Liu

Human activity recognition (HAR) is fundamental in human-robot collaboration (HRC), enabling robots to respond to and dynamically adapt to human intentions. This paper introduces a HAR system combining a modular data glove equipped with…

Human sensing, which employs various sensors and advanced deep learning technologies to accurately capture and interpret human body information, has significantly impacted fields like public security and robotics. However, current human…

Computer Vision and Pattern Recognition · Computer Science 2025-02-18 Xinyan Chen , Jianfei Yang

Utilizing multi-modal data enhances scene understanding by providing complementary semantic and geometric information. Existing methods fuse features or distill knowledge from multiple modalities into a unified representation, improving…

Computer Vision and Pattern Recognition · Computer Science 2025-06-05 Jialei Chen , Xu Zheng , Danda Pani Paudel , Luc Van Gool , Hiroshi Murase , Daisuke Deguchi

We present HuMoCon, a novel motion-video understanding framework designed for advanced human behavior analysis. The core of our method is a human motion concept discovery framework that efficiently trains multi-modal encoders to extract…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Qihang Fang , Chengcheng Tang , Bugra Tekin , Shugao Ma , Yanchao Yang

A framework for unsupervised group activity analysis from a single video is here presented. Our working hypothesis is that human actions lie on a union of low-dimensional subspaces, and thus can be efficiently modeled as sparse linear…

Computer Vision and Pattern Recognition · Computer Science 2012-08-28 Zhongwei Tang , Alexey Castrodad , Mariano Tepper , Guillermo Sapiro

Sensor-based Human Activity Recognition (HAR) underpins many ubiquitous and wearable computing applications, yet current models remain limited by scarce labels, sensor heterogeneity, and weak generalization across users, devices, and…

Signal Processing · Electrical Eng. & Systems 2026-04-10 Sizhen Bian , Mengxi Liu , Lala Shakti Swarup Ray , Bo Zhou , Bin Guo , Zhiwen Yu , Thomas Ploetz , Paul Lukowicz , Siyu Yuan , Vitor Fortes Rey

Person Re-Identification (ReID) is a challenging problem in many video analytics and surveillance applications, where a person's identity must be associated across a distributed non-overlapping network of cameras. Video-based person ReID…

Computer Vision and Pattern Recognition · Computer Science 2020-10-06 Madhu Kiran , Amran Bhuiyan , Louis-Antoine Blais-Morin , Mehrsan Javan , Ismail Ben Ayed , Eric Granger