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Recently, mid-level features have shown promising performance in computer vision. Mid-level features learned by incorporating class-level information are potentially more discriminative than traditional low-level local features. In this…

Computer Vision and Pattern Recognition · Computer Science 2014-09-16 Pichao Wang , Wanqing Li , Philip Ogunbona , Zhimin Gao , Hanling Zhang

With crimes on the rise all around the world, video surveillance is becoming more important day by day. Due to the lack of human resources to monitor this increasing number of cameras manually new computer vision algorithms to perform lower…

Computer Vision and Pattern Recognition · Computer Science 2017-09-05 Vandit Gajjar , Ayesha Gurnani , Yash Khandhediya

Appearance features have been widely used in video anomaly detection even though they contain complex entangled factors. We propose a new method to model the normal patterns of human movements in surveillance video for anomaly detection…

Computer Vision and Pattern Recognition · Computer Science 2019-04-19 Romero Morais , Vuong Le , Truyen Tran , Budhaditya Saha , Moussa Mansour , Svetha Venkatesh

Human activity discovery aims to cluster the activities performed by humans without any prior information on what defines each activity. Most methods presented in human activity recognition are supervised, where there are labeled inputs to…

Computer Vision and Pattern Recognition · Computer Science 2022-10-19 Parham Hadikhani , Daphne Teck Ching Lai , Wee-Hong Ong

Detecting and recognizing human action in videos with crowded scenes is a challenging problem due to the complex environment and diversity events. Prior works always fail to deal with this problem in two aspects: (1) lacking utilizing…

Computer Vision and Pattern Recognition · Computer Science 2020-10-19 Li Yuan , Yichen Zhou , Shuning Chang , Ziyuan Huang , Yunpeng Chen , Xuecheng Nie , Tao Wang , Jiashi Feng , Shuicheng Yan

Skeleton-based human action recognition has attracted a lot of research attention during the past few years. Recent works attempted to utilize recurrent neural networks to model the temporal dependencies between the 3D positional…

Computer Vision and Pattern Recognition · Computer Science 2017-06-27 Jun Liu , Amir Shahroudy , Dong Xu , Alex C. Kot , Gang Wang

Recognizing human actions is a core challenge for autonomous systems as they directly share the same space with humans. Systems must be able to recognize and assess human actions in real-time. In order to train corresponding data-driven…

Computer Vision and Pattern Recognition · Computer Science 2019-04-22 Dennis Ludl , Thomas Gulde , Cristóbal Curio

Pose-based anomaly detection is a video-analysis technique for detecting anomalous events or behaviors by examining human pose extracted from the video frames. Utilizing pose data alleviates privacy and ethical issues. Also,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Ghazal Alinezhad Noghre , Armin Danesh Pazho , Vinit Katariya , Hamed Tabkhi

In this paper we are interested in analyzing behaviour in crowded public places at the level of holistic motion. Our aim is to learn, without user input, strong scene priors or labelled data, the scope of "normal behaviour" for a particular…

Computer Vision and Pattern Recognition · Computer Science 2013-09-26 Ognjen Arandjelović

We propose a method for multi-person detection and 2-D pose estimation that achieves state-of-art results on the challenging COCO keypoints task. It is a simple, yet powerful, top-down approach consisting of two stages. In the first stage,…

Computer Vision and Pattern Recognition · Computer Science 2017-04-18 George Papandreou , Tyler Zhu , Nori Kanazawa , Alexander Toshev , Jonathan Tompson , Chris Bregler , Kevin Murphy

The research on human activity recognition has provided novel solutions to many applications like healthcare, sports, and user profiling. Considering the complex nature of human activities, it is still challenging even after effective and…

Human-Computer Interaction · Computer Science 2023-07-11 Ranjit Kolkar , Geetha V

In this work, we present an appearance based human activity recognition system. It uses background modeling to segment the foreground object and extracts useful discriminative features for representing activities performed by humans and…

Robotics · Computer Science 2016-02-11 Bappaditya Mandal

Hand gesture recognition has been granted as one of the emerging fields in research today providing a natural way of communication between man and a machine. Gestures are some forms of body motions which a person expresses when doing a work…

Image and Video Processing · Electrical Eng. & Systems 2018-12-27 Biswarup Ganguly , Amit Konar

Abnormal Human Behavior Detection (AHBD) under special scenarios is becoming increasingly crucial. While YOLO-based detection methods excel in real-time tasks, they remain hindered by challenges including small objects, task conflicts, and…

Computer Vision and Pattern Recognition · Computer Science 2025-08-18 Xinyi Yin , Wenbo Yuan , Xuecheng Wu , Liangyu Fu , Danlei Huang

This study examined whether a single ceiling-mounted camera could be used to capture fine-grained learning behaviours in co-located practical learning. In undergraduate nursing simulations, teachers first identified seven observable…

Human-Computer Interaction · Computer Science 2026-03-17 Xinyu Li , Linxuan Zhao , Roberto Martinez-Maldonado , Dragan Gasevic , Lixiang Yan

Human action recognition from well-segmented 3D skeleton data has been intensively studied and has been attracting an increasing attention. Online action detection goes one step further and is more challenging, which identifies the action…

Computer Vision and Pattern Recognition · Computer Science 2016-07-27 Yanghao Li , Cuiling Lan , Junliang Xing , Wenjun Zeng , Chunfeng Yuan , Jiaying Liu

Visual Human Activity Recognition (HAR) and data fusion with other sensors can help us at tracking the behavior and activity of underground miners with little obstruction. Existing models, such as Single Shot Detector (SSD), trained on the…

Computer Vision and Pattern Recognition · Computer Science 2019-05-10 Schalk Wilhelm Pienaar , Reza Malekian

This work presents an efficient algorithmic framework for real-time identification, classification, and evaluation of human physiotherapy exercises using mobile devices. The proposed method interprets a kinetic movement as a sequence of…

Computer Vision and Pattern Recognition · Computer Science 2025-12-12 Stylianos Kandylakis , Christos Orfanopoulos , Georgios Siolas , Panayiotis Tsanakas

Recognition of human actions and associated interactions with objects and the environment is an important problem in computer vision due to its potential applications in a variety of domains. The most versatile methods can generalize to…

Computer Vision and Pattern Recognition · Computer Science 2019-12-10 Behnoosh Parsa , Athma Narayanan , Behzad Dariush

Prison facilities, mental correctional institutions, sports bars and places of public protest are prone to sudden violence and conflicts. Surveillance systems play an important role in mitigation of hostile behavior and improvement of…

Human-Computer Interaction · Computer Science 2016-07-06 Amol Patwardhan , Gerald Knapp