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Most of human actions consist of complex temporal compositions of more simple actions. Action recognition tasks usually relies on complex handcrafted structures as features to represent the human action model. Convolutional Neural Nets…

Computer Vision and Pattern Recognition · Computer Science 2015-12-15 Mahdyar Ravanbakhsh , Hossein Mousavi , Mohammad Rastegari , Vittorio Murino , Larry S. Davis

We propose a method for human action recognition, one that can localize the spatiotemporal regions that `define' the actions. This is a challenging task due to the subtlety of human actions in video and the co-occurrence of contextual…

Computer Vision and Pattern Recognition · Computer Science 2019-04-12 Yang Wang , Vinh Tran , Gedas Bertasius , Lorenzo Torresani , Minh Hoai

We present a novel approach for discovering human interactions in videos. Activity understanding techniques usually require a large number of labeled examples, which are not available in many practical cases. Here, we focus on recovering…

Computer Vision and Pattern Recognition · Computer Science 2015-02-16 Mehran Khodabandeh , Arash Vahdat , Guang-Tong Zhou , Hossein Hajimirsadeghi , Mehrsan Javan Roshtkhari , Greg Mori , Stephen Se

Visual attributes, from simple objects (e.g., backpacks, hats) to soft-biometrics (e.g., gender, height, clothing) have proven to be a powerful representational approach for many applications such as image description and human…

Computer Vision and Pattern Recognition · Computer Science 2018-07-11 Nikolaos Sarafianos , Theodore Giannakopoulos , Christophoros Nikou , Ioannis A. Kakadiaris

This paper classifies human action sequences from videos using a machine translation model. In contrast to classical human action classification which outputs a set of actions, our method output a sequence of action in the chronological…

Computer Vision and Pattern Recognition · Computer Science 2019-10-08 Yan Bin Ng , Basura Fernando

Human action recognition refers to automatic recognizing human actions from a video clip. In reality, there often exist multiple human actions in a video stream. Such a video stream is often weakly-annotated with a set of relevant human…

Computer Vision and Pattern Recognition · Computer Science 2019-02-07 Qian Wang , Ke Chen

In this paper, a novel human action recognition technique from video is presented. Any action of human is a combination of several micro action sequences performed by one or more body parts of the human. The proposed approach uses…

Computer Vision and Pattern Recognition · Computer Science 2015-10-16 Satyabrata Maity , Debotosh Bhattacharjee , Amlan Chakrabarti

Attribute representations became relevant in image recognition and word spotting, providing support under the presence of unbalance and disjoint datasets. However, for human activity recognition using sequential data from on-body sensors,…

Computer Vision and Pattern Recognition · Computer Science 2018-02-05 Fernando Moya Rueda , Gernot A. Fink

Inspired by recent advances in neural machine translation, that jointly align and translate using encoder-decoder networks equipped with attention, we propose an attentionbased LSTM model for human activity recognition. Our model jointly…

Computer Vision and Pattern Recognition · Computer Science 2017-09-01 Atousa Torabi , Leonid Sigal

Many computer vision algorithms employ subspace models to represent data. The Low-rank representation (LRR) has been successfully applied in subspace clustering for which data are clustered according to their subspace structures. The…

Computer Vision and Pattern Recognition · Computer Science 2015-04-09 Boyue Wang , Yongli Hu , Junbin Gao , Yanfeng Sun , Baocai Yin

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

Human activities are naturally structured as hierarchies unrolled over time. For action prediction, temporal relations in event sequences are widely exploited by current methods while their semantic coherence across different levels of…

Computer Vision and Pattern Recognition · Computer Science 2020-08-24 Romero Morais , Vuong Le , Truyen Tran , Svetha Venkatesh

In this paper, we propose a new approach to under-stand actions in egocentric videos that exploits the semantics of object interactions at both frame and temporal levels. At the frame level, we use a region-based approach that takes as…

Computer Vision and Pattern Recognition · Computer Science 2021-04-26 Alejandro Cartas , Petia Radeva , Mariella Dimiccoli

This paper presents an approach for recognizing human activities from extreme low resolution (e.g., 16x12) videos. Extreme low resolution recognition is not only necessary for analyzing actions at a distance but also is crucial for enabling…

Computer Vision and Pattern Recognition · Computer Science 2018-02-06 Michael S. Ryoo , Kiyoon Kim , Hyun Jong Yang

Video activity recognition by deep neural networks is impressive for many classes. However, it falls short of human performance, especially for challenging to discriminate activities. Humans differentiate these complex activities by…

Computer Vision and Pattern Recognition · Computer Science 2022-01-12 Joseph Chrol-Cannon , Andrew Gilbert , Ranko Lazic , Adithya Madhusoodanan , Frank Guerin

In multi-camera video surveillance, it is challenging to represent videos from different cameras properly and fuse them efficiently for specific applications such as human activity recognition and clustering. In this paper, a novel…

Computer Vision and Pattern Recognition · Computer Science 2016-06-14 Boyue Wang , Yongli Hu , Junbin Gao , Yanfeng Sun , Baocai Yin

In this paper, we design a Collaborative-Hierarchical Sparse and Low-Rank (C-HiSLR) model that is natural for recognizing human emotion in visual data. Previous attempts require explicit expression components, which are often unavailable…

Computer Vision and Pattern Recognition · Computer Science 2016-11-17 Xiang Xiang , Minh Dao , Gregory D. Hager , Trac D. Tran

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

We propose an action classification algorithm which uses Locality-constrained Linear Coding (LLC) to capture discriminative information of human body variations in each spatiotemporal subsequence of a video sequence. Our proposed method…

Computer Vision and Pattern Recognition · Computer Science 2014-09-23 Hossein Rahmani , Arif Mahmood , Du Huynh , Ajmal Mian

Human Action Recognition (HAR) aims to understand human behavior and assign a label to each action. It has a wide range of applications, and therefore has been attracting increasing attention in the field of computer vision. Human actions…

Computer Vision and Pattern Recognition · Computer Science 2022-06-22 Zehua Sun , Qiuhong Ke , Hossein Rahmani , Mohammed Bennamoun , Gang Wang , Jun Liu