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Deep convolutional networks are widely used in video action recognition. 3D convolutions are one prominent approach to deal with the additional time dimension. While 3D convolutions typically lead to higher accuracies, the inner workings of…

Computer Vision and Pattern Recognition · Computer Science 2020-06-24 Alexandros Stergiou , Georgios Kapidis , Grigorios Kalliatakis , Christos Chrysoulas , Ronald Poppe , Remco Veltkamp

Effective processing of video input is essential for the recognition of temporally varying events such as human actions. Motivated by the often distinctive temporal characteristics of actions in either horizontal or vertical direction, we…

Computer Vision and Pattern Recognition · Computer Science 2020-06-24 Alexandros Stergiou , Ronald Poppe

Depth estimation is a crucial step for 3D reconstruction with panorama images in recent years. Panorama images maintain the complete spatial information but introduce distortion with equirectangular projection. In this paper, we propose an…

Computer Vision and Pattern Recognition · Computer Science 2022-04-04 Chuanqing Zhuang , Zhengda Lu , Yiqun Wang , Jun Xiao , Ying Wang

We propose a novel method of deep spatial matching (DSM) for image retrieval. Initial ranking is based on image descriptors extracted from convolutional neural network activations by global pooling, as in recent state-of-the-art work.…

Computer Vision and Pattern Recognition · Computer Science 2019-11-19 Oriane Siméoni , Yannis Avrithis , Ondrej Chum

Existing action recognition methods mainly focus on joint and bone information in human body skeleton data due to its robustness to complex backgrounds and dynamic characteristics of the environments. In this paper, we combine body skeleton…

Computer Vision and Pattern Recognition · Computer Science 2021-06-07 Umar Asif , Deval Mehta , Stefan von Cavallar , Jianbin Tang , Stefan Harrer

In this paper, we are interested in self-supervised learning the motion cues in videos using dynamic motion filters for a better motion representation to finally boost human action recognition in particular. Thus far, the vision community…

Computer Vision and Pattern Recognition · Computer Science 2019-04-26 Ali Diba , Vivek Sharma , Luc Van Gool , Rainer Stiefelhagen

Action parsing in videos with complex scenes is an interesting but challenging task in computer vision. In this paper, we propose a generic 3D convolutional neural network in a multi-task learning manner for effective Deep Action Parsing…

Computer Vision and Pattern Recognition · Computer Science 2016-02-11 Li Liu , Yi Zhou , Ling Shao

Convolutional Neural Network (CNN) features have been successfully employed in recent works as an image descriptor for various vision tasks. But the inability of the deep CNN features to exhibit invariance to geometric transformations and…

Computer Vision and Pattern Recognition · Computer Science 2015-04-27 Konda Reddy Mopuri , R. Venkatesh Babu

Despite the fact that notable improvements have been made recently in the field of feature extraction and classification, human action recognition is still challenging, especially in images, in which, unlike videos, there is no motion.…

Computer Vision and Pattern Recognition · Computer Science 2020-03-24 Sina Mohammadi , Sina Ghofrani Majelan , Shahriar B. Shokouhi

It remains a challenge to efficiently extract spatialtemporal information from skeleton sequences for 3D human action recognition. Although most recent action recognition methods are based on Recurrent Neural Networks which present…

Computer Vision and Pattern Recognition · Computer Science 2017-06-08 Hong Liu , Juanhui Tu , Mengyuan Liu

Defining methods for the automatic understanding of gestures is of paramount importance in many application contexts and in Virtual Reality applications for creating more natural and easy-to-use human-computer interaction methods. In this…

Computer Vision and Pattern Recognition · Computer Science 2020-09-03 Katia Lupinetti , Andrea Ranieri , Franca Giannini , Marina Monti

The gesture recognition using motion capture data and depth sensors has recently drawn more attention in vision recognition. Currently most systems only classify dataset with a couple of dozens different actions. Moreover, feature…

Computer Vision and Pattern Recognition · Computer Science 2014-09-02 Kyunghyun Cho , Xi Chen

Human action recognition in videos is a critical task with significant implications for numerous applications, including surveillance, sports analytics, and healthcare. The challenge lies in creating models that are both precise in their…

Computer Vision and Pattern Recognition · Computer Science 2024-03-12 Yufei Xie

Nowadays, Deep Neural Networks are among the main tools used in various sciences. Convolutional Neural Network is a special type of DNN consisting of several convolution layers, each followed by an activation function and a pooling layer.…

Computer Vision and Pattern Recognition · Computer Science 2020-09-17 Hossein Gholamalinezhad , Hossein Khosravi

This paper examines use of dynamic probabilistic networks (DPN) for human action recognition. The actions of lifting objects and walking in the room, sitting in the room and neutral standing pose were used for testing the classification.…

Computer Vision and Pattern Recognition · Computer Science 2016-10-21 Anne Veenendaal , Eddie Jones , Zhao Gang , Elliot Daly , Sumalini Vartak , Rahul Patwardhan

Action recognition is a fundamental task in video understanding. Existing methods typically extract unified features to process all actions in one video, which makes it challenging to model the interactions between different objects in…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Tianci Wu , Guangming Zhu , Jiang Lu , Siyuan Wang , Ning Wang , Nuoye Xiong , Zhang Liang

Reconstructing 3D human shape and pose from monocular images is challenging despite the promising results achieved by the most recent learning-based methods. The commonly occurred misalignment comes from the facts that the mapping from…

Computer Vision and Pattern Recognition · Computer Science 2020-12-08 Hongwen Zhang , Jie Cao , Guo Lu , Wanli Ouyang , Zhenan Sun

Graph Convolution Network (GCN) has been successfully used for 3D human pose estimation in videos. However, it is often built on the fixed human-joint affinity, according to human skeleton. This may reduce adaptation capacity of GCN to…

Computer Vision and Pattern Recognition · Computer Science 2021-09-16 Junhao Zhang , Yali Wang , Zhipeng Zhou , Tianyu Luan , Zhe Wang , Yu Qiao

Image guided depth completion aims to recover per-pixel dense depth maps from sparse depth measurements with the help of aligned color images, which has a wide range of applications from robotics to autonomous driving. However, the 3D…

Computer Vision and Pattern Recognition · Computer Science 2022-10-20 Xin Liu , Xiaofei Shao , Bo Wang , Yali Li , Shengjin Wang

In this paper, we address the problem of image retrieval by learning images representation based on the activations of a Convolutional Neural Network. We present an end-to-end trainable network architecture that exploits a novel multi-scale…

Computer Vision and Pattern Recognition · Computer Science 2020-04-27 Federico Vaccaro , Marco Bertini , Tiberio Uricchio , Alberto Del Bimbo