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In computer vision, action recognition refers to the act of classifying an action that is present in a given video and action detection involves locating actions of interest in space and/or time. Videos, which contain photometric…

Computer Vision and Pattern Recognition · Computer Science 2016-11-02 Soo Min Kang , Richard P. Wildes

Deep Convolutional Neural Networks (CNN) have exhibited superior performance in many visual recognition tasks including image classification, object detection, and scene label- ing, due to their large learning capacity and resistance to…

Computer Vision and Pattern Recognition · Computer Science 2016-10-12 Miao Sun , Tony X. Han , Xun Xu , Ming-Chang Liu , Ahmad Khodayari-Rostamabad

In recent years, convolutional neural networks (CNNs) have shown great performance in various fields such as image classification, pattern recognition, and multi-media compression. Two of the feature properties, local connectivity and…

Machine Learning · Computer Science 2018-07-24 Qianru Zhang , Meng Zhang , Tinghuan Chen , Zhifei Sun , Yuzhe Ma , Bei Yu

In the dynamic and evolving field of computer vision, action recognition has become a key focus, especially with the advent of sophisticated methodologies like Convolutional Neural Networks (CNNs), Convolutional 3D, Transformer, and…

Computer Vision and Pattern Recognition · Computer Science 2024-11-05 Qi Li , Tzu-Chen Chiu , Hsiang-Wei Huang , Min-Te Sun , Wei-Shinn Ku

This paper strives to recognize individual actions and group activities from videos. While existing solutions for this challenging problem explicitly model spatial and temporal relationships based on location of individual actors, we…

Computer Vision and Pattern Recognition · Computer Science 2020-03-31 Kirill Gavrilyuk , Ryan Sanford , Mehrsan Javan , Cees G. M. Snoek

This paper presents a novel keypoints-based attention mechanism for visual recognition in still images. Deep Convolutional Neural Networks (CNNs) for recognizing images with distinctive classes have shown great success, but their…

Computer Vision and Pattern Recognition · Computer Science 2021-10-26 Asish Bera , Zachary Wharton , Yonghuai Liu , Nik Bessis , Ardhendu Behera

Retailers have long been searching for ways to effectively understand their customers' behaviour in order to provide a smooth and pleasant shopping experience that attracts more customers everyday and maximises their revenue, consequently.…

Computer Vision and Pattern Recognition · Computer Science 2019-06-27 Mohammad Mahdi Kazemi Moghaddam , Ehsan Abbasnejad , Javen Shi

Reducing redundancy is crucial for improving the efficiency of video recognition models. An effective approach is to select informative content from the holistic video, yielding a popular family of dynamic video recognition methods.…

Computer Vision and Pattern Recognition · Computer Science 2023-02-08 Xu Chen , Yahong Han , Xiaohan Wang , Yifan Sun , Yi Yang

We introduce the Action Transformer model for recognizing and localizing human actions in video clips. We repurpose a Transformer-style architecture to aggregate features from the spatiotemporal context around the person whose actions we…

Computer Vision and Pattern Recognition · Computer Science 2019-05-20 Rohit Girdhar , João Carreira , Carl Doersch , Andrew Zisserman

Deep neural networks have achieved remarkable success for video-based action recognition. However, most of existing approaches cannot be deployed in practice due to the high computational cost. To address this challenge, we propose a new…

Computer Vision and Pattern Recognition · Computer Science 2020-06-18 Kun Liu , Wu Liu , Huadong Ma , Mingkui Tan , Chuang Gan

Human skeleton information is important in skeleton-based action recognition, which provides a simple and efficient way to describe human pose. However, existing skeleton-based methods focus more on the skeleton, ignoring the objects…

Computer Vision and Pattern Recognition · Computer Science 2025-01-10 Hao Wen , Ziqian Lu , Fengli Shen , Zhe-Ming Lu , Jialin Cui

Recent graph convolutional neural networks (GCNs) have shown high performance in the field of human action recognition by using human skeleton poses. However, it fails to detect human-object interaction cases successfully due to the lack of…

Computer Vision and Pattern Recognition · Computer Science 2025-09-18 Hesham M. Shehata , Mohammad Abdolrahmani

The recognition of human actions and the determination of human attributes are two tasks that call for fine-grained classification. Indeed, often rather small and inconspicuous objects and features have to be detected to tell their classes…

Computer Vision and Pattern Recognition · Computer Science 2016-08-11 Ali Diba , Ali Mohammad Pazandeh , Hamed Pirsiavash , Luc Van Gool

Tiny Actions Challenge focuses on understanding human activities in real-world surveillance. Basically, there are two main difficulties for activity recognition in this scenario. First, human activities are often recorded at a distance, and…

Computer Vision and Pattern Recognition · Computer Science 2025-12-19 Boyu Chen , Yu Qiao , Yali Wang

Spatial-temporal, channel-wise, and motion patterns are three complementary and crucial types of information for video action recognition. Conventional 2D CNNs are computationally cheap but cannot catch temporal relationships; 3D CNNs can…

Computer Vision and Pattern Recognition · Computer Science 2021-03-15 Zhengwei Wang , Qi She , Aljosa Smolic

The purpose of this study is to determine whether current video datasets have sufficient data for training very deep convolutional neural networks (CNNs) with spatio-temporal three-dimensional (3D) kernels. Recently, the performance levels…

Computer Vision and Pattern Recognition · Computer Science 2018-04-03 Kensho Hara , Hirokatsu Kataoka , Yutaka Satoh

Understanding the relationship between different parts of an image is crucial in a variety of applications, including object recognition, scene understanding, and image classification. Despite the fact that Convolutional Neural Networks…

Computer Vision and Pattern Recognition · Computer Science 2024-01-12 Seyed Rohollah Hosseyni , Sanaz Seyedin , Hasan Taheri

The rise of power-efficient embedded computers based on highly-parallel accelerators opens a number of opportunities and challenges for researchers and engineers, and paved the way to the era of edge computing. At the same time, advances in…

Distributed, Parallel, and Cluster Computing · Computer Science 2023-10-13 Paolo Burgio , Gianluca Brilli

We propose a novel approach based on deep Convolutional Neural Networks (CNN) to recognize human actions in still images by predicting the future motion, and detecting the shape and location of the salient parts of the image. We make the…

Computer Vision and Pattern Recognition · Computer Science 2017-05-15 Marjaneh Safaei , Hassan Foroosh

Recognizing human actions based on videos has became one of the most popular areas of research in computer vision in recent years. This area has many applications such as surveillance, robotics, health care, video search and human-computer…

Computer Vision and Pattern Recognition · Computer Science 2021-03-10 Aytekin Nebisoy , Saber Malekzadeh