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We propose an effective approach for spatio-temporal action localization in realistic videos. The approach first detects proposals at the frame-level and scores them with a combination of static and motion CNN features. It then tracks…

Computer Vision and Pattern Recognition · Computer Science 2015-09-29 Philippe Weinzaepfel , Zaid Harchaoui , Cordelia Schmid

Ever-increasing smartphone-generated video content demands intelligent techniques to edit and enhance videos on power-constrained devices. Most of the best performing algorithms for video understanding tasks like action recognition,…

Computer Vision and Pattern Recognition · Computer Science 2021-10-05 Rishubh Parihar , Gaurav Ramola , Ranajit Saha , Ravi Kini , Aniket Rege , Sudha Velusamy

Leveraging temporal synchronization and association within sight and sound is an essential step towards robust localization of sounding objects. To this end, we propose a space-time memory network for sounding object localization in videos.…

Computer Vision and Pattern Recognition · Computer Science 2021-11-11 Sizhe Li , Yapeng Tian , Chenliang Xu

Deep spatiotemporal models are used in a variety of computer vision tasks, such as action recognition and video object segmentation. Currently, there is a limited understanding of what information is captured by these models in their…

Computer Vision and Pattern Recognition · Computer Science 2022-06-08 Matthew Kowal , Mennatullah Siam , Md Amirul Islam , Neil D. B. Bruce , Richard P. Wildes , Konstantinos G. Derpanis

Human action recognition is an important task in computer vision. Extracting discriminative spatial and temporal features to model the spatial and temporal evolutions of different actions plays a key role in accomplishing this task. In this…

Computer Vision and Pattern Recognition · Computer Science 2016-11-21 Sijie Song , Cuiling Lan , Junliang Xing , Wenjun Zeng , Jiaying Liu

Computer vision relies on labeled datasets for training and evaluation in detecting and recognizing objects. The popular computer vision program, YOLO ("You Only Look Once"), has been shown to accurately detect objects in many major image…

Computer Vision and Pattern Recognition · Computer Science 2019-01-01 Caleb Tung , Matthew R. Kelleher , Ryan J. Schlueter , Binhan Xu , Yung-Hsiang Lu , George K. Thiruvathukal , Yen-Kuang Chen , Yang Lu

Recognizing human actions in video sequences, known as Human Action Recognition (HAR), is a challenging task in pattern recognition. While Convolutional Neural Networks (ConvNets) have shown remarkable success in image recognition, they are…

Computer Vision and Pattern Recognition · Computer Science 2023-09-22 Nguyen Huu Phong , Bernardete Ribeiro

In this work, we propose an approach to the spatiotemporal localisation (detection) and classification of multiple concurrent actions within temporally untrimmed videos. Our framework is composed of three stages. In stage 1, appearance and…

Computer Vision and Pattern Recognition · Computer Science 2016-08-05 Suman Saha , Gurkirt Singh , Michael Sapienza , Philip H. S. Torr , Fabio Cuzzolin

Designing a technique for the automatic analysis of different actions in videos in order to detect the presence of interested activities is of high significance nowadays. In this paper, we explore a robust and dynamic appearance technique…

Computer Vision and Pattern Recognition · Computer Science 2019-02-21 Abdul Basit

Wearable technologies are enabling plenty of new applications of computer vision, from life logging to health assistance. Many of them are required to recognize the elements of interest in the scene captured by the camera. This work studies…

Computer Vision and Pattern Recognition · Computer Science 2020-09-11 Alberto Sabater , Luis Montesano , Ana C. Murillo

Wearable cameras are becoming more and more popular in several applications, increasing the interest of the research community in developing approaches for recognizing actions from the first-person point of view. An open challenge in…

Computer Vision and Pattern Recognition · Computer Science 2020-12-08 Mirco Planamente , Andrea Bottino , Barbara Caputo

Moments capture a huge part of our lives. Accurate recognition of these moments is challenging due to the diverse and complex interpretation of the moments. Action recognition refers to the act of classifying the desired action/activity…

Computer Vision and Pattern Recognition · Computer Science 2018-09-14 Ankit Shah , Harini Kesavamoorthy , Poorva Rane , Pramati Kalwad , Alexander Hauptmann , Florian Metze

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

This work strives for the classification and localization of human actions in videos, without the need for any labeled video training examples. Where existing work relies on transferring global attribute or object information from seen to…

Computer Vision and Pattern Recognition · Computer Science 2021-04-13 Pascal Mettes , William Thong , Cees G. M. Snoek

Detecting and segmenting individual objects, regardless of their category, is crucial for many applications such as action detection or robotic interaction. While this problem has been well-studied under the classic formulation of…

Computer Vision and Pattern Recognition · Computer Science 2020-04-02 Achal Dave , Pavel Tokmakov , Deva Ramanan

Beyond possessing large enough size to feed data hungry machines (eg, transformers), what attributes measure the quality of a dataset? Assuming that the definitions of such attributes do exist, how do we quantify among their relative…

Computer Vision and Pattern Recognition · Computer Science 2022-04-19 Rajat Modi , Aayush Jung Rana , Akash Kumar , Praveen Tirupattur , Shruti Vyas , Yogesh Singh Rawat , Mubarak Shah

We introduce the task of spatially localizing narrated interactions in videos. Key to our approach is the ability to learn to spatially localize interactions with self-supervision on a large corpus of videos with accompanying transcribed…

Computer Vision and Pattern Recognition · Computer Science 2021-12-03 Reuben Tan , Bryan A. Plummer , Kate Saenko , Hailin Jin , Bryan Russell

Two-stream Convolutional Networks (ConvNets) have shown strong performance for human action recognition in videos. Recently, Residual Networks (ResNets) have arisen as a new technique to train extremely deep architectures. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2016-11-08 Christoph Feichtenhofer , Axel Pinz , Richard P. Wildes

Object detection is considered one of the most challenging problems in this field of computer vision, as it involves the combination of object classification and object localization within a scene. Recently, deep neural networks (DNNs) have…

Computer Vision and Pattern Recognition · Computer Science 2017-09-19 Mohammad Javad Shafiee , Brendan Chywl , Francis Li , Alexander Wong

Action recognition is an important problem in multimedia understanding. This paper addresses this problem by building an expressive compositional action model. We model one action instance in the video with an ensemble of spatio-temporal…

Computer Vision and Pattern Recognition · Computer Science 2015-02-03 Xiaodan Liang , Liang Lin , Liangliang Cao