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Consider a set of n images of a scene with dynamic objects captured with a static or a handheld camera. Let the temporal order in which these images are captured be unknown. There can be n! possibilities for the temporal order in which…

计算机视觉与模式识别 · 计算机科学 2020-10-23 Gagan Kanojia , Shanmuganathan Raman

Models based on deep convolutional networks have dominated recent image interpretation tasks; we investigate whether models which are also recurrent, or "temporally deep", are effective for tasks involving sequences, visual and otherwise.…

计算机视觉与模式识别 · 计算机科学 2016-06-02 Jeff Donahue , Lisa Anne Hendricks , Marcus Rohrbach , Subhashini Venugopalan , Sergio Guadarrama , Kate Saenko , Trevor Darrell

We investigate architectures of discriminatively trained deep Convolutional Networks (ConvNets) for action recognition in video. The challenge is to capture the complementary information on appearance from still frames and motion between…

计算机视觉与模式识别 · 计算机科学 2014-11-13 Karen Simonyan , Andrew Zisserman

Video sequences contain rich dynamic patterns, such as dynamic texture patterns that exhibit stationarity in the temporal domain, and action patterns that are non-stationary in either spatial or temporal domain. We show that a…

机器学习 · 统计学 2017-05-31 Jianwen Xie , Song-Chun Zhu , Ying Nian Wu

Recently, the recognition task of spontaneous facial micro-expressions has attracted much attention with its various real-world applications. Plenty of handcrafted or learned features have been employed for a variety of classifiers and…

计算机视觉与模式识别 · 计算机科学 2019-01-16 Zhaoqiang Xia , Xiaopeng Hong , Xingyu Gao , Xiaoyi Feng , Guoying Zhao

Robust video scene classification models should capture the spatial (pixel-wise) and temporal (frame-wise) characteristics of a video effectively. Transformer models with self-attention which are designed to get contextualized…

计算机视觉与模式识别 · 计算机科学 2021-10-28 Saurabh Sahu , Palash Goyal

Spatial-temporal graph modeling is an important task to analyze the spatial relations and temporal trends of components in a system. Existing approaches mostly capture the spatial dependency on a fixed graph structure, assuming that the…

机器学习 · 计算机科学 2019-06-04 Zonghan Wu , Shirui Pan , Guodong Long , Jing Jiang , Chengqi Zhang

Developing a technique for the automatic analysis of surveillance videos in order to identify the presence of violence is of broad interest. In this work, we propose a deep neural network for the purpose of recognizing violent videos. A…

计算机视觉与模式识别 · 计算机科学 2017-09-20 Swathikiran Sudhakaran , Oswald Lanz

Spatio-temporal representations in frame sequences play an important role in the task of action recognition. Previously, a method of using optical flow as a temporal information in combination with a set of RGB images that contain spatial…

计算机视觉与模式识别 · 计算机科学 2018-08-02 Myunggi Lee , Seungeui Lee , Sungjoon Son , Gyutae Park , Nojun Kwak

The CNN-encoding of features from entire videos for the representation of human actions has rarely been addressed. Instead, CNN work has focused on approaches to fuse spatial and temporal networks, but these were typically limited to…

计算机视觉与模式识别 · 计算机科学 2016-11-22 Ali Diba , Vivek Sharma , Luc Van Gool

We present an automatic method to describe clinically useful information about scanning, and to guide image interpretation in ultrasound (US) videos of the fetal heart. Our method is able to jointly predict the visibility, viewing plane,…

计算机视觉与模式识别 · 计算机科学 2017-07-04 Weilin Huang , Christopher P. Bridge , J. Alison Noble , Andrew Zisserman

Accuracy of depth estimation from static images has been significantly improved recently, by exploiting hierarchical features from deep convolutional neural networks (CNNs). Compared with static images, vast information exists among video…

计算机视觉与模式识别 · 计算机科学 2019-08-13 Haokui Zhang , Chunhua Shen , Ying Li , Yuanzhouhan Cao , Yu Liu , Youliang Yan

Automatically recognizing surgical gestures is a crucial step towards a thorough understanding of surgical skill. Possible areas of application include automatic skill assessment, intra-operative monitoring of critical surgical steps, and…

计算机视觉与模式识别 · 计算机科学 2019-07-29 Isabel Funke , Sebastian Bodenstedt , Florian Oehme , Felix von Bechtolsheim , Jürgen Weitz , Stefanie Speidel

This paper addresses the problem of how to exploit spatio-temporal information available in videos to improve the object detection precision. We propose a two stage object detector called FANet based on short-term spatio-temporal feature…

计算机视觉与模式识别 · 计算机科学 2020-11-09 Daniel Cores , Víctor M. Brea , Manuel Mucientes

Convolutional neural networks (CNNs) have been extensively applied for image recognition problems giving state-of-the-art results on recognition, detection, segmentation and retrieval. In this work we propose and evaluate several deep…

计算机视觉与模式识别 · 计算机科学 2015-04-14 Joe Yue-Hei Ng , Matthew Hausknecht , Sudheendra Vijayanarasimhan , Oriol Vinyals , Rajat Monga , George Toderici

Space-time video super-resolution (STVSR) aims to increase the spatial and temporal resolutions of low-resolution and low-frame-rate videos. Recently, deformable convolution based methods have achieved promising STVSR performance, but they…

计算机视觉与模式识别 · 计算机科学 2021-05-03 Gang Xu , Jun Xu , Zhen Li , Liang Wang , Xing Sun , Ming-Ming Cheng

In this paper, we investigate the challenge of spatio-temporal video prediction task, which involves generating future video frames based on historical spatio-temporal observation streams. Existing approaches typically utilize external…

计算机视觉与模式识别 · 计算机科学 2025-01-15 Hao Wu , Fan Xu , Chong Chen , Xian-Sheng Hua , Xiao Luo , Haixin Wang

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…

计算机视觉与模式识别 · 计算机科学 2020-06-18 Kun Liu , Wu Liu , Huadong Ma , Mingkui Tan , Chuang Gan

Temporal action localization is an important task of computer vision. Though many methods have been proposed, it still remains an open question how to predict the temporal location of action segments precisely. Most state-of-the-art works…

计算机视觉与模式识别 · 计算机科学 2019-02-15 Ke Yang , Xiaolong Shen , Peng Qiao , Shijie Li , Dongsheng Li , Yong Dou

Facial expressions are one of the most powerful ways for depicting specific patterns in human behavior and describing human emotional state. Despite the impressive advances of affective computing over the last decade, automatic video-based…

计算机视觉与模式识别 · 计算机科学 2021-01-18 Thomas Teixeira , Eric Granger , Alessandro Lameiras Koerich