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In this paper, we propose a method of human activity recognition with high throughput from raw accelerometer data applying a deep recurrent neural network (DRNN), and investigate various architectures and its combination to find the best…

Computer Vision and Pattern Recognition · Computer Science 2016-11-14 Masaya Inoue , Sozo Inoue , Takeshi Nishida

We propose an action recognition framework using Gen- erative Adversarial Networks. Our model involves train- ing a deep convolutional generative adversarial network (DCGAN) using a large video activity dataset without la- bel information.…

Computer Vision and Pattern Recognition · Computer Science 2018-01-23 Unaiza Ahsan , Chen Sun , Irfan Essa

Self-supervised learning has been successfully applied to pre-train video representations, which aims at efficient adaptation from pre-training domain to downstream tasks. Existing approaches merely leverage contrastive loss to learn…

Computer Vision and Pattern Recognition · Computer Science 2021-08-24 Yuanze Lin , Xun Guo , Yan Lu

Motion has shown to be useful for video understanding, where motion is typically represented by optical flow. However, computing flow from video frames is very time-consuming. Recent works directly leverage the motion vectors and residuals…

Computer Vision and Pattern Recognition · Computer Science 2019-05-09 Zheng Shou , Xudong Lin , Yannis Kalantidis , Laura Sevilla-Lara , Marcus Rohrbach , Shih-Fu Chang , Zhicheng Yan

Human motion modelling is a classical problem at the intersection of graphics and computer vision, with applications spanning human-computer interaction, motion synthesis, and motion prediction for virtual and augmented reality. Following…

Computer Vision and Pattern Recognition · Computer Science 2017-05-09 Julieta Martinez , Michael J. Black , Javier Romero

Action recognition is a critical task for social robots to meaningfully engage with their environment. 3D human skeleton-based action recognition is an attractive research area in recent years. Although, the existing approaches are good at…

Computer Vision and Pattern Recognition · Computer Science 2021-01-01 Hui Feng , Shanshan Wang , Shuzhi Sam Ge

Recently, there has been a remarkable increase in the interest towards skeleton-based action recognition within the research community, owing to its various advantageous features, including computational efficiency, representative features,…

Computer Vision and Pattern Recognition · Computer Science 2023-02-01 Ayman Ali , Ekkasit Pinyoanuntapong , Pu Wang , Mohsen Dorodchi

Real-Time Networks (RTNs) provide latency guarantees for time-critical applications and it aims to support different traffic categories via various scheduling mechanisms. Those scheduling mechanisms rely on a precise network performance…

Networking and Internet Architecture · Computer Science 2021-04-07 Chien-Cheng Wu

Over the past few years, there has been significant interest in video action recognition systems and models. However, direct comparison of accuracy and computational performance results remain clouded by differing training environments,…

When we say a person is texting, can you tell the person is walking or sitting? Emphatically, no. In order to solve this incomplete representation problem, this paper presents a sub-action descriptor for detailed action detection. The…

Computer Vision and Pattern Recognition · Computer Science 2017-10-11 Cheng-Bin Jin , Shengzhe Li , Hakil Kim

Deep learning has been demonstrated to achieve excellent results for image classification and object detection. However, the impact of deep learning on video analysis (e.g. action detection and recognition) has been limited due to…

Computer Vision and Pattern Recognition · Computer Science 2017-08-03 Rui Hou , Chen Chen , Mubarak Shah

For action recognition learning, 2D CNN-based methods are efficient but may yield redundant features due to applying the same 2D convolution kernel to each frame. Recent efforts attempt to capture motion information by establishing…

Computer Vision and Pattern Recognition · Computer Science 2021-03-24 Mingyu Wu , Boyuan Jiang , Donghao Luo , Junchi Yan , Yabiao Wang , Ying Tai , Chengjie Wang , Jilin Li , Feiyue Huang , Xiaokang Yang

The ability to accurately identify human activities is essential for developing automatic rehabilitation and sports training systems. In this paper, large-scale exercise motion data obtained from a forearm-worn wearable sensor are…

Computer Vision and Pattern Recognition · Computer Science 2017-07-25 Terry Taewoong Um , Vahid Babakeshizadeh , Dana Kulić

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

For the two-stream style methods in action recognition, fusing the two streams' predictions is always by the weighted averaging scheme. This fusion method with fixed weights lacks of pertinence to different action videos and always needs…

Computer Vision and Pattern Recognition · Computer Science 2017-09-14 Jiagang Zhu , Wei Zou , Zheng Zhu

Deep convolutional networks have achieved great success for visual recognition in still images. However, for action recognition in videos, the advantage over traditional methods is not so evident. This paper aims to discover the principles…

Computer Vision and Pattern Recognition · Computer Science 2016-08-03 Limin Wang , Yuanjun Xiong , Zhe Wang , Yu Qiao , Dahua Lin , Xiaoou Tang , Luc Van Gool

Deep learning models have achieved state-of-the- art performance in recognizing human activities, but often rely on utilizing background cues present in typical computer vision datasets that predominantly have a stationary camera. If these…

Robotics · Computer Science 2017-09-20 Fahimeh Rezazadegan , Sareh Shirazi , Ben Upcroft , Michael Milford

Infrared (IR) imaging has the potential to enable more robust action recognition systems compared to visible spectrum cameras due to lower sensitivity to lighting conditions and appearance variability. While the action recognition task on…

Computer Vision and Pattern Recognition · Computer Science 2017-05-19 Zhuolin Jiang , Viktor Rozgic , Sancar Adali

Understanding accurate information on human behaviours is one of the most important tasks in machine intelligence. Human Activity Recognition that aims to understand human activities from a video is a challenging task due to various…

Computer Vision and Pattern Recognition · Computer Science 2021-06-25 Ivaxi Sheth

We present convolutional neural networks for the tasks of keypoint (pose) prediction and action classification of people in unconstrained images. Our approach involves training an R-CNN detector with loss functions depending on the task…

Computer Vision and Pattern Recognition · Computer Science 2014-06-23 Georgia Gkioxari , Bharath Hariharan , Ross Girshick , Jitendra Malik