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We propose TAL-Net, an improved approach to temporal action localization in video that is inspired by the Faster R-CNN object detection framework. TAL-Net addresses three key shortcomings of existing approaches: (1) we improve receptive…

Computer Vision and Pattern Recognition · Computer Science 2018-04-23 Yu-Wei Chao , Sudheendra Vijayanarasimhan , Bryan Seybold , David A. Ross , Jia Deng , Rahul Sukthankar

Thompson sampling is a well-known approach for balancing exploration and exploitation in reinforcement learning. It requires the posterior distribution of value-action functions to be maintained; this is generally intractable for tasks that…

Machine Learning · Computer Science 2021-02-09 Siddharth Aravindan , Wee Sun Lee

Convolutional neural networks (CNNs) are deep learning frameworks which are well-known for their notable performance in classification tasks. Hence, many skeleton-based action recognition and segmentation (SBARS) algorithms benefit from…

Machine Learning · Computer Science 2019-11-13 Babak Hosseini , Romain Montagne , Barbara Hammer

Temporal action localization aims to localize starting and ending time with action category. Limited by GPU memory, mainstream methods pre-extract features for each video. Therefore, feature quality determines the upper bound of detection…

Computer Vision and Pattern Recognition · Computer Science 2021-06-25 Zhiwu Qing , Xiang Wang , Ziyuan Huang , Yutong Feng , Shiwei Zhang , jianwen Jiang , Mingqian Tang , Changxin Gao , Nong Sang

Ordering has been extensively studied in many visualization applications, such as axis and matrix reordering, for the simple reason that the order will greatly impact the perceived pattern of data. Many quality metrics concerning data…

Machine Learning · Computer Science 2024-12-19 Zehua Yu , Weihan Zhang , Sihan Pan , Jun Tao

Unsupervised learning with functional data is an emerging paradigm of machine learning research with applications to computer vision, climate modeling and physical systems. A natural way of modeling functional data is by learning operators…

Machine Learning · Computer Science 2023-02-22 Jacob H. Seidman , Georgios Kissas , George J. Pappas , Paris Perdikaris

Real-time and online action localization in a video is a critical yet highly challenging problem. Accurate action localization requires the utilization of both temporal and spatial information. Recent attempts achieve this by using…

Computer Vision and Pattern Recognition · Computer Science 2021-11-08 Kalana Abeywardena , Shechem Sumanthiran , Sakuna Jayasundara , Sachira Karunasena , Ranga Rodrigo , Peshala Jayasekara

Generative models such as Variational Auto Encoders (VAEs) and Generative Adversarial Networks (GANs) are typically trained for a fixed prior distribution in the latent space, such as uniform or Gaussian. After a trained model is obtained,…

Machine Learning · Computer Science 2018-01-26 Eirikur Agustsson , Alexander Sage , Radu Timofte , Luc Van Gool

Vision-Language Navigation requires the agent to follow natural language instructions to reach a specific target. The large discrepancy between seen and unseen environments makes it challenging for the agent to generalize well. Previous…

Computer Vision and Pattern Recognition · Computer Science 2022-09-13 Yujie Lu , Huiliang Zhang , Ping Nie , Weixi Feng , Wenda Xu , Xin Eric Wang , William Yang Wang

Transformer networks are effective at modeling long-range contextual information and have recently demonstrated exemplary performance in the natural language processing domain. Conventionally, the temporal action proposal generation (TAPG)…

Computer Vision and Pattern Recognition · Computer Science 2021-05-26 Lining Wang , Haosen Yang , Wenhao Wu , Hongxun Yao , Hujie Huang

Recurrent Neural Networks (RNNs) are widely used for online regression due to their ability to generalize nonlinear temporal dependencies. As an RNN model, Long-Short-Term-Memory Networks (LSTMs) are commonly preferred in practice, as these…

Machine Learning · Computer Science 2021-06-01 N. Mert Vural , Fatih Ilhan , Selim F. Yilmaz , Salih Ergüt , Suleyman S. Kozat

This technical report presents an overview of our solution used in the submission to ActivityNet Challenge 2020 Task 1 (\textbf{temporal action localization/detection}). Temporal action localization requires to not only precisely locate the…

Computer Vision and Pattern Recognition · Computer Science 2020-08-27 Haisheng Su , Jinyuan Feng , Hao Shao , Zhenyu Jiang , Manyuan Zhang , Wei Wu , Yu Liu , Hongsheng Li , Junjie Yan

Deep neural network (DNN) based approaches hold significant potential for reinforcement learning (RL) and have already shown remarkable gains over state-of-art methods in a number of applications. The effectiveness of DNN methods can be…

Machine Learning · Statistics 2017-06-01 Henghui Zhu , Feng Nan , Ioannis Paschalidis , Venkatesh Saligrama

Modern Generative Adversarial Networks are capable of creating artificial, photorealistic images from latent vectors living in a low-dimensional learned latent space. It has been shown that a wide range of images can be projected into this…

Computer Vision and Pattern Recognition · Computer Science 2020-09-15 Jonas Wulff , Antonio Torralba

We propose a novel method for temporally pooling frames in a video for the task of human action recognition. The method is motivated by the observation that there are only a small number of frames which, together, contain sufficient…

Computer Vision and Pattern Recognition · Computer Science 2017-06-27 Amlan Kar , Nishant Rai , Karan Sikka , Gaurav Sharma

Dynamical systems describe how a physical system evolves over time. Physical processes can evolve faster or slower in different environmental conditions. We use time-warping as rescaling the time in a model of a physical system. This thesis…

Machine Learning · Computer Science 2026-05-12 Jonathon Hirschi

Recently, temporal action localization (TAL), i.e., finding specific action segments in untrimmed videos, has attracted increasing attentions of the computer vision community. State-of-the-art solutions for TAL involves evaluating the…

Computer Vision and Pattern Recognition · Computer Science 2021-03-01 Peisen Zhao , Lingxi Xie , Chen Ju , Ya Zhang , Yanfeng Wang , Qi Tian

Deep Recurrent Neural Network (RNN) has gained popularity in many sequence classification tasks. Beyond predicting a correct class for each data instance, data scientists also want to understand what differentiating factors in the data have…

Machine Learning · Computer Science 2019-01-18 Chuan Wang , Takeshi Onishi , Keiichi Nemoto , Kwan-Liu Ma

Bayesian Neural Networks (BNN) have emerged as a crucial approach for interpreting ML predictions. By sampling from the posterior distribution, data scientists may estimate the uncertainty of an inference. Unfortunately many inference…

Machine Learning · Computer Science 2023-11-23 Thomas D. Ahle , Sahar Karimi , Peter Tak Peter Tang

Deep learning revolutionized data science, and recently its popularity has grown exponentially, as did the amount of papers employing deep networks. Vision tasks, such as human pose estimation, did not escape from this trend. There is a…

Computer Vision and Pattern Recognition · Computer Science 2020-09-25 Stéphane Lathuilière , Pablo Mesejo , Xavier Alameda-Pineda , Radu Horaud