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Body-worn cameras are now commonly used for logging daily life, sports, and law enforcement activities, creating a large volume of archived footage. This paper studies the problem of classifying frames of footage according to the activity…

图像与视频处理 · 电气工程与系统科学 2019-04-22 Honglin Chen , Hao Li , Alexander Song , Matt Haberland , Osman Akar , Adam Dhillon , Tiankuang Zhou , Andrea L. Bertozzi , P. Jeffrey Brantingham

The paper provides a survey of the development of machine-learning techniques for video analysis. The survey provides a summary of the most popular deep learning methods used for human activity recognition. We discuss how popular…

计算机视觉与模式识别 · 计算机科学 2023-12-12 Marios S. Pattichis , Venkatesh Jatla , Alvaro E. Ullao Cerna

Using massive datasets to train large-scale models has emerged as a dominant approach for broad generalization in natural language and vision applications. In reinforcement learning, however, a key challenge is that available data of…

机器学习 · 计算机科学 2022-12-07 David Venuto , Sherry Yang , Pieter Abbeel , Doina Precup , Igor Mordatch , Ofir Nachum

Current state-of-the-art models for video action recognition are mostly based on expensive 3D ConvNets. This results in a need for large GPU clusters to train and evaluate such architectures. To address this problem, we present a…

计算机视觉与模式识别 · 计算机科学 2021-07-27 Quanfu Fan , Chun-Fu Chen , Hilde Kuehne , Marco Pistoia , David Cox

Weakly supervised object detection aims at reducing the amount of supervision required to train detection models. Such models are traditionally learned from images/videos labelled only with the object class and not the object bounding box.…

计算机视觉与模式识别 · 计算机科学 2019-04-04 Zhenheng Yang , Dhruv Mahajan , Deepti Ghadiyaram , Ram Nevatia , Vignesh Ramanathan

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

In recent years, deep neural network approaches have naturally extended to the video domain, in their simplest case by aggregating per-frame classifications as a baseline for action recognition. A majority of the work in this area extends…

计算机视觉与模式识别 · 计算机科学 2018-01-24 Daniel Castro , Steven Hickson , Patsorn Sangkloy , Bhavishya Mittal , Sean Dai , James Hays , Irfan Essa

Temporal action proposals are a common module in action detection pipelines today. Most current methods for training action proposal modules rely on fully supervised approaches that require large amounts of annotated temporal action…

计算机视觉与模式识别 · 计算机科学 2019-10-04 Jingwei Ji , Kaidi Cao , Juan Carlos Niebles

Instrument playing is among the most common scenes in music-related videos, which represent nowadays one of the largest sources of online videos. In order to understand the instrument-playing scenes in the videos, it is important to know…

多媒体 · 计算机科学 2018-05-08 Jen-Yu Liu , Yi-Hsuan Yang , Shyh-Kang Jeng

This work introduces verb-only representations for both recognition and retrieval of visual actions, in video. Current methods neglect legitimate semantic ambiguities between verbs, instead choosing unambiguous subsets of verbs along with…

计算机视觉与模式识别 · 计算机科学 2019-08-02 Michael Wray , Dima Damen

The remarkable success of deep learning in various domains relies on the availability of large-scale annotated datasets. However, obtaining annotations is expensive and requires great effort, which is especially challenging for videos.…

计算机视觉与模式识别 · 计算机科学 2023-07-20 Madeline C. Schiappa , Yogesh S. Rawat , Mubarak Shah

The lack of large-scale real datasets with annotations makes transfer learning a necessity for video activity understanding. We aim to develop an effective method for few-shot transfer learning for first-person action classification. We…

计算机视觉与模式识别 · 计算机科学 2021-12-09 Huseyin Coskun , Zeeshan Zia , Bugra Tekin , Federica Bogo , Nassir Navab , Federico Tombari , Harpreet Sawhney

Recently, dataset condensation has made significant progress in the image domain. Unlike images, videos possess an additional temporal dimension, which harbors considerable redundant information, making condensation even more crucial.…

计算机视觉与模式识别 · 计算机科学 2025-03-13 Yang Chen , Sheng Guo , Bo Zheng , Limin Wang

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…

计算机视觉与模式识别 · 计算机科学 2022-04-19 Rajat Modi , Aayush Jung Rana , Akash Kumar , Praveen Tirupattur , Shruti Vyas , Yogesh Singh Rawat , Mubarak Shah

We present a novel approach to leverage large unlabeled datasets by pre-training state-of-the-art deep neural networks on randomly-labeled datasets. Specifically, we train the neural networks to memorize arbitrary labels for all the samples…

机器学习 · 计算机科学 2018-11-06 Vinaychandran Pondenkandath , Michele Alberti , Sammer Puran , Rolf Ingold , Marcus Liwicki

Deep convolutional networks have achieved great success for object recognition in still images. However, for action recognition in videos, the improvement of deep convolutional networks is not so evident. We argue that there are two reasons…

计算机视觉与模式识别 · 计算机科学 2015-07-09 Limin Wang , Yuanjun Xiong , Zhe Wang , Yu Qiao

Building Automatic Speech Recognition (ASR) systems from scratch is significantly challenging, mostly due to the time-consuming and financially-expensive process of annotating a large amount of audio data with transcripts. Although several…

音频与语音处理 · 电气工程与系统科学 2020-09-22 Mengli Cheng , Chengyu Wang , Xu Hu , Jun Huang , Xiaobo Wang

Existing datasets for manually labelled query-based video summarization are costly and thus small, limiting the performance of supervised deep video summarization models. Self-supervision can address the data sparsity challenge by using a…

计算机视觉与模式识别 · 计算机科学 2023-07-06 Jia-Hong Huang , Luka Murn , Marta Mrak , Marcel Worring

Action anticipation, the task of predicting future actions from partially observed videos, is crucial for advancing intelligent systems. Unlike action recognition, which operates on fully observed videos, action anticipation must handle…

计算机视觉与模式识别 · 计算机科学 2025-06-04 Seulgi Kim , Ghazal Kaviani , Mohit Prabhushankar , Ghassan AlRegib

Many real-world applications, from sport analysis to surveillance, benefit from automatic long-term action recognition. In the current deep learning paradigm for automatic action recognition, it is imperative that models are trained and…

计算机视觉与模式识别 · 计算机科学 2023-08-23 Ombretta Strafforello , Klamer Schutte , Jan van Gemert