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Many interesting events in the real world are rare making preannotated machine learning ready videos a rarity in consequence. Thus, temporal activity detection models that are able to learn from a few examples are desirable. In this paper,…

计算机视觉与模式识别 · 计算机科学 2020-04-02 Huijuan Xu , Ximeng Sun , Eric Tzeng , Abir Das , Kate Saenko , Trevor Darrell

Automatic action identification from video and kinematic data is an important machine learning problem with applications ranging from robotics to smart health. Most existing works focus on identifying coarse actions such as running,…

Few-shot action recognition in videos is challenging for its lack of supervision and difficulty in generalizing to unseen actions. To address this task, we propose a simple yet effective method, called knowledge prompting, which leverages…

计算机视觉与模式识别 · 计算机科学 2022-11-23 Yuheng Shi , Xinxiao Wu , Hanxi Lin

In this paper a pure-attention bottom-up approach, called ViGAT, that utilizes an object detector together with a Vision Transformer (ViT) backbone network to derive object and frame features, and a head network to process these features…

计算机视觉与模式识别 · 计算机科学 2022-11-01 Nikolaos Gkalelis , Dimitrios Daskalakis , Vasileios Mezaris

Neuromorphic sensors, specifically event cameras, revolutionize visual data acquisition by capturing pixel intensity changes with exceptional dynamic range, minimal latency, and energy efficiency, setting them apart from conventional…

计算机视觉与模式识别 · 计算机科学 2024-07-16 Qi Wang , Zhou Xu , Yuming Lin , Jingtao Ye , Hongsheng Li , Guangming Zhu , Syed Afaq Ali Shah , Mohammed Bennamoun , Liang Zhang

Action recognition is so far mainly focusing on the problem of classification of hand selected preclipped actions and reaching impressive results in this field. But with the performance even ceiling on current datasets, it also appears that…

计算机视觉与模式识别 · 计算机科学 2019-06-05 Hilde Kuehne , Ahsan Iqbal , Alexander Richard , Juergen Gall

The increasing proliferation of video surveillance cameras and the escalating demand for crime prevention have intensified interest in the task of violence detection within the research community. Compared to other action recognition tasks,…

计算机视觉与模式识别 · 计算机科学 2024-08-06 Pietro Nardelli , Danilo Comminiello

Action recognition has received increasing attention from the computer vision and machine learning communities in the last decade. To enable the study of this problem, there exist a vast number of action datasets, which are recorded under…

计算机视觉与模式识别 · 计算机科学 2017-05-08 Wenhui Li , Yongkang Wong , An-An Liu , Yang Li , Yu-Ting Su , Mohan Kankanhalli

Weakly-supervised Temporal Action Localization (WS-TAL) methods learn to localize temporal starts and ends of action instances in a video under only video-level supervision. Existing WS-TAL methods rely on deep features learned for action…

计算机视觉与模式识别 · 计算机科学 2021-03-31 Ziyi Liu , Le Wang , Wei Tang , Junsong Yuan , Nanning Zheng , Gang Hua

This paper focuses on task recognition and action segmentation in weakly-labeled instructional videos, where only the ordered sequence of video-level actions is available during training. We propose a two-stream framework, which exploits…

计算机视觉与模式识别 · 计算机科学 2021-10-13 Reza Ghoddoosian , Saif Sayed , Vassilis Athitsos

Video predictive understanding encompasses a wide range of efforts that are concerned with the anticipation of the unobserved future from the current as well as historical video observations. Action prediction is a major sub-area of video…

计算机视觉与模式识别 · 计算机科学 2021-07-20 He Zhao , Richard P. Wildes

Action recognition is a vital task in computer vision, and many methods are developed to push it to the limit. However, current action recognition models have huge computational costs, which cannot be deployed to real-world tasks on mobile…

计算机视觉与模式识别 · 计算机科学 2019-06-18 Chen-Lin Zhang , Xin-Xin Liu , Jianxin Wu

Low-light videos often exhibit spatiotemporal incoherent noise, leading to poor visibility and compromised performance across various computer vision applications. One significant challenge in enhancing such content using modern…

计算机视觉与模式识别 · 计算机科学 2024-05-28 Nantheera Anantrasirichai , Ruirui Lin , Alexandra Malyugina , David Bull

Low-resolution face recognition (LRFR) has received increasing attention over the past few years. Its applications lie widely in the real-world environment when high-resolution or high-quality images are hard to capture. One of the biggest…

计算机视觉与模式识别 · 计算机科学 2019-04-01 Pei Li , Loreto Prieto , Domingo Mery , Patrick Flynn

Fine-grained action recognition is attracting increasing attention due to the emerging demand of specific action understanding in real-world applications, whereas the data of rare fine-grained categories is very limited. Therefore, we…

计算机视觉与模式识别 · 计算机科学 2021-08-17 Jiahao Wang , Yunhong Wang , Sheng Liu , Annan Li

Temporal action detection (TAD) aims to detect all action boundaries and their corresponding categories in an untrimmed video. The unclear boundaries of actions in videos often result in imprecise predictions of action boundaries by…

计算机视觉与模式识别 · 计算机科学 2023-09-12 Dingfeng Shi , Qiong Cao , Yujie Zhong , Shan An , Jian Cheng , Haogang Zhu , Dacheng Tao

We introduce a new task called Referring Atomic Video Action Recognition (RAVAR), aimed at identifying atomic actions of a particular person based on a textual description and the video data of this person. This task differs from…

计算机视觉与模式识别 · 计算机科学 2024-07-12 Kunyu Peng , Jia Fu , Kailun Yang , Di Wen , Yufan Chen , Ruiping Liu , Junwei Zheng , Jiaming Zhang , M. Saquib Sarfraz , Rainer Stiefelhagen , Alina Roitberg

Human action recognition in low-light environments is crucial for various real-world applications. However, the existing approaches overlook the full utilization of brightness information throughout the training phase, leading to suboptimal…

计算机视觉与模式识别 · 计算机科学 2025-04-01 Shihao Cheng , Jinlu Zhang , Yue Liu , Zhigang Tu

Action segmentation is the task of temporally segmenting every frame of an untrimmed video. Weakly supervised approaches to action segmentation, especially from transcripts have been of considerable interest to the computer vision…

计算机视觉与模式识别 · 计算机科学 2021-10-22 Yaser Souri , Alexander Richard , Luca Minciullo , Juergen Gall

With the widespread use of installed cameras, video-based monitoring approaches have seized considerable attention for different purposes like assisted living. Temporal redundancy and the sheer size of raw videos are the two most common…

计算机视觉与模式识别 · 计算机科学 2022-09-30 Ali Abdari , Pouria Amirjan , Azadeh Mansouri