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Sampling, grouping, and aggregation are three important components in the multi-scale analysis of point clouds. In this paper, we present a novel data-driven sampler learning strategy for point-wise analysis tasks. Unlike the widely used…

Computer Vision and Pattern Recognition · Computer Science 2022-05-06 Yiqun Lin , Lichang Chen , Haibin Huang , Chongyang Ma , Xiaoguang Han , Shuguang Cui

Spatial and temporal modeling is one of the most core aspects of few-shot action recognition. Most previous works mainly focus on long-term temporal relation modeling based on high-level spatial representations, without considering the…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Jiazheng Xing , Mengmeng Wang , Yong Liu , Boyu Mu

Most previous few-shot learning algorithms are based on meta-training with fake few-shot tasks as training samples, where large labeled base classes are required. The trained model is also limited by the type of tasks. In this paper we…

Computer Vision and Pattern Recognition · Computer Science 2020-08-25 Jianyi Li , Guizhong Liu

This paper proposes an adaptive compact attention model for few-shot video-to-video translation. Existing works in this domain only use features from pixel-wise attention without considering the correlations among multiple reference images,…

Computer Vision and Pattern Recognition · Computer Science 2020-12-01 Risheng Huang , Li Shen , Xuan Wang , Cheng Lin , Hao-Zhi Huang

Action chunking is a widely adopted approach in Learning from Demonstration (LfD). By modeling multi-step action chunks rather than single-step actions, action chunking significantly enhances modeling capabilities for human expert policies.…

Robotics · Computer Science 2025-11-07 Yueyang Weng , Xiaopeng Zhang , Yongjin Mu , Yingcong Zhu , Yanjie Li , Qi Liu

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…

Computer Vision and Pattern Recognition · Computer Science 2022-11-23 Yuheng Shi , Xinxiao Wu , Hanxi Lin

Multi-object tracking (MOT) in computer vision remains a significant challenge, requiring precise localization and continuous tracking of multiple objects in video sequences. The emergence of data sets that emphasize robust…

Computer Vision and Pattern Recognition · Computer Science 2024-07-16 Thuc Nguyen-Quang , Minh-Triet Tran

Generating video descriptions automatically is a challenging task that involves a complex interplay between spatio-temporal visual features and language models. Given that videos consist of spatial (frame-level) features and their temporal…

Computer Vision and Pattern Recognition · Computer Science 2020-01-20 Anoop Cherian , Jue Wang , Chiori Hori , Tim K. Marks

Despite the recent advances in video classification, progress in spatio-temporal action recognition has lagged behind. A major contributing factor has been the prohibitive cost of annotating videos frame-by-frame. In this paper, we present…

Computer Vision and Pattern Recognition · Computer Science 2020-07-22 Anurag Arnab , Chen Sun , Arsha Nagrani , Cordelia Schmid

There has been a remarkable progress in learning a model which could recognise novel classes with only a few labeled examples in the last few years. Few-shot learning (FSL) for action recognition is a challenging task of recognising novel…

Computer Vision and Pattern Recognition · Computer Science 2021-08-23 Neeraj Kumar , Siddhansh Narang

Few-shot learning aims to handle previously unseen tasks using only a small amount of new training data. In preparing (or meta-training) a few-shot learner, however, massive labeled data are necessary. In the real world, unfortunately,…

Machine Learning · Computer Science 2020-03-19 Jun Seo , Sung Whan Yoon , Jaekyun Moon

A major emerging challenge is how to protect people's privacy as cameras and computer vision are increasingly integrated into our daily lives, including in smart devices inside homes. A potential solution is to capture and record just the…

Computer Vision and Pattern Recognition · Computer Science 2018-01-15 Mingze Xu , Aidean Sharghi , Xin Chen , David J Crandall

In this paper, we look at the problem of cross-domain few-shot classification that aims to learn a classifier from previously unseen classes and domains with few labeled samples. Recent approaches broadly solve this problem by…

Computer Vision and Pattern Recognition · Computer Science 2022-05-05 Wei-Hong Li , Xialei Liu , Hakan Bilen

Self-supervised approaches for video have shown impressive results in video understanding tasks. However, unlike early works that leverage temporal self-supervision, current state-of-the-art methods primarily rely on tasks from the image…

Computer Vision and Pattern Recognition · Computer Science 2023-12-21 Ishan Rajendrakumar Dave , Simon Jenni , Mubarak Shah

We address the problem of video representation learning without human-annotated labels. While previous efforts address the problem by designing novel self-supervised tasks using video data, the learned features are merely on a…

Computer Vision and Pattern Recognition · Computer Science 2019-04-09 Jiangliu Wang , Jianbo Jiao , Linchao Bao , Shengfeng He , Yunhui Liu , Wei Liu

Episodic training is a mainstream training strategy for few-shot learning. In few-shot scenarios, however, this strategy is often inferior to some non-episodic training strategy, e. g., Neighbourhood Component Analysis (NCA), which…

Machine Learning · Computer Science 2024-02-02 Tao Zhang

We present a novel method for few-shot video classification, which performs appearance and temporal alignments. In particular, given a pair of query and support videos, we conduct appearance alignment via frame-level feature matching to…

Computer Vision and Pattern Recognition · Computer Science 2022-07-25 Khoi D. Nguyen , Quoc-Huy Tran , Khoi Nguyen , Binh-Son Hua , Rang Nguyen

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…

Computer Vision and Pattern Recognition · Computer Science 2021-03-31 Ziyi Liu , Le Wang , Wei Tang , Junsong Yuan , Nanning Zheng , Gang Hua

Localizing actions in video is a core task in computer vision. The weakly supervised temporal localization problem investigates whether this task can be adequately solved with only video-level labels, significantly reducing the amount of…

Computer Vision and Pattern Recognition · Computer Science 2021-05-07 Junwei Ma , Satya Krishna Gorti , Maksims Volkovs , Guangwei Yu

Video semantic segmentation has achieved great progress under the supervision of large amounts of labelled training data. However, domain adaptive video segmentation, which can mitigate data labelling constraints by adapting from a labelled…

Computer Vision and Pattern Recognition · Computer Science 2022-07-07 Yun Xing , Dayan Guan , Jiaxing Huang , Shijian Lu