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Learning self-supervised video representation predominantly focuses on discriminating instances generated from simple data augmentation schemes. However, the learned representation often fails to generalize over unseen camera viewpoints. To…

计算机视觉与模式识别 · 计算机科学 2021-12-08 Srijan Das , Michael S. Ryoo

We propose SCVRL, a novel contrastive-based framework for self-supervised learning for videos. Differently from previous contrast learning based methods that mostly focus on learning visual semantics (e.g., CVRL), SCVRL is capable of…

计算机视觉与模式识别 · 计算机科学 2022-05-25 Michael Dorkenwald , Fanyi Xiao , Biagio Brattoli , Joseph Tighe , Davide Modolo

Video-based person re-identification (Re-ID) aims to automatically retrieve video sequences of the same person under non-overlapping cameras. To achieve this goal, it is the key to fully utilize abundant spatial and temporal cues in videos.…

计算机视觉与模式识别 · 计算机科学 2021-04-02 Xuehu Liu , Pingping Zhang , Chenyang Yu , Huchuan Lu , Xiaoyun Yang

Sequential Recommendation (SR) has received increasing attention due to its ability to capture user dynamic preferences. Recently, Contrastive Learning (CL) provides an effective approach for sequential recommendation by learning invariance…

Video copy localization aims to precisely localize all the copied segments within a pair of untrimmed videos in video retrieval applications. Previous methods typically start from frame-to-frame similarity matrix generated by cosine…

计算机视觉与模式识别 · 计算机科学 2022-11-28 Sifeng He , Yue He , Minlong Lu , Chen Jiang , Xudong Yang , Feng Qian , Xiaobo Zhang , Lei Yang , Jiandong Zhang

Video Action Counting (VAC) is crucial in analyzing sports, fitness, and everyday activities by quantifying repetitive actions in videos. However, traditional VAC methods have overlooked the complexity of action repetitions, such as…

计算机视觉与模式识别 · 计算机科学 2024-03-21 Hang Wang , Zhi-Qi Cheng , Youtian Du , Lei Zhang

Self-supervised skeleton-based action recognition with contrastive learning has attracted much attention. Recent literature shows that data augmentation and large sets of contrastive pairs are crucial in learning such representations. In…

计算机视觉与模式识别 · 计算机科学 2022-07-08 Zhan Chen , Hong Liu , Tianyu Guo , Zhengyan Chen , Pinhao Song , Hao Tang

Despite the success of fully-supervised human skeleton sequence modeling, utilizing self-supervised pre-training for skeleton sequence representation learning has been an active field because acquiring task-specific skeleton annotations at…

计算机视觉与模式识别 · 计算机科学 2023-03-28 Yuxiao Chen , Long Zhao , Jianbo Yuan , Yu Tian , Zhaoyang Xia , Shijie Geng , Ligong Han , Dimitris N. Metaxas

We argue that time series analysis is fundamentally different in nature to either vision or natural language processing with respect to the forms of meaningful self-supervised learning tasks that can be defined. Motivated by this insight,…

机器学习 · 计算机科学 2023-12-13 Navid Mohammadi Foumani , Chang Wei Tan , Geoffrey I. Webb , Hamid Rezatofighi , Mahsa Salehi

Change detection (CD) is an important yet challenging task in the Earth observation field for monitoring Earth surface dynamics. The advent of deep learning techniques has recently propelled automatic CD into a technological revolution.…

计算机视觉与模式识别 · 计算机科学 2023-07-25 Haonan Guo , Bo Du , Chen Wu , Chengxi Han , Liangpei Zhang

Self-supervised learning has been widely used to obtain transferrable representations from unlabeled images. Especially, recent contrastive learning methods have shown impressive performances on downstream image classification tasks. While…

计算机视觉与模式识别 · 计算机科学 2021-04-29 Byungseok Roh , Wuhyun Shin , Ildoo Kim , Sungwoong Kim

Understanding visual reality involves acquiring common-sense knowledge about countless regularities in the visual world, e.g., how illumination alters the appearance of objects in a scene, and how motion changes their apparent spatial…

计算机视觉与模式识别 · 计算机科学 2016-10-03 Filip Piekniewski , Patryk Laurent , Csaba Petre , Micah Richert , Dimitry Fisher , Todd Hylton

While reinforcement learning (RL) is increasingly used for LLM-based tool learning, its efficiency is often hampered by an overabundance of simple samples that provide diminishing learning value as training progresses. Existing dynamic…

机器学习 · 计算机科学 2025-09-19 Zihao Feng , Xiaoxue Wang , Bowen Wu , Hailong Cao , Tiejun Zhao , Qun Yu , Baoxun Wang

We introduce a novel self-supervised learning approach to learn representations of videos that are responsive to changes in the motion dynamics. Our representations can be learned from data without human annotation and provide a substantial…

计算机视觉与模式识别 · 计算机科学 2020-07-22 Simon Jenni , Givi Meishvili , Paolo Favaro

Human attribute analysis is a challenging task in the field of computer vision, since the data is largely imbalance-distributed. Common techniques such as re-sampling and cost-sensitive learning require prior-knowledge to train the system.…

计算机视觉与模式识别 · 计算机科学 2019-08-16 Yiru Wang , Weihao Gan , Jie Yang , Wei Wu , Junjie Yan

The crux of self-supervised video representation learning is to build general features from unlabeled videos. However, most recent works have mainly focused on high-level semantics and neglected lower-level representations and their…

计算机视觉与模式识别 · 计算机科学 2021-08-18 Rui Qian , Yuxi Li , Huabin Liu , John See , Shuangrui Ding , Xian Liu , Dian Li , Weiyao Lin

Recently, self-supervised representation learning gives further development in multimedia technology. Most existing self-supervised learning methods are applicable to packaged data. However, when it comes to streamed data, they are…

计算机视觉与模式识别 · 计算机科学 2022-11-03 Zhiwei Lin , Yongtao Wang , Hongxiang Lin

In this paper we propose a novel machine-learning method for anomaly detection applicable to data with periodic characteristics where randomly varying period lengths are explicitly allowed. A multi-dimensional time series analysis is…

信号处理 · 电气工程与系统科学 2019-05-22 Lia Ahrens , Julian Ahrens , Hans D. Schotten

Self-supervised learning has driven significant progress in learning from single-subject, iconic images. However, there are still unanswered questions about the use of minimally-curated, naturalistic video data, which contain dense scenes…

计算机视觉与模式识别 · 计算机科学 2025-04-24 Alex N. Wang , Christopher Hoang , Yuwen Xiong , Yann LeCun , Mengye Ren

Learning a deep model from small data is yet an opening and challenging problem. We focus on one-shot classification by deep learning approach based on a small quantity of training samples. We proposed a novel deep learning approach named…

机器学习 · 计算机科学 2018-02-13 Chuanyun Xu , Yang Zhang , Xin Feng , YongXing Ge , Yihao Zhang , Jianwu Long