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We present a self-supervised Contrastive Video Representation Learning (CVRL) method to learn spatiotemporal visual representations from unlabeled videos. Our representations are learned using a contrastive loss, where two augmented clips…

计算机视觉与模式识别 · 计算机科学 2021-04-07 Rui Qian , Tianjian Meng , Boqing Gong , Ming-Hsuan Yang , Huisheng Wang , Serge Belongie , Yin Cui

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

Temporal cues in videos provide important information for recognizing actions accurately. However, temporal-discriminative features can hardly be extracted without using an annotated large-scale video action dataset for training. This paper…

计算机视觉与模式识别 · 计算机科学 2020-08-06 Jinpeng Wang , Yiqi Lin , Andy J. Ma , Pong C. Yuen

Contrastive learning has become one of the most impressive approaches for multi-modal representation learning. However, previous multi-modal works mainly focused on cross-modal understanding, ignoring in-modal contrastive learning, which…

机器学习 · 计算机科学 2024-09-17 Zhiyu Zhang , Da Liu , Shengqiang Liu , Anna Wang , Jie Gao , Yali Li

True understanding of videos comes from a joint analysis of all its modalities: the video frames, the audio track, and any accompanying text such as closed captions. We present a way to learn a compact multimodal feature representation that…

计算机视觉与模式识别 · 计算机科学 2020-04-07 Vivek Sharma , Makarand Tapaswi , Rainer Stiefelhagen

With the advent of large-scale multimodal video datasets, especially sequences with audio or transcribed speech, there has been a growing interest in self-supervised learning of video representations. Most prior work formulates the…

计算机视觉与模式识别 · 计算机科学 2020-09-21 Bruno Korbar , Fabio Petroni , Rohit Girdhar , Lorenzo Torresani

Improving sample efficiency is a key research problem in reinforcement learning (RL), and CURL, which uses contrastive learning to extract high-level features from raw pixels of individual video frames, is an efficient…

机器学习 · 计算机科学 2020-10-16 Jinhua Zhu , Yingce Xia , Lijun Wu , Jiajun Deng , Wengang Zhou , Tao Qin , Houqiang Li

Recent works have advanced the performance of self-supervised representation learning by a large margin. The core among these methods is intra-image invariance learning. Two different transformations of one image instance are considered as…

计算机视觉与模式识别 · 计算机科学 2021-05-14 Haiping Wu , Xiaolong Wang

How to efficiently utilize the temporal features is crucial, yet challenging, for video restoration. The temporal features usually contain various noisy and uncorrelated information, and they may interfere with the restoration of the…

计算机视觉与模式识别 · 计算机科学 2022-04-12 Cong Huang , Jiahao Li , Bin Li , Dong Liu , Yan Lu

We use multilayer Long Short Term Memory (LSTM) networks to learn representations of video sequences. Our model uses an encoder LSTM to map an input sequence into a fixed length representation. This representation is decoded using single or…

机器学习 · 计算机科学 2016-01-05 Nitish Srivastava , Elman Mansimov , Ruslan Salakhutdinov

Recent breakthroughs in self-supervised learning show that such algorithms learn visual representations that can be transferred better to unseen tasks than joint-training methods relying on task-specific supervision. In this paper, we found…

机器学习 · 计算机科学 2021-06-29 Hyuntak Cha , Jaeho Lee , Jinwoo Shin

The past decade has witnessed notable achievements in self-supervised learning for video tasks. Recent efforts typically adopt the Masked Video Modeling (MVM) paradigm, leading to significant progress on multiple video tasks. However, two…

计算机视觉与模式识别 · 计算机科学 2025-03-20 Yang Liu , Qianqian Xu , Peisong Wen , Siran Dai , Qingming Huang

Learning representations from videos requires understanding continuous motion and visual correspondences between frames. In this paper, we introduce the Concatenated Masked Autoencoders (CatMAE) as a spatial-temporal learner for…

计算机视觉与模式识别 · 计算机科学 2023-12-15 Zhouqiang Jiang , Bowen Wang , Tong Xiang , Zhaofeng Niu , Hong Tang , Guangshun Li , Liangzhi Li

Discriminative representation is crucial for the association step in multi-object tracking. Recent work mainly utilizes features in single or neighboring frames for constructing metric loss and empowering networks to extract representation…

计算机视觉与模式识别 · 计算机科学 2022-04-06 En Yu , Zhuoling Li , Shoudong Han

To generate accurate videos, algorithms have to understand the spatial and temporal dependencies in the world. Current algorithms enable accurate predictions over short horizons but tend to suffer from temporal inconsistencies. When…

计算机视觉与模式识别 · 计算机科学 2023-06-02 Wilson Yan , Danijar Hafner , Stephen James , Pieter Abbeel

Previous work on action representation learning focused on global representations for short video clips. In contrast, many practical applications, such as video alignment, strongly demand learning the intensive representation of long…

计算机视觉与模式识别 · 计算机科学 2023-03-03 Minghao Chen , Renbo Tu , Chenxi Huang , Yuqi Lin , Boxi Wu , Deng Cai

The lack of labeled data is a key challenge for learning useful representation from time series data. However, an unsupervised representation framework that is capable of producing high quality representations could be of great value. It is…

We propose a self-supervised approach for learning representations and robotic behaviors entirely from unlabeled videos recorded from multiple viewpoints, and study how this representation can be used in two robotic imitation settings:…

计算机视觉与模式识别 · 计算机科学 2018-03-21 Pierre Sermanet , Corey Lynch , Yevgen Chebotar , Jasmine Hsu , Eric Jang , Stefan Schaal , Sergey Levine

This paper provides a review on representation learning for videos. We classify recent spatiotemporal feature learning methods for sequential visual data and compare their pros and cons for general video analysis. Building effective…

计算机视觉与模式识别 · 计算机科学 2024-05-13 Elham Ravanbakhsh , Yongqing Liang , J. Ramanujam , Xin Li

We present a large-scale study on unsupervised spatiotemporal representation learning from videos. With a unified perspective on four recent image-based frameworks, we study a simple objective that can easily generalize all these methods to…

计算机视觉与模式识别 · 计算机科学 2021-04-30 Christoph Feichtenhofer , Haoqi Fan , Bo Xiong , Ross Girshick , Kaiming He