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Action classification has made great progress, but segmenting and recognizing actions from long untrimmed videos remains a challenging problem. Most state-of-the-art methods focus on designing temporal convolution-based models, but the…

Computer Vision and Pattern Recognition · Computer Science 2022-11-23 Dazhao Du , Bing Su , Yu Li , Zhongang Qi , Lingyu Si , Ying Shan

In this paper we introduce a Transformer-based approach to video object segmentation (VOS). To address compounding error and scalability issues of prior work, we propose a scalable, end-to-end method for VOS called Sparse Spatiotemporal…

Computer Vision and Pattern Recognition · Computer Science 2021-03-30 Brendan Duke , Abdalla Ahmed , Christian Wolf , Parham Aarabi , Graham W. Taylor

Traffic flow forecasting is essential and challenging to intelligent city management and public safety. Recent studies have shown the potential of convolution-free Transformer approach to extract the dynamic dependencies among complex…

Physics and Society · Physics 2021-11-08 Xiao Yan , Xianghua Gan , Jingjing Tang , Rui Wang

Understanding temporal dynamics of video is an essential aspect of learning better video representations. Recently, transformer-based architectural designs have been extensively explored for video tasks due to their capability to capture…

Computer Vision and Pattern Recognition · Computer Science 2022-07-20 Sukmin Yun , Jaehyung Kim , Dongyoon Han , Hwanjun Song , Jung-Woo Ha , Jinwoo Shin

We propose a novel solution for the task of video panoptic segmentation, that simultaneously predicts pixel-level semantic and instance segmentation and generates clip-level instance tracks. Our network, named VPS-Transformer, with a hybrid…

Computer Vision and Pattern Recognition · Computer Science 2022-10-10 Andra Petrovai , Sergiu Nedevschi

In this paper, we propose a simple yet effective approach for self-supervised video object segmentation (VOS). Our key insight is that the inherent structural dependencies present in DINO-pretrained Transformers can be leveraged to…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Shuangrui Ding , Rui Qian , Haohang Xu , Dahua Lin , Hongkai Xiong

Multivariate time series classification is a crucial task in data mining, attracting growing research interest due to its broad applications. While many existing methods focus on discovering discriminative patterns in time series,…

Machine Learning · Computer Science 2024-12-24 Wenjie Xi , Rundong Zuo , Alejandro Alvarez , Jie Zhang , Byron Choi , Jessica Lin

We present a new architecture for end-to-end sequence learning of actions in video, we call VideoLSTM. Rather than adapting the video to the peculiarities of established recurrent or convolutional architectures, we adapt the architecture to…

Computer Vision and Pattern Recognition · Computer Science 2016-07-08 Zhenyang Li , Efstratios Gavves , Mihir Jain , Cees G. M. Snoek

In this paper, we propose self-supervised training for video transformers using unlabeled video data. From a given video, we create local and global spatiotemporal views with varying spatial sizes and frame rates. Our self-supervised…

Computer Vision and Pattern Recognition · Computer Science 2022-03-22 Kanchana Ranasinghe , Muzammal Naseer , Salman Khan , Fahad Shahbaz Khan , Michael Ryoo

Learning discriminative spatiotemporal representation is the key problem of video understanding. Recently, Vision Transformers (ViTs) have shown their power in learning long-term video dependency with self-attention. Unfortunately, they…

Computer Vision and Pattern Recognition · Computer Science 2022-11-18 Kunchang Li , Yali Wang , Yinan He , Yizhuo Li , Yi Wang , Limin Wang , Yu Qiao

Self-attention based Transformer models have demonstrated impressive results for image classification and object detection, and more recently for video understanding. Inspired by this success, we investigate the application of Transformer…

Computer Vision and Pattern Recognition · Computer Science 2022-08-30 Chenlin Zhang , Jianxin Wu , Yin Li

Attention mechanisms have become a popular component in deep neural networks, yet there has been little examination of how different influencing factors and methods for computing attention from these factors affect performance. Toward a…

Computer Vision and Pattern Recognition · Computer Science 2019-04-15 Xizhou Zhu , Dazhi Cheng , Zheng Zhang , Stephen Lin , Jifeng Dai

In this paper we discuss several forms of spatiotemporal convolutions for video analysis and study their effects on action recognition. Our motivation stems from the observation that 2D CNNs applied to individual frames of the video have…

Computer Vision and Pattern Recognition · Computer Science 2018-04-13 Du Tran , Heng Wang , Lorenzo Torresani , Jamie Ray , Yann LeCun , Manohar Paluri

Spatio-temporal representational learning has been widely adopted in various fields such as action recognition, video object segmentation, and action anticipation. Previous spatio-temporal representational learning approaches primarily…

Computer Vision and Pattern Recognition · Computer Science 2021-11-01 Xuefan Zha , Wentao Zhu , Tingxun Lv , Sen Yang , Ji Liu

Motion, as the uniqueness of a video, has been critical to the development of video understanding models. Modern deep learning models leverage motion by either executing spatio-temporal 3D convolutions, factorizing 3D convolutions into…

Computer Vision and Pattern Recognition · Computer Science 2022-06-15 Fuchen Long , Zhaofan Qiu , Yingwei Pan , Ting Yao , Jiebo Luo , Tao Mei

We propose LocFormer, a Transformer-based model for video grounding which operates at a constant memory footprint regardless of the video length, i.e. number of frames. LocFormer is designed for tasks where it is necessary to process the…

Computer Vision and Pattern Recognition · Computer Science 2021-12-21 Cristian Rodriguez-Opazo , Edison Marrese-Taylor , Basura Fernando , Hiroya Takamura , Qi Wu

We introduce Knowledge Fusion Transformers for video action classification. We present a self-attention based feature enhancer to fuse action knowledge in 3D inception based spatio-temporal context of the video clip intended to be…

Computer Vision and Pattern Recognition · Computer Science 2020-10-01 Ganesh Samarth , Sheetal Ojha , Nikhil Pareek

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…

Computer Vision and Pattern Recognition · Computer Science 2020-07-22 Simon Jenni , Givi Meishvili , Paolo Favaro

The vision community is witnessing a modeling shift from CNNs to Transformers, where pure Transformer architectures have attained top accuracy on the major video recognition benchmarks. These video models are all built on Transformer layers…

Computer Vision and Pattern Recognition · Computer Science 2021-06-25 Ze Liu , Jia Ning , Yue Cao , Yixuan Wei , Zheng Zhang , Stephen Lin , Han Hu

Currently successful methods for video description are based on encoder-decoder sentence generation using recur-rent neural networks (RNNs). Recent work has shown the advantage of integrating temporal and/or spatial attention mechanisms…

Computer Vision and Pattern Recognition · Computer Science 2017-03-13 Chiori Hori , Takaaki Hori , Teng-Yok Lee , Kazuhiro Sumi , John R. Hershey , Tim K. Marks