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Computed Tomography (CT) imaging technique is widely used in geological exploration, medical diagnosis and other fields. In practice, however, the resolution of CT image is usually limited by scanning devices and great expense. Super…

计算机视觉与模式识别 · 计算机科学 2020-01-29 Yukai Wang , Qizhi Teng , Xiaohai He , Junxi Feng , Tingrong Zhang

3D convolution is powerful for video classification but often computationally expensive, recent studies mainly focus on decomposing it on spatial-temporal and/or channel dimensions. Unfortunately, most approaches fail to achieve a…

计算机视觉与模式识别 · 计算机科学 2021-06-04 Kunchang Li , Xianhang Li , Yali Wang , Jun Wang , Yu Qiao

Most existing 3D CNNs for video representation learning are clip-based methods, and thus do not consider video-level temporal evolution of spatio-temporal features. In this paper, we propose Video-level 4D Convolutional Neural Networks,…

计算机视觉与模式识别 · 计算机科学 2020-02-19 Shiwen Zhang , Sheng Guo , Weilin Huang , Matthew R. Scott , Limin Wang

Tasks that involve high-resolution dense prediction require a modeling of both local and global patterns in a large input field. Although the local and global structures often depend on each other and their simultaneous modeling is…

计算机视觉与模式识别 · 计算机科学 2021-06-10 Naoya Takahashi , Yuki Mitsufuji

We present a new data-driven video inpainting method for recovering missing regions of video frames. A novel deep learning architecture is proposed which contains two sub-networks: a temporal structure inference network and a spatial detail…

计算机视觉与模式识别 · 计算机科学 2018-12-04 Chuan Wang , Haibin Huang , Xiaoguang Han , Jue Wang

State-of-the-art methods for video action recognition commonly use an ensemble of two networks: the spatial stream, which takes RGB frames as input, and the temporal stream, which takes optical flow as input. In recent work, both of these…

计算机视觉与模式识别 · 计算机科学 2019-02-07 Jonathan C. Stroud , David A. Ross , Chen Sun , Jia Deng , Rahul Sukthankar

Effective extraction of temporal patterns is crucial for the recognition of temporally varying actions in video. We argue that the fixed-sized spatio-temporal convolution kernels used in convolutional neural networks (CNNs) can be improved…

计算机视觉与模式识别 · 计算机科学 2021-04-01 Alexandros Stergiou , Ronald Poppe

In this paper, we present a comprehensive study and propose several novel techniques for implementing 3D convolutional blocks using 2D and/or 1D convolutions with only 4D and/or 3D tensors. Our motivation is that 3D convolutions with 5D…

计算机视觉与模式识别 · 计算机科学 2024-07-24 Habib Hajimolahoseini , Walid Ahmed , Austin Wen , Yang Liu

Intelligent video summarization algorithms allow to quickly convey the most relevant information in videos through the identification of the most essential and explanatory content while removing redundant video frames. In this paper, we…

计算机视觉与模式识别 · 计算机科学 2022-02-16 Tianrui Liu , Qingjie Meng , Jun-Jie Huang , Athanasios Vlontzos , Daniel Rueckert , Bernhard Kainz

Convolutional Neural Networks with 3D kernels (3D-CNNs) currently achieve state-of-the-art results in video recognition tasks due to their supremacy in extracting spatiotemporal features within video frames. There have been many successful…

计算机视觉与模式识别 · 计算机科学 2021-10-19 Okan Köpüklü , Stefan Hörmann , Fabian Herzog , Hakan Cevikalp , Gerhard Rigoll

Deep neural networks have achieved remarkable success for video-based action recognition. However, most of existing approaches cannot be deployed in practice due to the high computational cost. To address this challenge, we propose a new…

计算机视觉与模式识别 · 计算机科学 2020-06-18 Kun Liu , Wu Liu , Huadong Ma , Mingkui Tan , Chuang Gan

The success of deep neural networks generally requires a vast amount of training data to be labeled, which is expensive and unfeasible in scale, especially for video collections. To alleviate this problem, in this paper, we propose…

计算机视觉与模式识别 · 计算机科学 2019-04-05 Longlong Jing , Xiaodong Yang , Jingen Liu , Yingli Tian

The abundance of gaps in satellite image time series often complicates the application of deep learning models such as convolutional neural networks for spatiotemporal modeling. Based on previous work in computer vision on image inpainting,…

机器学习 · 计算机科学 2022-08-19 Marius Appel

In many applications, including surveillance, entertainment, and restoration, there is a need to increase both the spatial resolution and the frame rate of a video sequence. The aim is to improve visual quality, refine details, and create a…

图像与视频处理 · 电气工程与系统科学 2024-07-25 Congrui Fu , Hui Yuan , Liquan Shen , Raouf Hamzaoui , Hao Zhang

We consider the problem of space-time super-resolution (ST-SR): increasing spatial resolution of video frames and simultaneously interpolating frames to increase the frame rate. Modern approaches handle these axes one at a time. In…

计算机视觉与模式识别 · 计算机科学 2020-03-31 Muhammad Haris , Greg Shakhnarovich , Norimichi Ukita

Video restoration, which aims to restore clear frames from degraded videos, has numerous important applications. The key to video restoration depends on utilizing inter-frame information. However, existing deep learning methods often rely…

图像与视频处理 · 电气工程与系统科学 2023-05-23 Dasong Li , Xiaoyu Shi , Yi Zhang , Ka Chun Cheung , Simon See , Xiaogang Wang , Hongwei Qin , Hongsheng Li

Temporal convolution has been widely used for video classification. However, it is performed on spatio-temporal contexts in a limited view, which often weakens its capacity of learning video representation. To alleviate this problem, we…

计算机视觉与模式识别 · 计算机科学 2020-06-26 Xianhang Li , Yali Wang , Zhipeng Zhou , Yu Qiao

This paper proposes a novel pretext task to address the self-supervised video representation learning problem. Specifically, given an unlabeled video clip, we compute a series of spatio-temporal statistical summaries, such as the spatial…

计算机视觉与模式识别 · 计算机科学 2021-02-01 Jiangliu Wang , Jianbo Jiao , Linchao Bao , Shengfeng He , Wei Liu , Yun-hui Liu

We address the problem of spatio-temporal action detection in videos. Existing methods commonly either ignore temporal context in action recognition and localization, or lack the modelling of flexible shapes of action tubes. In this paper,…

计算机视觉与模式识别 · 计算机科学 2019-07-04 Wei Li , Zehuan Yuan , Dashan Guo , Lei Huang , Xiangzhong Fang , Changhu Wang

Video deblurring is still an unsolved problem due to the challenging spatio-temporal modeling process. While existing convolutional neural network-based methods show a limited capacity for effective spatial and temporal modeling for video…

计算机视觉与模式识别 · 计算机科学 2022-04-19 Mingdeng Cao , Yanbo Fan , Yong Zhang , Jue Wang , Yujiu Yang