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In image deconvolution problems, the diagonalization of the underlying operators by means of the FFT usually yields very large speedups. When there are incomplete observations (e.g., in the case of unknown boundaries), standard…

Computer Vision and Pattern Recognition · Computer Science 2016-08-31 Miguel Simões , Luis B. Almeida , José Bioucas-Dias , Jocelyn Chanussot

Spatial convolution is arguably the most fundamental of 2D image processing operations. Conventional spatial image convolution can only be applied to a conventional image, that is, an array of pixel values (or similar image representation)…

Computer Vision and Pattern Recognition · Computer Science 2019-02-11 Cedric Scheerlinck , Nick Barnes , Robert Mahony

Temporal action localization is an important yet challenging problem. Given a long, untrimmed video consisting of multiple action instances and complex background contents, we need not only to recognize their action categories, but also to…

Computer Vision and Pattern Recognition · Computer Science 2017-06-14 Zheng Shou , Jonathan Chan , Alireza Zareian , Kazuyuki Miyazawa , Shih-Fu Chang

Unsupervised deep learning for optical flow computation has achieved promising results. Most existing deep-net based methods rely on image brightness consistency and local smoothness constraint to train the networks. Their performance…

Computer Vision and Pattern Recognition · Computer Science 2022-07-15 Yiran Zhong , Pan Ji , Jianyuan Wang , Yuchao Dai , Hongdong Li

Eliminating image blur produced by various kinds of motion has been a challenging problem. Dominant approaches rely heavily on model capacity to remove blurring by reconstructing residual from blurry observation in feature space. These…

Image and Video Processing · Electrical Eng. & Systems 2024-04-23 Chengxu Liu , Xuan Wang , Xiangyu Xu , Ruhao Tian , Shuai Li , Xueming Qian , Ming-Hsuan Yang

In this work, we first propose a fully differentiable Many-to-Many (M2M) splatting framework to interpolate frames efficiently. Given a frame pair, we estimate multiple bidirectional flows to directly forward warp the pixels to the desired…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Ping Hu , Simon Niklaus , Lu Zhang , Stan Sclaroff , Kate Saenko

Recent advances in video super-resolution have shown that convolutional neural networks combined with motion compensation are able to merge information from multiple low-resolution (LR) frames to generate high-quality images. Current…

Computer Vision and Pattern Recognition · Computer Science 2018-03-28 Mehdi S. M. Sajjadi , Raviteja Vemulapalli , Matthew Brown

We study the problem of segmenting moving objects in unconstrained videos. Given a video, the task is to segment all the objects that exhibit independent motion in at least one frame. We formulate this as a learning problem and design our…

Computer Vision and Pattern Recognition · Computer Science 2017-12-05 Pavel Tokmakov , Cordelia Schmid , Karteek Alahari

Video prediction is a pixel-wise dense prediction task to infer future frames based on past frames. Missing appearance details and motion blur are still two major problems for current predictive models, which lead to image distortion and…

Computer Vision and Pattern Recognition · Computer Science 2020-05-25 Beibei Jin , Yu Hu , Qiankun Tang , Jingyu Niu , Zhiping Shi , Yinhe Han , Xiaowei Li

Video compression aims to reconstruct seamless frames by encoding the motion and residual information from existing frames. Previous neural video compression methods necessitate distinct codecs for three types of frames (I-frame, P-frame…

Image and Video Processing · Electrical Eng. & Systems 2024-06-04 Meiqin Liu , Chenming Xu , Yukai Gu , Chao Yao , Yao Zhao

Semantic segmentation is a well-addressed topic in the computer vision literature, but the design of fast and accurate video processing networks remains challenging. In addition, to run on embedded hardware, computer vision models often…

Computer Vision and Pattern Recognition · Computer Science 2022-06-20 Evann Courdier , François Fleuret

Font generation is a challenging problem especially for some writing systems that consist of a large number of characters and has attracted a lot of attention in recent years. However, existing methods for font generation are often in…

Computer Vision and Pattern Recognition · Computer Science 2021-04-09 Yangchen Xie , Xinyuan Chen , Li Sun , Yue Lu

Large displacement optical flow is an integral part of many computer vision tasks. Variational optical flow techniques based on a coarse-to-fine scheme interpolate sparse matches and locally optimize an energy model conditioned on colour,…

Computer Vision and Pattern Recognition · Computer Science 2022-06-28 Qiao Chen , Charalambos Poullis

Video extrapolation in space and time (VEST) enables viewers to forecast a 3D scene into the future and view it from novel viewpoints. Recent methods propose to learn an entangled representation, aiming to model layered scene geometry,…

Computer Vision and Pattern Recognition · Computer Science 2024-08-05 Sudhir Yarram , Junsong Yuan

This paper presents a unified framework that allows high-quality dynamic Gaussian Splatting from both defocused and motion-blurred monocular videos. Due to the significant difference between the formation processes of defocus blur and…

Computer Vision and Pattern Recognition · Computer Science 2025-11-03 Xuankai Zhang , Junjin Xiao , Qing Zhang

Blind deconvolution problems are severely ill-posed because neither the underlying signal nor the forward operator are not known exactly. Conventionally, these problems are solved by alternating between estimation of the image and kernel…

Image and Video Processing · Electrical Eng. & Systems 2023-12-06 Yash Sanghvi , Yiheng Chi , Stanley H. Chan

Convolutional neural network inference on video input is computationally expensive and requires high memory bandwidth. Recently, DeltaCNN managed to reduce the cost by only processing pixels with significant updates over the previous frame.…

Computer Vision and Pattern Recognition · Computer Science 2023-08-16 Mathias Parger , Chengcheng Tang , Thomas Neff , Christopher D. Twigg , Cem Keskin , Robert Wang , Markus Steinberger

We address unsupervised optical flow estimation for ego-centric motion. We argue that optical flow can be cast as a geometrical warping between two successive video frames and devise a deep architecture to estimate such transformation in…

Computer Vision and Pattern Recognition · Computer Science 2017-10-31 Stefano Alletto , Davide Abati , Simone Calderara , Rita Cucchiara , Luca Rigazio

Dense video captioning aims to generate multiple associated captions with their temporal locations from the video. Previous methods follow a sophisticated "localize-then-describe" scheme, which heavily relies on numerous hand-crafted…

Computer Vision and Pattern Recognition · Computer Science 2021-11-18 Teng Wang , Ruimao Zhang , Zhichao Lu , Feng Zheng , Ran Cheng , Ping Luo

Handling complex or nonlinear motion patterns has long posed challenges for video frame interpolation. Although recent advances in diffusion-based methods offer improvements over traditional optical flow-based approaches, they still…

Computer Vision and Pattern Recognition · Computer Science 2025-05-13 Zihao Zhang , Haoran Chen , Haoyu Zhao , Guansong Lu , Yanwei Fu , Hang Xu , Zuxuan Wu