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Flow models are effective at progressively generating realistic images, but they generally struggle to capture long-range dependencies during the generation process as they compress all the information from previous time steps into a single…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Mude Hui , Rui-Jie Zhu , Songlin Yang , Yu Zhang , Zirui Wang , Yuyin Zhou , Jason Eshraghian , Cihang Xie

We propose OneFlow - a flow-based one-class classifier for anomaly (outlier) detection that finds a minimal volume bounding region. Contrary to density-based methods, OneFlow is constructed in such a way that its result typically does not…

Machine Learning · Computer Science 2021-09-24 Łukasz Maziarka , Marek Śmieja , Marcin Sendera , Łukasz Struski , Jacek Tabor , Przemysław Spurek

Significant attention has been attracted to deep learning-based depth estimates. Dynamic objects become the most hard problems in inter-frame-supervised depth estimates due to the uncertainty in adjacent frames. Thus, integrating optical…

Computer Vision and Pattern Recognition · Computer Science 2023-10-04 Zhengyang Lu , Ying Chen

Flow-based generation in high-dimensional spaces is difficult because velocity prediction requires modeling high-dimensional noise, even when data has strong low-rank structure. We present Asymmetric Flow Modeling (AsymFlow), a…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Hansheng Chen , Jan Ackermann , Minseo Kim , Gordon Wetzstein , Leonidas Guibas

Optical flow estimation can be formulated as an end-to-end supervised learning problem, which yields estimates with a superior accuracy-runtime tradeoff compared to alternative methodology. In this paper, we make such networks estimate…

Computer Vision and Pattern Recognition · Computer Science 2018-12-21 Eddy Ilg , Özgün Çiçek , Silvio Galesso , Aaron Klein , Osama Makansi , Frank Hutter , Thomas Brox

Optical flow, inspired by the mechanisms of biological visual systems, calculates spatial motion vectors within visual scenes that are necessary for enabling robotics to excel in complex and dynamic working environments. However, current…

We introduce a novel motion estimation method, MaskFlow, that is capable of estimating accurate motion fields, even in very challenging cases with small objects, large displacements and drastic appearance changes. In addition to lower-level…

Computer Vision and Pattern Recognition · Computer Science 2023-11-22 Aria Ahmadi , David R. Walton , Tim Atherton , Cagatay Dikici

Modeling and synthesizing image noise is an important aspect in many computer vision applications. The long-standing additive white Gaussian and heteroscedastic (signal-dependent) noise models widely used in the literature provide only a…

Computer Vision and Pattern Recognition · Computer Science 2019-08-23 Abdelrahman Abdelhamed , Marcus A. Brubaker , Michael S. Brown

We present a framework to use recently introduced Capsule Networks for solving the problem of Optical Flow, one of the fundamental computer vision tasks. Most of the existing state of the art deep architectures either uses a correlation…

Computer Vision and Pattern Recognition · Computer Science 2023-12-05 Rahul Chand , Rajat Arora , K Ram Prabhakar , R Venkatesh Babu

In the era of end-to-end deep learning, many advances in computer vision are driven by large amounts of labeled data. In the optical flow setting, however, obtaining dense per-pixel ground truth for real scenes is difficult and thus such…

Computer Vision and Pattern Recognition · Computer Science 2017-11-22 Simon Meister , Junhwa Hur , Stefan Roth

Flow-based methods have demonstrated promising results in addressing the ill-posed nature of super-resolution (SR) by learning the distribution of high-resolution (HR) images with the normalizing flow. However, these methods can only…

Computer Vision and Pattern Recognition · Computer Science 2023-07-14 Jie-En Yao , Li-Yuan Tsao , Yi-Chen Lo , Roy Tseng , Chia-Che Chang , Chun-Yi Lee

Motion is a dominant cue in automated driving systems. Optical flow is typically computed to detect moving objects and to estimate depth using triangulation. In this paper, our motivation is to leverage the existing dense optical flow to…

Computer Vision and Pattern Recognition · Computer Science 2019-01-23 Hazem Rashed , Senthil Yogamani , Ahmad El-Sallab , Pavel Krizek , Mohamed El-Helw

Deep learning approaches have achieved great success in addressing the problem of optical flow estimation. The keys to success lie in the use of cost volume and coarse-to-fine flow inference. However, the matching problem becomes ill-posed…

Computer Vision and Pattern Recognition · Computer Science 2020-07-21 Tak-Wai Hui , Chen Change Loy

The interpretation of ego motion and scene change is a fundamental task for mobile robots. Optical flow information can be employed to estimate motion in the surroundings. Recently, unsupervised optical flow estimation has become a research…

Computer Vision and Pattern Recognition · Computer Science 2020-11-05 Hengli Wang , Rui Fan , Ming Liu

We present an optical flow estimation approach that operates on the full four-dimensional cost volume. This direct approach shares the structural benefits of leading stereo matching pipelines, which are known to yield high accuracy. To this…

Computer Vision and Pattern Recognition · Computer Science 2017-04-26 Jia Xu , René Ranftl , Vladlen Koltun

In most of computer vision applications, motion blur is regarded as an undesirable artifact. However, it has been shown that motion blur in an image may have practical interests in fundamental computer vision problems. In this work, we…

Computer Vision and Pattern Recognition · Computer Science 2021-03-11 Dawit Mureja Argaw , Junsik Kim , Francois Rameau , Jae Won Cho , In So Kweon

Autonomous vehicles operate in highly dynamic environments necessitating an accurate assessment of which aspects of a scene are moving and where they are moving to. A popular approach to 3D motion estimation, termed scene flow, is to employ…

Computer Vision and Pattern Recognition · Computer Science 2021-10-27 Philipp Jund , Chris Sweeney , Nichola Abdo , Zhifeng Chen , Jonathon Shlens

In recent years, the LiDAR images, as a 2D compact representation of 3D LiDAR point clouds, are widely applied in various tasks, e.g., 3D semantic segmentation, LiDAR point cloud compression (PCC). Among these works, the optical flow…

Image and Video Processing · Electrical Eng. & Systems 2021-08-31 Xuezhou Guo , Xuhu Lin , Lili Zhao , Zezhi Zhu , Jianwen Chen

State-of-the-art scene flow algorithms pursue the conflicting targets of accuracy, run time, and robustness. With the successful concept of pixel-wise matching and sparse-to-dense interpolation, we push the limits of scene flow estimation.…

Computer Vision and Pattern Recognition · Computer Science 2019-10-30 René Schuster , Oliver Wasenmüller , Christian Unger , Georg Kuschk , Didier Stricker

We present DDFlow, a data distillation approach to learning optical flow estimation from unlabeled data. The approach distills reliable predictions from a teacher network, and uses these predictions as annotations to guide a student network…

Computer Vision and Pattern Recognition · Computer Science 2019-02-26 Pengpeng Liu , Irwin King , Michael R. Lyu , Jia Xu