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Four classic criteria used to the classification of complex flows are discussed here. These criteria are useful to identify regions of the flow related to shear, elongation or rigid-body motion. These usual criteria, namely $Q$, $\Delta$,…

流体动力学 · 物理学 2016-02-17 Ramon S. Martins , Anselmo S. Pereira , Gilmar Mompean , Laurent Thais , Roney L. Thompson

Separation of enantiomers by flows is a promising chiral resolution method using cost-effective microfluidics. Notwithstanding a number of experimental and numerical studies, a fundamental understanding still remains elusive, and an…

软凝聚态物质 · 物理学 2016-11-11 Sunghan Ro , Juyeon Yi , Yong Woon Kim

Manipulation has long been a challenging task for robots, while humans can effortlessly perform complex interactions with objects, such as hanging a cup on the mug rack. A key reason is the lack of a large and uniform dataset for teaching…

机器人学 · 计算机科学 2025-06-09 Hongyan Zhi , Peihao Chen , Siyuan Zhou , Yubo Dong , Quanxi Wu , Lei Han , Mingkui Tan

Event cameras respond to scene dynamics and offer advantages to estimate motion. Following recent image-based deep-learning achievements, optical flow estimation methods for event cameras have rushed to combine those image-based methods…

计算机视觉与模式识别 · 计算机科学 2024-03-05 Shintaro Shiba , Yoshimitsu Aoki , Guillermo Gallego

Depth map estimation is a crucial task in computer vision, and new approaches have recently emerged taking advantage of light fields, as this new imaging modality captures much more information about the angular direction of light rays…

计算机视觉与模式识别 · 计算机科学 2020-08-12 Yang Chen , Martin Alain , Aljosa Smolic

Optical flow estimation is a widely known problem in computer vision introduced by Gibson, J.J(1950) to describe the visual perception of human by stimulus objects. Estimation of optical flow model can be achieved by solving for the motion…

计算机视觉与模式识别 · 计算机科学 2016-05-03 Noranart Vesdapunt , Utkarsh Sinha

Recent work in unsupervised multi-object segmentation shows impressive results by predicting motion from a single image despite the inherent ambiguity in predicting motion without the next image. On the other hand, the set of possible…

计算机视觉与模式识别 · 计算机科学 2023-07-18 Sadra Safadoust , Fatma Güney

This work introduces the framed curvature flow, a generalization of both the curve shortening flow and the vortex filament equation. Here, the magnitude of the velocity vector is still determined by the curvature, but its direction is given…

微分几何 · 数学 2024-09-02 Jiří Minarčík , Michal Beneš

Recent work has shown that optical flow estimation can be formulated as a supervised learning task and can be successfully solved with convolutional networks. Training of the so-called FlowNet was enabled by a large synthetically generated…

计算机视觉与模式识别 · 计算机科学 2018-01-18 Nikolaus Mayer , Eddy Ilg , Philip Häusser , Philipp Fischer , Daniel Cremers , Alexey Dosovitskiy , Thomas Brox

Optical flow estimation has made great progress, but usually suffers from degradation under adverse weather. Although semi/full-supervised methods have made good attempts, the domain shift between the synthetic and real adverse weather…

计算机视觉与模式识别 · 计算机科学 2023-03-27 Hanyu Zhou , Yi Chang , Gang Chen , Luxin Yan

Flows in networks (or graphs) play a significant role in numerous computer vision tasks. The scalar-valued edges in these graphs often lead to a loss of information and thereby to limitations in terms of expressiveness. For example,…

计算机视觉与模式识别 · 计算机科学 2023-05-16 Viktoria Ehm , Daniel Cremers , Florian Bernard

We study basic properties of flow equivalence on one-dimensional compact metric spaces with a particular emphasis on isotopy in the group of (self-) flow equivalences on such a space. In particular, we show that an orbit-preserving such map…

动力系统 · 数学 2017-09-13 Mike Boyle , Toke Meier Carlsen , Søren Eilers

Accurate fall detection for the assistance of older people is crucial to reduce incidents of deaths or injuries due to falls. Meanwhile, a vision-based fall detection system has shown some significant results to detect falls. Still,…

计算机视觉与模式识别 · 计算机科学 2021-04-14 Sagar Chhetri , Abeer Alsadoon , Thair Al Dala in , P. W. C. Prasad , Tarik A. Rashid , Angelika Maag

Optical flow estimation is a classical yet challenging task in computer vision. One of the essential factors in accurately predicting optical flow is to alleviate occlusions between frames. However, it is still a thorny problem for current…

计算机视觉与模式识别 · 计算机科学 2022-11-29 Shangkun Sun , Yuanqi Chen , Yu Zhu , Guodong Guo , Ge Li

In this paper we present a new method for deformable NeRF that can directly use optical flow as supervision. We overcome the major challenge with respect to the computationally inefficiency of enforcing the flow constraints to the backward…

计算机视觉与模式识别 · 计算机科学 2023-03-30 Chaoyang Wang , Lachlan Ewen MacDonald , Laszlo A. Jeni , Simon Lucey

Optical flow, which expresses pixel displacement, is widely used in many computer vision tasks to provide pixel-level motion information. However, with the remarkable progress of the convolutional neural network, recent state-of-the-art…

计算机视觉与模式识别 · 计算机科学 2021-11-11 Ruibing Jin , Guosheng Lin , Changyun Wen , Jianliang Wang , Fayao Liu

We present another explanation for the moon illusion, the phenomenon in which the moon looks larger near the horizon than near the zenith. In our model of the moon illusion, the sky is considered a spatially-contiguous and…

计算机视觉与模式识别 · 计算机科学 2016-09-29 Joseph Antonides , Toshiro Kubota

To humans, a robin seems more like a bird than a bird seems like a robin, but does this asymmetry also hold for machine vision? Humans and modern vision models can match each other in accuracy while making systematically different kinds of…

计算机视觉与模式识别 · 计算机科学 2026-05-15 Leyla Roksan Caglar , Pedro A. M. Mediano , Baihan Lin

We harness the momentum of light resonating inside a micro-droplet cavity, to experimentally generate micro-flows within the envelope of the drop. We 3D map these optically induced flows by using fluorescent nanoparticles; which reveals…

光学 · 物理学 2016-09-16 Daniel Bar-David , Shai Maayani , Leoplodo L. Martin , Tal Carmon

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,…

计算机视觉与模式识别 · 计算机科学 2022-06-28 Qiao Chen , Charalambos Poullis