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This article deals with approximating steady-state particle-resolved fluid flow around a fixed particle of interest under the influence of randomly distributed stationary particles in a dispersed multiphase setup using Convolutional Neural…

流体动力学 · 物理学 2021-10-25 Bhargav Sriram Siddani , S. Balachandar , Ruogu Fang

The finding that very large networks can be trained efficiently and reliably has led to a paradigm shift in computer vision from engineered solutions to learning formulations. As a result, the research challenge shifts from devising…

计算机视觉与模式识别 · 计算机科学 2018-03-23 Nikolaus Mayer , Eddy Ilg , Philipp Fischer , Caner Hazirbas , Daniel Cremers , Alexey Dosovitskiy , Thomas Brox

Recent visual odometry (VO) methods incorporating geometric algorithm into deep-learning architecture have shown outstanding performance on the challenging monocular VO task. Despite encouraging results are shown, previous methods ignore…

计算机视觉与模式识别 · 计算机科学 2022-12-22 Yijun Cao , Xianshi Zhang , Fuya Luo , Peng Peng , Yongjie Li

In this paper, we propose a spatio-temporal contextual network, STC-Flow, for optical flow estimation. Unlike previous optical flow estimation approaches with local pyramid feature extraction and multi-level correlation, we propose a…

计算机视觉与模式识别 · 计算机科学 2020-11-04 Xiaolin Song , Yuyang Zhao , Jingyu Yang

This paper addresses the challenge of dense pixel correspondence estimation between two images. This problem is closely related to optical flow estimation task where ConvNets (CNNs) have recently achieved significant progress. While optical…

计算机视觉与模式识别 · 计算机科学 2018-10-23 Iaroslav Melekhov , Aleksei Tiulpin , Torsten Sattler , Marc Pollefeys , Esa Rahtu , Juho Kannala

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…

计算机视觉与模式识别 · 计算机科学 2017-11-22 Simon Meister , Junhwa Hur , Stefan Roth

A training pipeline for optical flow CNNs consists of a pretraining stage on a synthetic dataset followed by a fine tuning stage on a target dataset. However, obtaining ground truth flows from a target video requires a tremendous effort.…

计算机视觉与模式识别 · 计算机科学 2022-07-22 Woobin Im , Sebin Lee , Sung-Eui Yoon

Convolutional neural networks have been achieving the best possible accuracies in many visual pattern classification problems. However, due to the model capacity required to capture such representations, they are often oversensitive to…

计算机视觉与模式识别 · 计算机科学 2020-01-27 Yahia Assiri

Despite the success of Large-Vision Language Models (LVLMs), general optimization objectives (e.g., standard MLE) fail to constrain visual trajectories, leading to language bias and hallucination. To mitigate this, current methods introduce…

计算机视觉与模式识别 · 计算机科学 2026-05-05 Yangfu Li , Yuning Gong , Hongjian Zhan , Teng Li , Yuanhuiyi Lyu , Tianyi Chen , Qi Liu , Ziyuan Huang , Zhihang Zhong , Dandan Zheng , Yue Lu

In many applications, it is important to reconstruct a fluid flow field, or some other high-dimensional state, from limited measurements and limited data. In this work, we propose a shallow neural network-based learning methodology for such…

Despite the recent success of end-to-end learned representations, hand-crafted optical flow features are still widely used in video analysis tasks. To fill this gap, we propose TVNet, a novel end-to-end trainable neural network, to learn…

计算机视觉与模式识别 · 计算机科学 2018-04-03 Lijie Fan , Wenbing Huang , Chuang Gan , Stefano Ermon , Boqing Gong , Junzhou Huang

Computing optical flow is a fundamental problem in computer vision. However, deep learning-based optical flow techniques do not perform well for non-rigid movements such as those found in faces, primarily due to lack of the training data…

计算机视觉与模式识别 · 计算机科学 2021-05-05 Muhannad Alkaddour , Usman Tariq , Abhinav Dhall

Optical coherence tomography (OCT) helps ophthalmologists assess macular edema, accumulation of fluids, and lesions at microscopic resolution. Quantification of retinal fluids is necessary for OCT-guided treatment management, which relies…

图像与视频处理 · 电气工程与系统科学 2022-12-15 Reza Rasti , Armin Biglari , Mohammad Rezapourian , Ziyun Yang , Sina Farsiu

We focus on the word-level visual lipreading, which requires recognizing the word being spoken, given only the video but not the audio. State-of-the-art methods explore the use of end-to-end neural networks, including a shallow (up to three…

计算机视觉与模式识别 · 计算机科学 2019-07-22 Xinshuo Weng , Kris Kitani

Optical flow estimation with occlusion or large displacement is a problematic challenge due to the lost of corresponding pixels between consecutive frames. In this paper, we discover that the lost information is related to a large quantity…

计算机视觉与模式识别 · 计算机科学 2021-01-19 Yang Jiao , Guangming Shi , Trac D. Tran

We propose two new evaluation metrics to assess realness of generated images based on normalizing flows: a simpler and efficient flow-based likelihood distance (FLD) and a more exact dual-flow based likelihood distance (D-FLD). Because…

计算机视觉与模式识别 · 计算机科学 2024-10-08 Pranav Jeevan , Neeraj Nixon , Amit Sethi

Semi-supervised video object segmentation (VOS) aims to segment a few moving objects in a video sequence, where these objects are specified by annotation of first frame. The optical flow has been considered in many existing semi-supervised…

计算机视觉与模式识别 · 计算机科学 2021-11-23 Ziyang Liu , Jingmeng Liu , Weihai Chen , Xingming Wu , Zhengguo Li

The estimation of optical flow is an ambiguous task due to the lack of correspondence at occlusions, shadows, reflections, lack of texture and changes in illumination over time. Thus, unsupervised methods face major challenges as they need…

计算机视觉与模式识别 · 计算机科学 2021-04-07 Adrian Wälchli , Paolo Favaro

We propose a platform based on neural networks to solve the image-to-image translation problem in the context of squeeze flow of micro-droplets. In the first part of this paper, we present the governing partial differential equations to lay…

机器学习 · 计算机科学 2022-11-17 Aryan Mehboudi , Shrawan Singhal , S. V. Sreenivasan

While flow matching is elegant, its reliance on single-sample conditional velocities leads to high-variance training targets that destabilize optimization and slow convergence. By explicitly characterizing this variance, we identify 1) a…

计算机视觉与模式识别 · 计算机科学 2026-02-06 Donglin Yang , Yongxing Zhang , Xin Yu , Liang Hou , Xin Tao , Pengfei Wan , Xiaojuan Qi , Renjie Liao