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Accurate velocity estimation of surrounding moving objects and their trajectories are critical elements of perception systems in Automated/Autonomous Vehicles (AVs) with a direct impact on their safety. These are non-trivial problems due to…

Robotics · Computer Science 2024-03-27 MReza Alipour Sormoli , Mehrdad Dianati , Sajjad Mozaffari , Roger woodman

Over four decades, the majority addresses the problem of optical flow estimation using variational methods. With the advance of machine learning, some recent works have attempted to address the problem using convolutional neural network…

Computer Vision and Pattern Recognition · Computer Science 2020-03-17 Tak-Wai Hui , Xiaoou Tang , Chen Change Loy

Optical flow and disparity are two informative visual features for autonomous driving perception. They have been used for a variety of applications, such as obstacle and lane detection. The concept of "U-V-Disparity" has been widely…

Robotics · Computer Science 2023-08-04 Yi Feng , Ruge Zhang , Jiayuan Du , Qijun Chen , Rui Fan

In this technical report we investigate speed estimation of the ego-vehicle on the KITTI benchmark using state-of-the-art deep neural network based optical flow and single-view depth prediction methods. Using a straightforward intuitive…

Computer Vision and Pattern Recognition · Computer Science 2019-07-17 Róbert-Adrian Rill

Both optical flow and stereo disparities are image matches and can therefore benefit from joint training. Depth and 3D motion provide geometric rather than photometric information and can further improve optical flow. Accordingly, we design…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Shuai Yuan , Carlo Tomasi

3D single object tracking (SOT) is a crucial task in fields of mobile robotics and autonomous driving. Traditional motion-based approaches achieve target tracking by estimating the relative movement of target between two consecutive frames.…

Computer Vision and Pattern Recognition · Computer Science 2024-07-03 Shuo Li , Yubo Cui , Zhiheng Li , Zheng Fang

To date, top-performing optical flow estimation methods only take pairs of consecutive frames into account. While elegant and appealing, the idea of using more than two frames has not yet produced state-of-the-art results. We present a…

Computer Vision and Pattern Recognition · Computer Science 2018-11-30 Zhile Ren , Orazio Gallo , Deqing Sun , Ming-Hsuan Yang , Erik B. Sudderth , Jan Kautz

To apply optical flow in practice, it is often necessary to resize the input to smaller dimensions in order to reduce computational costs. However, downsizing inputs makes the estimation more challenging because objects and motion ranges…

Computer Vision and Pattern Recognition · Computer Science 2023-03-30 Hyunyoung Jung , Zhuo Hui , Lei Luo , Haitao Yang , Feng Liu , Sungjoo Yoo , Rakesh Ranjan , Denis Demandolx

Optical flow is a classical task that is important to the vision community. Classical optical flow estimation uses two frames as input, whilst some recent methods consider multiple frames to explicitly model long-range information. The…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Qiaole Dong , Yanwei Fu

Robust and accurate six degree-of-freedom tracking on portable devices remains a challenging problem, especially on small hand-held devices such as smartphones. For improved robustness and accuracy, complementary movement information from…

Computer Vision and Pattern Recognition · Computer Science 2020-06-25 Lassi Meronen , William J. Wilkinson , Arno Solin

Two optical flow estimation problems are addressed: i) occlusion estimation and handling, and ii) estimation from image sequences longer than two frames. The proposed ContinualFlow method estimates occlusions before flow, avoiding the use…

Computer Vision and Pattern Recognition · Computer Science 2018-11-06 Michal Neoral , Jan Šochman , Jiří Matas

Unsupervised video object segmentation (VOS), also known as video salient object detection, aims to detect the most prominent object in a video at the pixel level. Recently, two-stream approaches that leverage both RGB images and optical…

Computer Vision and Pattern Recognition · Computer Science 2024-07-17 Suhwan Cho , Minhyeok Lee , Jungho Lee , Donghyeong Kim , Seunghoon Lee , Sungmin Woo , Sangyoun Lee

Flow-based Generative Models (FGMs) effectively transform noise into complex data distributions. Incorporating Optimal Transport (OT) to couple noise and data during FGM training has been shown to improve the straightness of flow…

Machine Learning · Computer Science 2025-10-20 Lingkai Kong , Molei Tao , Yang Liu , Bryan Wang , Jinmiao Fu , Chien-Chih Wang , Huidong Liu

Recent work has shown that convolutional neural networks (CNNs) can be used to estimate optical flow with high quality and fast runtime. This makes them preferable for real-world applications. However, such networks require very large…

Computer Vision and Pattern Recognition · Computer Science 2018-08-21 Osama Makansi , Eddy Ilg , Thomas Brox

Scene flow estimation, which extracts point-wise motion between scenes, is becoming a crucial task in many computer vision tasks. However, all of the existing estimation methods utilize only the unidirectional features, restricting the…

Computer Vision and Pattern Recognition · Computer Science 2022-07-18 Wencan Cheng , Jong Hwan Ko

Optical Flow (OF) is the movement pattern of pixels or edges that is caused in a visual scene by the relative motion between an agent and a scene. OF is used in a wide range of computer vision algorithms and robotics applications. While the…

Image and Video Processing · Electrical Eng. & Systems 2023-09-25 Jonas Kühne , Michele Magno , Luca Benini

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…

Computer Vision and Pattern Recognition · Computer Science 2021-11-23 Ziyang Liu , Jingmeng Liu , Weihai Chen , Xingming Wu , Zhengguo Li

Pedestrian action recognition and intention prediction is one of the core issues in the field of autonomous driving. In this research field, action recognition is one of the key technologies. A large number of scholars have done a lot of…

Computer Vision and Pattern Recognition · Computer Science 2020-04-24 Dong Cao , Lisha Xu

We learn to compute optical flow by combining a classical spatial-pyramid formulation with deep learning. This estimates large motions in a coarse-to-fine approach by warping one image of a pair at each pyramid level by the current flow…

Computer Vision and Pattern Recognition · Computer Science 2016-11-22 Anurag Ranjan , Michael J. Black

Optical flow is an indispensable building block for various important computer vision tasks, including motion estimation, object tracking, and disparity measurement. In this work, we propose TransFlow, a pure transformer architecture for…

Computer Vision and Pattern Recognition · Computer Science 2023-04-25 Yawen Lu , Qifan Wang , Siqi Ma , Tong Geng , Yingjie Victor Chen , Huaijin Chen , Dongfang Liu