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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

Most self-supervised 6D object pose estimation methods can only work with additional depth information or rely on the accurate annotation of 2D segmentation masks, limiting their application range. In this paper, we propose a 6D object pose…

计算机视觉与模式识别 · 计算机科学 2023-08-22 Yang Hai , Rui Song , Jiaojiao Li , David Ferstl , Yinlin Hu

Optical flow estimation is a fundamental problem of computer vision and has many applications in the fields of robot learning and autonomous driving. This paper reveals novel geometric laws of optical flow based on the insight and detailed…

计算机视觉与模式识别 · 计算机科学 2021-07-09 Guangming Wang , Shuaiqi Ren , Hesheng Wang

It has been recently shown that a convolutional neural network can learn optical flow estimation with unsupervised learning. However, the performance of the unsupervised methods still has a relatively large gap compared to its supervised…

计算机视觉与模式识别 · 计算机科学 2018-04-05 Yang Wang , Yi Yang , Zhenheng Yang , Liang Zhao , Peng Wang , Wei Xu

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…

计算机视觉与模式识别 · 计算机科学 2023-10-10 Shuai Yuan , Carlo Tomasi

We address the problem of joint optical flow and camera motion estimation in rigid scenes by incorporating geometric constraints into an unsupervised deep learning framework. Unlike existing approaches which rely on brightness constancy and…

计算机视觉与模式识别 · 计算机科学 2020-02-28 Shihao Jiang , Dylan Campbell , Miaomiao Liu , Stephen Gould , Richard Hartley

In this work, we propose a method that combines unsupervised deep learning predictions for optical flow and monocular disparity with a model based optimization procedure for instantaneous camera pose. Given the flow and disparity…

计算机视觉与模式识别 · 计算机科学 2019-02-14 Alex Zihao Zhu , Wenxin Liu , Ziyun Wang , Vijay Kumar , Kostas Daniilidis

Imposing consistency through proxy tasks has been shown to enhance data-driven learning and enable self-supervision in various tasks. This paper introduces novel and effective consistency strategies for optical flow estimation, a problem…

计算机视觉与模式识别 · 计算机科学 2022-05-25 Jisoo Jeong , Jamie Menjay Lin , Fatih Porikli , Nojun Kwak

Imagining multiple consecutive frames given one single snapshot is challenging, since it is difficult to simultaneously predict diverse motions from a single image and faithfully generate novel frames without visual distortions. In this…

计算机视觉与模式识别 · 计算机科学 2019-03-05 Lu Sheng , Junting Pan , Jiaming Guo , Jing Shao , Xiaogang Wang , Chen Change Loy

This paper introduces a novel method for self-supervised video representation learning via feature prediction. In contrast to the previous methods that focus on future feature prediction, we argue that a supervisory signal arising from…

计算机视觉与模式识别 · 计算机科学 2020-11-13 Nadine Behrmann , Juergen Gall , Mehdi Noroozi

Unsupervised video object segmentation aims to detect the most salient object in a video without any external guidance regarding the object. Salient objects often exhibit distinctive movements compared to the background, and recent methods…

计算机视觉与模式识别 · 计算机科学 2025-04-28 Suhwan Cho , Minhyeok Lee , Jungho Lee , MyeongAh Cho , Seungwook Park , Jaeyeob Kim , Hyunsung Jang , Sangyoun Lee

Self-supervised learning of visual representations has been focusing on learning content features, which do not capture object motion or location, and focus on identifying and differentiating objects in images and videos. On the other hand,…

计算机视觉与模式识别 · 计算机科学 2023-07-25 Adrien Bardes , Jean Ponce , Yann LeCun

In dense foggy scenes, existing optical flow methods are erroneous. This is due to the degradation caused by dense fog particles that break the optical flow basic assumptions such as brightness and gradient constancy. To address the…

计算机视觉与模式识别 · 计算机科学 2020-04-07 Wending Yan , Aashish Sharma , Robby T. Tan

Scene flow represents the motion of points in the 3D space, which is the counterpart of the optical flow that represents the motion of pixels in the 2D image. However, it is difficult to obtain the ground truth of scene flow in the real…

计算机视觉与模式识别 · 计算机科学 2022-06-09 Guangming Wang , Xiaoyu Tian , Ruiqi Ding , Hesheng Wang

This paper proposes an end-to-end trainable network, SegFlow, for simultaneously predicting pixel-wise object segmentation and optical flow in videos. The proposed SegFlow has two branches where useful information of object segmentation and…

计算机视觉与模式识别 · 计算机科学 2017-09-21 Jingchun Cheng , Yi-Hsuan Tsai , Shengjin Wang , Ming-Hsuan Yang

Learning to predict future images from a video sequence involves the construction of an internal representation that models the image evolution accurately, and therefore, to some degree, its content and dynamics. This is why pixel-space…

机器学习 · 计算机科学 2016-03-01 Michael Mathieu , Camille Couprie , Yann LeCun

Most of current Convolution Neural Network (CNN) based methods for optical flow estimation focus on learning optical flow on synthetic datasets with groundtruth, which is not practical. In this paper, we propose an unsupervised optical flow…

计算机视觉与模式识别 · 计算机科学 2019-07-29 Shuosen Guan , Haoxin Li , Wei-Shi Zheng

In this work, we propose a novel framework for unsupervised learning for event cameras that learns motion information from only the event stream. In particular, we propose an input representation of the events in the form of a discretized…

计算机视觉与模式识别 · 计算机科学 2018-12-20 Alex Zihao Zhu , Liangzhe Yuan , Kenneth Chaney , Kostas Daniilidis

In this paper, we proposed an unsupervised learning method for estimating the optical flow between video frames, especially to solve the occlusion problem. Occlusion is caused by the movement of an object or the movement of the camera,…

计算机视觉与模式识别 · 计算机科学 2020-03-05 Jianfeng Li , Junqiao Zhao , Tiantian Feng , Chen Ye , Lu Xiong

Intelligent agent naturally learns from motion. Various self-supervised algorithms have leveraged motion cues to learn effective visual representations. The hurdle here is that motion is both ambiguous and complex, rendering previous works…

计算机视觉与模式识别 · 计算机科学 2019-04-26 Xiaohang Zhan , Xingang Pan , Ziwei Liu , Dahua Lin , Chen Change Loy