Search Results for author: Junfeng Wu

Found 18 papers, 7 papers with code

Consistent and Asymptotically Statistically-Efficient Solution to Camera Motion Estimation

1 code implementation2 Mar 2024 Guangyang Zeng, Qingcheng Zeng, Xinghan Li, Biqiang Mu, Jiming Chen, Ling Shi, Junfeng Wu

Given 2D point correspondences between an image pair, inferring the camera motion is a fundamental issue in the computer vision community.

Motion Estimation

Errors Dynamics in Affine Group Systems

no code implementations31 Jul 2023 Xinghan Li, Jianqi Chen, Han Zhang, Jieqiang Wei, Junfeng Wu

In this paper, we focus on the error dynamics analysis for an affine group system under external disturbances or random noises.

InstMove: Instance Motion for Object-centric Video Segmentation

1 code implementation CVPR 2023 Qihao Liu, Junfeng Wu, Yi Jiang, Xiang Bai, Alan Yuille, Song Bai

A common solution is to use optical flow to provide motion information, but essentially it only considers pixel-level motion, which still relies on appearance similarity and hence is often inaccurate under occlusion and fast movement.

Object Optical Flow Estimation +3

Consistent and Asymptotically Efficient Localization from Range-Difference Measurements

no code implementations7 Feb 2023 Guangyang Zeng, Biqiang Mu, Ling Shi, Jiming Chen, Junfeng Wu

Based on the preliminary consistent location estimate, a one-step GN iteration suffices to achieve the same asymptotic property as the ML estimator.

The Runner-up Solution for YouTube-VIS Long Video Challenge 2022

no code implementations18 Nov 2022 Junfeng Wu, Yi Jiang, Qihao Liu, Xiang Bai, Song Bai

This technical report describes our 2nd-place solution for the ECCV 2022 YouTube-VIS Long Video Challenge.

Contrastive Learning Instance Segmentation +2

On Embeddings and Inverse Embeddings of Input Design for Regularized System Identification

no code implementations27 Sep 2022 Biqiang Mu, Tianshi Chen, He Kong, Bo Jiang, Lei Wang, Junfeng Wu

For the emerging regularized system identification, the study on input design has just started, and it is often formulated as a non-convex optimization problem that minimizes a scalar measure of the Bayesian mean squared error matrix subject to certain constraints, and the state-of-art method is the so-called quadratic mapping and inverse embedding (QMIE) method, where a time domain inverse embedding (TDIE) is proposed to find the inverse of the quadratic mapping.

CPnP: Consistent Pose Estimator for Perspective-n-Point Problem with Bias Elimination

1 code implementation13 Sep 2022 Guangyang Zeng, ShiYu Chen, Biqiang Mu, Guodong Shi, Junfeng Wu

The Perspective-n-Point (PnP) problem has been widely studied in both computer vision and photogrammetry societies.

Graph Distance Neural Networks for Predicting Multiple Drug Interactions

no code implementations30 Aug 2022 Haifan zhou, Wenjing Zhou, Junfeng Wu

Based on our assumption, we convert the prediction of DDI to link prediction problem, utilizing known drug node characteristics and DDI types to predict unknown DDI types.

Link Prediction

In Defense of Online Models for Video Instance Segmentation

1 code implementation21 Jul 2022 Junfeng Wu, Qihao Liu, Yi Jiang, Song Bai, Alan Yuille, Xiang Bai

In recent years, video instance segmentation (VIS) has been largely advanced by offline models, while online models gradually attracted less attention possibly due to their inferior performance.

Ranked #9 on Video Instance Segmentation on YouTube-VIS validation (using extra training data)

Contrastive Learning Instance Segmentation +5

Global and Asymptotically Efficient Localization from Range Measurements

no code implementations31 Mar 2022 Guangyang Zeng, Biqiang Mu, Jiming Chen, Zhiguo Shi, Junfeng Wu

In terms of whether the variance of measurement noises is known or not, we propose the Bias-Eli estimator (which involves solving a generalized trust region subproblem) and the Noise-Est estimator (which is obtained by solving a convex problem), respectively.

Position

SeqFormer: Sequential Transformer for Video Instance Segmentation

2 code implementations15 Dec 2021 Junfeng Wu, Yi Jiang, Song Bai, Wenqing Zhang, Xiang Bai

Nevertheless, we observe that a stand-alone instance query suffices for capturing a time sequence of instances in a video, but attention mechanisms shall be done with each frame independently.

Instance Segmentation Semantic Segmentation +1

Low-complexity Distributed Detection with One-bit Memory Under Neyman-Pearson Criterion

no code implementations22 Apr 2021 Guangyang Zeng, Xiaoqiang Ren, Junfeng Wu

We consider a multi-stage distributed detection scenario, where $n$ sensors and a fusion center (FC) are deployed to accomplish a binary hypothesis test.

Decision Making

Event-Triggered Distributed Estimation With Decaying Communication Rate

no code implementations10 Mar 2021 Xingkang He, Yu Xing, Junfeng Wu, Karl H. Johansson

We show that given the step size, adjusting the decay speed of the triggering threshold can lead to a tradeoff between the convergence rate of the estimation error and the decay speed of the communication rate.

ParaVS: A Simple, Fast, Efficient and Flexible Graph Neural Network Framework for Structure-Based Virtual Screening

no code implementations8 Feb 2021 Junfeng Wu, Dawei Leng, Lurong Pan

However, the docking process can hardly be computationally efficient and accurate simultaneously because classic mechanics scoring function is used to approximate, but hardly reach, the quantum mechanics precision in this method.

Molecular Docking

Super-Resolution Domain Adaptation Networks for Semantic Segmentation via Pixel and Output Level Aligning

1 code implementation13 May 2020 Junfeng Wu, Zhenjie Tang, Congan Xu, Enhai Liu, Long Gao, Wenjun Yan

SRDA-Net can simultaneously achieve the super-resolution task and the domain adaptation task, thus satisfying the requirement of semantic segmentation for remote sensing images which usually involve various resolution images.

Segmentation Semantic Segmentation +2

Learning Quadratic Games on Networks

no code implementations ICML 2020 Yan Leng, Xiaowen Dong, Junfeng Wu, Alex Pentland

Individuals, or organizations, cooperate with or compete against one another in a wide range of practical situations.

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