Search Results for author: Zengfu Wang

Found 23 papers, 3 papers with code

An Index Policy Based on Sarsa and Q-learning for Heterogeneous Smart Target Tracking

no code implementations19 Feb 2024 Yuhang Hao, Zengfu Wang, Jing Fu, Quan Pan

Each bandit process is associated with a smart target, of which the estimation state evolves according to different discrete dynamic models for different actions - whether or not the target is being tracked.

Q-Learning Scheduling

Joint State Estimation and Noise Identification Based on Variational Optimization

no code implementations15 Dec 2023 Hua Lan, Shijie Zhao, Jinjie Hu, Zengfu Wang, Jing Fu

In this article, the state estimation problems with unknown process noise and measurement noise covariances for both linear and nonlinear systems are considered.

Variational Inference

Non-myopic Beam Scheduling for Multiple Smart Target Tracking in Phased Array Radar Network

no code implementations13 Dec 2023 Yuhang Hao, Zengfu Wang, José Niño-Mora, Jing Fu, Min Yang, Quan Pan

We present numerical evidence that the model satisfies sufficient conditions for indexability (existence of the Whittle index) based upon partial conservation laws, and, through extensive simulations, we validate the effectiveness of the proposed policy in different scenarios.

Scheduling

Classification-Aided Robust Multiple Target Tracking Using Neural Enhanced Message Passing

no code implementations19 Oct 2023 Xianglong Bai, Zengfu Wang, Quan Pan, Tao Yun, Hua Lan

We first introduce a novel neural enhanced message passing approach, where the beliefs obtained by the unified message passing are fed into the neural network as additional information.

Exploring Part-Informed Visual-Language Learning for Person Re-Identification

no code implementations4 Aug 2023 Yin Lin, Cong Liu, Yehansen Chen, Jinshui Hu, Bing Yin, BaoCai Yin, Zengfu Wang

Recently, visual-language learning has shown great potential in enhancing visual-based person re-identification (ReID).

Human Parsing Person Re-Identification

Combinatorial-restless-bandit-based Transmitter-Receiver Online Selection for Distributed MIMO Radars With Non-Stationary Channels

no code implementations16 Jun 2023 Yuhang Hao, Zengfu Wang, Jing Fu, Xianglong Bai, Can Li, Quan Pan

We track moving targets with a distributed multiple-input multiple-output (MIMO) radar, for which the transmitters and receivers are appropriately paired and selected with a limited number of radar stations.

Variational Nonlinear Kalman Filtering with Unknown Process Noise Covariance

no code implementations6 May 2023 Hua Lan, Jinjie Hu, Zengfu Wang, Qiang Cheng

Motivated by the maneuvering target tracking with sensors such as radar and sonar, this paper considers the joint and recursive estimation of the dynamic state and the time-varying process noise covariance in nonlinear state space models.

Bayesian Inference Variational Inference

Data Augmentation and Classification of Sea-Land Clutter for Over-the-Horizon Radar Using AC-VAEGAN

no code implementations3 Jan 2023 Xiaoxuan Zhang, Zengfu Wang, Kun Lu, Quan Pan

Using a dataset of OTHR sea-land clutter, both the quality of the synthetic samples and the performance of data augmentation of AC-VAEGAN are verified.

Classification Data Augmentation +1

Robust Multitarget Tracking in Interference Environments: A Message-Passing Approach

no code implementations14 Dec 2022 Xianglong Bai, Hua Lan, Zengfu Wang, Quan Pan, Yuhang Hao, Can Li

Then, a unified MP algorithm is used to infer the marginal posterior probability distributions of targets, clutter, and data association by splitting the joint probability distribution into a mean-field approximate part and a belief propagation part.

Crowd counting with segmentation attention convolutional neural network

no code implementations15 Apr 2022 Jiwei Chen, Zengfu Wang

With the guidance of an attention mechanism, the proposed SegCrowdNet pays more attention to the human head region and automatically encodes the highly refined density map.

Crowd Counting

SSR-HEF: Crowd Counting with Multi-Scale Semantic Refining and Hard Example Focusing

no code implementations15 Apr 2022 Jiwei Chen, Kewei Wang, Wen Su, Zengfu Wang

Existing methods with simple Euclidean distance algorithm indiscriminately optimize the hard and easy examples so that the densities of hard examples are usually incorrectly predicted to be lower or even zero, which results in large counting errors.

Crowd Counting regression

Crowd counting with crowd attention convolutional neural network

no code implementations15 Apr 2022 Jiwei Chen, Wen Su, Zengfu Wang

Crowd counting is a challenging problem due to the scene complexity and scale variation.

Crowd Counting

Submarine Cable Network Design for Regional Connectivity

no code implementations15 Jan 2022 Tianjiao Wang, Zengfu Wang, Bill Moran, Moshe Zukerman

It differs from the Euclidean Steiner tree problem, where Steiner points are forced to have degree three; this is no longer the case, in general, when nodes incur a cost.

Steiner Tree Problem

On Exploring and Improving Robustness of Scene Text Detection Models

1 code implementation12 Oct 2021 Shilian Wu, Wei Zhai, Yongrui Li, Kewei Wang, Zengfu Wang

It is crucial to understand the robustness of text detection models with regard to extensive corruptions, since scene text detection techniques have many practical applications.

Region Proposal Scene Text Detection +2

Greedy Offset-Guided Keypoint Grouping for Human Pose Estimation

1 code implementation7 Jul 2021 Jia Li, Linhua Xiang, Jiwei Chen, Zengfu Wang

Given an image, we employ an Hourglass Network to infer all the keypoints from different persons indiscriminately as well as the guiding offsets connecting the adjacent keypoints belonging to the same persons.

2D Human Pose Estimation Keypoint Detection +1

Optimal Tree Topology for a Submarine Cable Network With Constrained Internodal Latency

no code implementations28 Jul 2020 Tianjiao Wang, Zengfu Wang, Bill Moran, Moshe Zukerman

For cable systems for which ILP is not able to find the optimal solution within an acceptable time, we propose an alternative heuristic algorithm based on Prim's algorithm.

OTHR multitarget tracking with a GMRF model of ionospheric parameters

no code implementations5 May 2020 Zhen Guo, Zengfu Wang, Hua Lan, Quan Pan, Kun Lu

Therefore, to improve the localization accuracy of OTHR, it is important to develop accurate models and estimation methods of ionospheric parameters and the corresponding target tracking algorithms.

Grand Challenge of 106-Point Facial Landmark Localization

no code implementations9 May 2019 Yinglu Liu, Hao Shen, Yue Si, Xiaobo Wang, Xiangyu Zhu, Hailin Shi, Zhibin Hong, Hanqi Guo, Ziyuan Guo, Yanqin Chen, Bi Li, Teng Xi, Jun Yu, Haonian Xie, Guochen Xie, Mengyan Li, Qing Lu, Zengfu Wang, Shenqi Lai, Zhenhua Chai, Xiaoming Wei

However, previous competitions on facial landmark localization (i. e., the 300-W, 300-VW and Menpo challenges) aim to predict 68-point landmarks, which are incompetent to depict the structure of facial components.

Face Alignment Face Recognition +2

Joint Target Detection and Tracking in Multipath Environment: A Variational Bayesian Approach

no code implementations27 Oct 2016 Hua Lan, Shuai Sun, Zengfu Wang, Quan Pan, Zhishan Zhang

We consider multitarget detection and tracking problem for a class of multipath detection system where one target may generate multiple measurements via multiple propagation paths, and the association relationship among targets, measurements and propagation paths is unknown.

Bayesian Inference

Nighttime Haze Removal with Illumination Correction

no code implementations5 Jun 2016 Jing Zhang, Yang Cao, Zengfu Wang

ii) Then it achieves a color-balance result by performing a color correction step after estimating the color characteristics of the incident light.

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