Search Results for author: Zilei Wang

Found 43 papers, 22 papers with code

Polynomial Regression Network for Variable-Number Lane Detection

no code implementations ECCV 2020 Bingke Wang, Zilei Wang, Yixin Zhang

Most of previous methods utilize semantic segmentation to identify the regions of traffic lanes in an image, and then adopt some curve-fitting method to reconstruct the lanes.

Autonomous Driving Lane Detection +4

Connecting the Dots: Collaborative Fine-tuning for Black-Box Vision-Language Models

no code implementations6 Feb 2024 Zhengbo Wang, Jian Liang, Ran He, Zilei Wang, Tieniu Tan

This paper proposes a \textbf{C}ollabo\textbf{ra}tive \textbf{F}ine-\textbf{T}uning (\textbf{CraFT}) approach for fine-tuning black-box VLMs to downstream tasks, where one only has access to the input prompts and the output predictions of the model.

A Hard-to-Beat Baseline for Training-free CLIP-based Adaptation

1 code implementation6 Feb 2024 Zhengbo Wang, Jian Liang, Lijun Sheng, Ran He, Zilei Wang, Tieniu Tan

Extensive results on 17 datasets validate that our method surpasses or achieves comparable results with state-of-the-art methods on few-shot classification, imbalanced learning, and out-of-distribution generalization.

Out-of-Distribution Generalization

Not all Minorities are Equal: Empty-Class-Aware Distillation for Heterogeneous Federated Learning

no code implementations4 Jan 2024 Kuangpu Guo, Yuhe Ding, Jian Liang, Ran He, Zilei Wang, Tieniu Tan

Data heterogeneity, characterized by disparities in local data distribution across clients, poses a significant challenge in federated learning.

Federated Learning Knowledge Distillation

Revisiting Foreground and Background Separation in Weakly-supervised Temporal Action Localization: A Clustering-based Approach

1 code implementation ICCV 2023 Qinying Liu, Zilei Wang, Shenghai Rong, Junjie Li, Yixin Zhang

It comprises two core components: a snippet clustering component that groups the snippets into multiple latent clusters and a cluster classification component that further classifies the cluster as foreground or background.

Classification Clustering +4

Exploiting Low-confidence Pseudo-labels for Source-free Object Detection

no code implementations19 Oct 2023 Zhihong Chen, Zilei Wang, Yixin Zhang

The LPU module consists of Proposal Soft Training (PST) and Local Spatial Contrastive Learning (LSCL).

Contrastive Learning object-detection +2

Improve Temporal Action Proposals using Hierarchical Context

no code implementations Pattern Recognition 2023 Qinying Liu, Zilei Wang, Shenghai Rong

In this paper, we propose a novel hierarchical context network (HCN) to further explore the snippet-level and proposal-level contexts, which are used to improve the representations of snippets and proposals, respectively.

Action Detection Temporal Action Proposal Generation

SimpleNet: A Simple Network for Image Anomaly Detection and Localization

1 code implementation CVPR 2023 Zhikang Liu, Yiming Zhou, Yuansheng Xu, Zilei Wang

SimpleNet consists of four components: (1) a pre-trained Feature Extractor that generates local features, (2) a shallow Feature Adapter that transfers local features towards target domain, (3) a simple Anomaly Feature Generator that counterfeits anomaly features by adding Gaussian noise to normal features, and (4) a binary Anomaly Discriminator that distinguishes anomaly features from normal features.

Ranked #11 on Anomaly Detection on MVTec AD (using extra training data)

Anomaly Detection Novelty Detection

Semantic Prompt for Few-Shot Image Recognition

1 code implementation CVPR 2023 Wentao Chen, Chenyang Si, Zhang Zhang, Liang Wang, Zilei Wang, Tieniu Tan

Instead of the naive exploitation of semantic information for remedying classifiers, we explore leveraging semantic information as prompts to tune the visual feature extraction network adaptively.

Few-Shot Learning

AdaptGuard: Defending Against Universal Attacks for Model Adaptation

1 code implementation ICCV 2023 Lijun Sheng, Jian Liang, Ran He, Zilei Wang, Tieniu Tan

To address this issue, we propose a model preprocessing framework, named AdaptGuard, to improve the security of model adaptation algorithms.

Knowledge Distillation Transfer Learning

Exploiting Semantic Attributes for Transductive Zero-Shot Learning

1 code implementation17 Mar 2023 Zhengbo Wang, Jian Liang, Zilei Wang, Tieniu Tan

To address this issue, we present a novel transductive ZSL method that produces semantic attributes of the unseen data and imposes them on the generative process.

Attribute Generative Adversarial Network +1

Video Semantic Segmentation with Inter-Frame Feature Fusion and Inner-Frame Feature Refinement

1 code implementation10 Jan 2023 Jiafan Zhuang, Zilei Wang, Junjie Li

In this paper, to tackle the misalignment issue, we propose a spatial-temporal fusion (STF) module to model dense pairwise relationships among multi-frame features.

Optical Flow Estimation Semantic Segmentation +1

Class Relationship Embedded Learning for Source-Free Unsupervised Domain Adaptation

no code implementations CVPR 2023 Yixin Zhang, Zilei Wang, Weinan He

To this end, we first regard the classifier weights of the source model as class prototypes to compute class relationship, and then propose a novel probability-based similarity between target-domain samples by embedding the source-domain class relationship, resulting in Class Relationship embedded Similarity (CRS).

Contrastive Learning Transfer Learning +1

Preparing the Future for Continual Semantic Segmentation

no code implementations ICCV 2023 Zihan Lin, Zilei Wang, Yixin Zhang

In this study, we focus on Continual Semantic Segmentation (CSS) and present a novel approach to tackle the issue of existing methods struggling to learn new classes.

Continual Semantic Segmentation Semantic Segmentation

MSRA-SR: Image Super-resolution Transformer with Multi-scale Shared Representation Acquisition

no code implementations ICCV 2023 Xiaoqiang Zhou, Huaibo Huang, Ran He, Zilei Wang, Jie Hu, Tieniu Tan

In particular, self-attention with cross-scale matching and convolution filters with different kernel sizes are designed to exploit the multi-scale features in images.

Image Super-Resolution

Boundary-Enhanced Co-Training for Weakly Supervised Semantic Segmentation

1 code implementation CVPR 2023 Shenghai Rong, Bohai Tu, Zilei Wang, Junjie Li

The existing weakly supervised semantic segmentation (WSSS) methods pay much attention to generating accurate and complete class activation maps (CAMs) as pseudo-labels, while ignoring the importance of training the segmentation networks.

Segmentation Weakly supervised Semantic Segmentation +1

Collaborating Domain-shared and Target-specific Feature Clustering for Cross-domain 3D Action Recognition

1 code implementation20 Jul 2022 Qinying Liu, Zilei Wang

Furthermore, to leverage the complementarity of domain-shared features and target-specific features, we propose a novel collaborative clustering strategy to enforce pair-wise relationship consistency between the two branches.

Clustering Contrastive Learning +6

Cross-Domain Cross-Set Few-Shot Learning via Learning Compact and Aligned Representations

1 code implementation16 Jul 2022 Wentao Chen, Zhang Zhang, Wei Wang, Liang Wang, Zilei Wang, Tieniu Tan

Different from previous cross-domain FSL work (CD-FSL) that considers the domain shift between base and novel classes, the new problem, termed cross-domain cross-set FSL (CDSC-FSL), requires few-shot learners not only to adapt to the new domain, but also to be consistent between different domains within each novel class.

Few-Shot Learning

Disentangled Federated Learning for Tackling Attributes Skew via Invariant Aggregation and Diversity Transferring

no code implementations14 Jun 2022 Zhengquan Luo, Yunlong Wang, Zilei Wang, Zhenan Sun, Tieniu Tan

Attributes skew hinders the current federated learning (FL) frameworks from consistent optimization directions among the clients, which inevitably leads to performance reduction and unstable convergence.

Federated Learning valid

Unleashing the Potential of Adjacent Snippets for Weakly-supervised Temporal Action Localization

1 code implementation1 May 2022 Qinying Liu, Zilei Wang, Ruoxi Chen, Zhilin Li

C$^3$BN consists of two key ingredients: a micro data augmentation strategy that increases the diversity in-between adjacent snippets by convex combination of adjacent snippets, and a macro-micro consistency regularization that enforces the model to be invariant to the transformations~\textit{w. r. t.}

Data Augmentation Video Classification +3

Low-confidence Samples Matter for Domain Adaptation

1 code implementation6 Feb 2022 Yixin Zhang, Junjie Li, Zilei Wang

Representing the target data structure in such a way would overlook the huge low-confidence samples, resulting in sub-optimal transferability that is biased towards the samples similar to the source domain.

Contrastive Learning Domain Adaptation

Semi-Supervised Video Semantic Segmentation With Inter-Frame Feature Reconstruction

1 code implementation CVPR 2022 Jiafan Zhuang, Zilei Wang, Yuan Gao

For this task, we observe that the overfitting is surprisingly severe between labeled and unlabeled frames within a training video although they are very similar in style and contents.

Segmentation Semantic Segmentation +1

5th Place Solution for VSPW 2021 Challenge

no code implementations13 Dec 2021 Jiafan Zhuang, Yixin Zhang, Xinyu Hu, Junjie Li, Zilei Wang

In this article, we introduce the solution we used in the VSPW 2021 Challenge.

Semantic Segmentation

Probabilistic Contrastive Learning for Domain Adaptation

2 code implementations11 Nov 2021 Junjie Li, Yixin Zhang, Zilei Wang, Keyu Tu, Saihui Hou

However, it is undesirably observed that the standard contrastive paradigm (features+$\ell_{2}$ normalization) only brings little help for domain adaptation.

Contrastive Learning Representation Learning +4

RPN Prototype Alignment for Domain Adaptive Object Detector

no code implementations CVPR 2021 Yixin Zhang, Zilei Wang, Yushi Mao

It essentially cooperates the learning of RPN prototypes and features to align the source and target RPN features.

Object object-detection +2

Video Semantic Segmentation with Distortion-Aware Feature Correction

1 code implementation18 Jun 2020 Jiafan Zhuang, Zilei Wang, Bingke Wang

Video semantic segmentation is active in recent years benefited from the great progress of image semantic segmentation.

Image Segmentation Optical Flow Estimation +4

Adaptive and Azimuth-Aware Fusion Network of Multimodal Local Features for 3D Object Detection

no code implementations10 Oct 2019 Yonglin Tian, Kunfeng Wang, Yuang Wang, Yulin Tian, Zilei Wang, Fei-Yue Wang

We adopt different modalities of LiDAR data to generate richer features and present an adaptive and azimuth-aware network to aggregate local features from image, bird's eye view maps and point cloud.

3D Object Detection object-detection +1

Meta-SR: A Magnification-Arbitrary Network for Super-Resolution

2 code implementations CVPR 2019 Xuecai Hu, Haoyuan Mu, Xiangyu Zhang, Zilei Wang, Tieniu Tan, Jian Sun

In this work, we propose a novel method called Meta-SR to firstly solve super-resolution of arbitrary scale factor (including non-integer scale factors) with a single model.

Image Super-Resolution

Towards Human-Level License Plate Recognition

no code implementations ECCV 2018 Jiafan Zhuang, Saihui Hou, Zilei Wang, Zheng-Jun Zha

License plate recognition (LPR) is a fundamental component of various intelligent transport systems, which is always expected to be accurate and efficient enough.

License Plate Recognition Semantic Segmentation

End-to-end View Synthesis for Light Field Imaging with Pseudo 4DCNN

no code implementations ECCV 2018 Yunlong Wang, Fei Liu, Zilei Wang, Guangqi Hou, Zhenan Sun, Tieniu Tan

Limited angular resolution has become the main bottleneck of microlens-based plenoptic cameras towards practical vision applications.

Computational Efficiency Depth Estimation

VegFru: A Domain-Specific Dataset for Fine-Grained Visual Categorization

2 code implementations ICCV 2017 Saihui Hou, Yushan Feng, Zilei Wang

While the existing datasets for FGVC are mainly focused on animal breeds or man-made objects with limited labelled data, VegFru is a larger dataset consisting of vegetables and fruits which are closely associated with the daily life of everyone.

Fine-Grained Visual Categorization Management

DualNet: Learn Complementary Features for Image Recognition

1 code implementation ICCV 2017 Saihui Hou, Xu Liu, Zilei Wang

Here two parallel neural networks are coordinated to learn complementary features and thus a wider network is constructed.

Highway Vehicle Counting in Compressed Domain

no code implementations CVPR 2016 Xu Liu, Zilei Wang, Jiashi Feng, Hongsheng Xi

HCR hierarchically divides the traffic scenes into different cases according to vehicle density, such that the broad-variation characteristics of traffic scenes can be better approximated.

Deeply Exploit Depth Information for Object Detection

no code implementations8 May 2016 Saihui Hou, Zilei Wang, Feng Wu

This paper addresses the issue on how to more effectively coordinate the depth with RGB aiming at boosting the performance of RGB-D object detection.

Object object-detection +1

Look and Think Twice: Capturing Top-Down Visual Attention With Feedback Convolutional Neural Networks

no code implementations ICCV 2015 Chunshui Cao, Xian-Ming Liu, Yi Yang, Yinan Yu, Jiang Wang, Zilei Wang, Yongzhen Huang, Liang Wang, Chang Huang, Wei Xu, Deva Ramanan, Thomas S. Huang

While feedforward deep convolutional neural networks (CNNs) have been a great success in computer vision, it is important to remember that the human visual contex contains generally more feedback connections than foward connections.

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