Search Results for author: Luping Zhou

Found 61 papers, 25 papers with code

ReDro: Efficiently Learning Large-sized SPD Visual Representation

no code implementations ECCV 2020 Saimunur Rahman, Lei Wang, Changming Sun, Luping Zhou

When learning this representation in deep networks, eigen-decomposition of covariance matrix is usually needed for a key step called matrix normalisation.

Fine-Grained Image Classification

Roll With the Punches: Expansion and Shrinkage of Soft Label Selection for Semi-supervised Fine-Grained Learning

1 code implementation19 Dec 2023 Yue Duan, Zhen Zhao, Lei Qi, Luping Zhou, Lei Wang, Yinghuan Shi

While semi-supervised learning (SSL) has yielded promising results, the more realistic SSL scenario remains to be explored, in which the unlabeled data exhibits extremely high recognition difficulty, e. g., fine-grained visual classification in the context of SSL (SS-FGVC).

Fine-Grained Image Classification Pseudo Label

MedXChat: Bridging CXR Modalities with a Unified Multimodal Large Model

no code implementations4 Dec 2023 Ling Yang, Zhanyu Wang, Luping Zhou

Despite the success of Large Language Models (LLMs) in general image tasks, a gap persists in the medical field for a multimodal large model adept at handling the nuanced diversity of medical images.

Instruction Following Question Answering +1

Alternate Diverse Teaching for Semi-supervised Medical Image Segmentation

1 code implementation29 Nov 2023 Zhen Zhao, Zicheng Wang, Longyue Wang, Yixuan Yuan, Luping Zhou

To mitigate the confirmation bias from the diverse supervision, the core of AD-MT lies in two proposed modules: the Random Periodic Alternate (RPA) Updating Module and the Conflict-Combating Module (CCM).

Data Augmentation Image Segmentation +2

Clean Label Disentangling for Medical Image Segmentation with Noisy Labels

1 code implementation28 Nov 2023 Zicheng Wang, Zhen Zhao, Erjian Guo, Luping Zhou

Current methods focusing on medical image segmentation suffer from incorrect annotations, which is known as the noisy label issue.

Disentanglement Image Segmentation +2

UFDA: Universal Federated Domain Adaptation with Practical Assumptions

no code implementations27 Nov 2023 Xinhui Liu, Zhenghao Chen, Luping Zhou, Dong Xu, Wei Xi, Gairui Bai, Yihan Zhao, Jizhong Zhao

Conventional Federated Domain Adaptation (FDA) approaches usually demand an abundance of assumptions, which makes them significantly less feasible for real-world situations and introduces security hazards.

Domain Adaptation

GPT4Video: A Unified Multimodal Large Language Model for lnstruction-Followed Understanding and Safety-Aware Generation

no code implementations25 Nov 2023 Zhanyu Wang, Longyue Wang, Zhen Zhao, Minghao Wu, Chenyang Lyu, Huayang Li, Deng Cai, Luping Zhou, Shuming Shi, Zhaopeng Tu

While the recent advances in Multimodal Large Language Models (MLLMs) constitute a significant leap forward in the field, these models are predominantly confined to the realm of input-side multimodal comprehension, lacking the capacity for multimodal content generation.

Instruction Following Language Modelling +7

A Systematic Evaluation of GPT-4V's Multimodal Capability for Medical Image Analysis

no code implementations31 Oct 2023 Yingshu Li, Yunyi Liu, Zhanyu Wang, Xinyu Liang, Lei Wang, Lingqiao Liu, Leyang Cui, Zhaopeng Tu, Longyue Wang, Luping Zhou

This work conducts an evaluation of GPT-4V's multimodal capability for medical image analysis, with a focus on three representative tasks of radiology report generation, medical visual question answering, and medical visual grounding.

Descriptive Medical Visual Question Answering +3

Understanding Masked Autoencoders From a Local Contrastive Perspective

no code implementations3 Oct 2023 Xiaoyu Yue, Lei Bai, Meng Wei, Jiangmiao Pang, Xihui Liu, Luping Zhou, Wanli Ouyang

Masked AutoEncoder (MAE) has revolutionized the field of self-supervised learning with its simple yet effective masking and reconstruction strategies.

Contrastive Learning Data Augmentation +1

R2GenGPT: Radiology Report Generation with Frozen LLMs

1 code implementation18 Sep 2023 Zhanyu Wang, Lingqiao Liu, Lei Wang, Luping Zhou

First, it attains state-of-the-art (SOTA) performance by training only the lightweight visual alignment module while freezing all the parameters of LLM.

Enhancing Sample Utilization through Sample Adaptive Augmentation in Semi-Supervised Learning

1 code implementation ICCV 2023 Guan Gui, Zhen Zhao, Lei Qi, Luping Zhou, Lei Wang, Yinghuan Shi

Sample adaptive augmentation (SAA) is proposed for this stated purpose and consists of two modules: 1) sample selection module; 2) sample augmentation module.

A survey on efficient vision transformers: algorithms, techniques, and performance benchmarking

no code implementations5 Sep 2023 Lorenzo Papa, Paolo Russo, Irene Amerini, Luping Zhou

Summarizing, this paper firstly mathematically defines the strategies used to make Vision Transformer efficient, describes and discusses state-of-the-art methodologies, and analyzes their performances over different application scenarios.

Benchmarking Knowledge Distillation +1

Neural Vector Fields: Generalizing Distance Vector Fields by Codebooks and Zero-Curl Regularization

no code implementations4 Sep 2023 Xianghui Yang, Guosheng Lin, Zhenghao Chen, Luping Zhou

Recent neural networks based surface reconstruction can be roughly divided into two categories, one warping templates explicitly and the other representing 3D surfaces implicitly.

Surface Reconstruction

Contrastive Diffusion Model with Auxiliary Guidance for Coarse-to-Fine PET Reconstruction

1 code implementation20 Aug 2023 Zeyu Han, YuHan Wang, Luping Zhou, Peng Wang, Binyu Yan, Jiliu Zhou, Yan Wang, Dinggang Shen

To obtain high-quality positron emission tomography (PET) scans while reducing radiation exposure to the human body, various approaches have been proposed to reconstruct standard-dose PET (SPET) images from low-dose PET (LPET) images.

Automatic Radiology Report Generation by Learning with Increasingly Hard Negatives

1 code implementation11 May 2023 Bhanu Prakash Voutharoja, Lei Wang, Luping Zhou

At each iteration, conditioned on a given set of hard negative reports, image and report features are learned as usual by minimising the loss functions related to report generation.

Medical Report Generation

Learning Partial Correlation based Deep Visual Representation for Image Classification

1 code implementation CVPR 2023 Saimunur Rahman, Piotr Koniusz, Lei Wang, Luping Zhou, Peyman Moghadam, Changming Sun

Our work obtains a partial correlation based deep visual representation and mitigates the small sample problem often encountered by covariance matrix estimation in CNN.

Fine-Grained Image Classification

METransformer: Radiology Report Generation by Transformer with Multiple Learnable Expert Tokens

no code implementations CVPR 2023 Zhanyu Wang, Lingqiao Liu, Lei Wang, Luping Zhou

In the encoder, each expert token interacts with both vision tokens and other expert tokens to learn to attend different image regions for image representation.

Q2ATransformer: Improving Medical VQA via an Answer Querying Decoder

no code implementations4 Apr 2023 Yunyi Liu, Zhanyu Wang, Dong Xu, Luping Zhou

To bridge this gap, in this paper, we propose a new Transformer based framework for medical VQA (named as Q2ATransformer), which integrates the advantages of both the classification and the generation approaches and provides a unified treatment for the close-end and open-end questions.

Classification Medical Visual Question Answering +2

Neural Vector Fields: Implicit Representation by Explicit Learning

2 code implementations CVPR 2023 Xianghui Yang, Guosheng Lin, Zhenghao Chen, Luping Zhou

Deep neural networks (DNNs) are widely applied for nowadays 3D surface reconstruction tasks and such methods can be further divided into two categories, which respectively warp templates explicitly by moving vertices or represent 3D surfaces implicitly as signed or unsigned distance functions.

Quantization Surface Reconstruction

Conflict-Based Cross-View Consistency for Semi-Supervised Semantic Segmentation

1 code implementation CVPR 2023 Zicheng Wang, Zhen Zhao, Xiaoxia Xing, Dong Xu, Xiangyu Kong, Luping Zhou

In this work, we propose a new conflict-based cross-view consistency (CCVC) method based on a two-branch co-training framework which aims at enforcing the two sub-nets to learn informative features from irrelevant views.

Semi-Supervised Semantic Segmentation

Bridging Synthetic and Real Images: a Transferable and Multiple Consistency aided Fundus Image Enhancement Framework

no code implementations23 Feb 2023 Erjian Guo, Huazhu Fu, Luping Zhou, Dong Xu

Moreover, we also propose a novel multi-stage multi-attention guided enhancement network (MAGE-Net) as the backbones of our teacher and student network.

Domain Adaptation Image Enhancement

Learning Spatial-context-aware Global Visual Feature Representation for Instance Image Retrieval

1 code implementation ICCV 2023 Zhongyan Zhang, Lei Wang, Luping Zhou, Piotr Koniusz

To this end, we propose a novel feature learning framework for instance image retrieval, which embeds local spatial context information into the learned global feature representations.

Image Retrieval Retrieval

Augmentation Matters: A Simple-yet-Effective Approach to Semi-supervised Semantic Segmentation

1 code implementation CVPR 2023 Zhen Zhao, Lihe Yang, Sifan Long, Jimin Pi, Luping Zhou, Jingdong Wang

Differently, in this work, we follow a standard teacher-student framework and propose AugSeg, a simple and clean approach that focuses mainly on data perturbations to boost the SSS performance.

Semi-Supervised Semantic Segmentation

Instance-specific and Model-adaptive Supervision for Semi-supervised Semantic Segmentation

1 code implementation CVPR 2023 Zhen Zhao, Sifan Long, Jimin Pi, Jingdong Wang, Luping Zhou

Relying on the model's performance, iMAS employs a class-weighted symmetric intersection-over-union to evaluate quantitative hardness of each unlabeled instance and supervises the training on unlabeled data in a model-adaptive manner.

Segmentation Semi-Supervised Semantic Segmentation

A Medical Semantic-Assisted Transformer for Radiographic Report Generation

no code implementations22 Aug 2022 Zhanyu Wang, Mingkang Tang, Lei Wang, Xiu Li, Luping Zhou

Automated radiographic report generation is a challenging cross-domain task that aims to automatically generate accurate and semantic-coherence reports to describe medical images.

Image Captioning Medical Report Generation

Instance Image Retrieval by Learning Purely From Within the Dataset

no code implementations12 Aug 2022 Zhongyan Zhang, Lei Wang, Yang Wang, Luping Zhou, Jianjia Zhang, Peng Wang, Fang Chen

Although achieving promising results, this approach is restricted by two issues: 1) the domain gap between benchmark datasets and the dataset of a given retrieval task; 2) the required auxiliary dataset cannot be readily obtained.

Image Retrieval Retrieval +2

RDA: Reciprocal Distribution Alignment for Robust Semi-supervised Learning

3 code implementations9 Aug 2022 Yue Duan, Lei Qi, Lei Wang, Luping Zhou, Yinghuan Shi

In this work, we propose Reciprocal Distribution Alignment (RDA) to address semi-supervised learning (SSL), which is a hyperparameter-free framework that is independent of confidence threshold and works with both the matched (conventionally) and the mismatched class distributions.

Semi-Supervised Image Classification

Single-view 3D Mesh Reconstruction for Seen and Unseen Categories

1 code implementation4 Aug 2022 Xianghui Yang, Guosheng Lin, Luping Zhou

Single-view 3D object reconstruction is a fundamental and challenging computer vision task that aims at recovering 3D shapes from single-view RGB images.

3D Object Reconstruction

Action Recognition With Motion Diversification and Dynamic Selection

no code implementations TIP 2022 Peiqin Zhuang, Yu Guo, Zhipeng Yu, Luping Zhou, Lei Bai, Ding Liang, Zhiyong Wang, Yali Wang, Wanli Ouyang

To address this issue, we introduce a Motion Diversification and Selection (MoDS) module to generate diversified spatio-temporal motion features and then select the suitable motion representation dynamically for categorizing the input video.

Action Recognition Computational Efficiency

Inverse design of nano-photonic wavelength demultiplexer with a deep neural network approach

no code implementations15 May 2022 Mengwei Yuan, Gang Yang, Shijie Song, Luping Zhou, Robert Minasian, Xiaoke Yi

The correlation coefficient of the prediction by the presented PTCN model remains greater than 0. 974 even when the size of training data is decreased to 17%.

MutexMatch: Semi-Supervised Learning with Mutex-Based Consistency Regularization

3 code implementations27 Mar 2022 Yue Duan, Zhen Zhao, Lei Qi, Lei Wang, Luping Zhou, Yinghuan Shi, Yang Gao

The core issue in semi-supervised learning (SSL) lies in how to effectively leverage unlabeled data, whereas most existing methods tend to put a great emphasis on the utilization of high-confidence samples yet seldom fully explore the usage of low-confidence samples.

Semi-Supervised Image Classification

Few-shot Unsupervised Domain Adaptation with Image-to-class Sparse Similarity Encoding

no code implementations6 Aug 2021 Shengqi Huang, Wanqi Yang, Lei Wang, Luping Zhou, Ming Yang

Inspired by the recent local descriptor based few-shot learning (FSL), our general UDA model is fully built upon local descriptors (LDs) for image classification and domain adaptation.

Few-Shot Learning Image Classification +1

Crosslink-Net: Double-branch Encoder Segmentation Network via Fusing Vertical and Horizontal Convolutions

1 code implementation24 Jul 2021 Qian Yu, Lei Qi, Luping Zhou, Lei Wang, Yilong Yin, Yinghuan Shi, Wuzhang Wang, Yang Gao

Together, the above two schemes give rise to a novel double-branch encoder segmentation framework for medical image segmentation, namely Crosslink-Net.

Image Segmentation Medical Image Segmentation +2

A Self-Boosting Framework for Automated Radiographic Report Generation

no code implementations CVPR 2021 Zhanyu Wang, Luping Zhou, Lei Wang, Xiu Li

On one hand, the image-text matching branch helps to learn highly text-correlated visual features for the report generation branch to output high quality reports.

Image Captioning Image-text matching +3

ASMFS: Adaptive-Similarity-based Multi-modality Feature Selection for Classification of Alzheimer's Disease

no code implementations16 Oct 2020 Yuang Shi, Chen Zu, Mei Hong, Luping Zhou, Lei Wang, Xi Wu, Jiliu Zhou, Daoqiang Zhang, Yan Wang

With the increasing amounts of high-dimensional heterogeneous data to be processed, multi-modality feature selection has become an important research direction in medical image analysis.

feature selection General Classification

Improving Auto-Augment via Augmentation-Wise Weight Sharing

1 code implementation NeurIPS 2020 Keyu Tian, Chen Lin, Ming Sun, Luping Zhou, Junjie Yan, Wanli Ouyang

On CIFAR-10, we achieve a top-1 error rate of 1. 24%, which is currently the best performing single model without extra training data.

Class Distribution Alignment for Adversarial Domain Adaptation

no code implementations20 Apr 2020 Wanqi Yang, Tong Ling, Chengmei Yang, Lei Wang, Yinghuan Shi, Luping Zhou, Ming Yang

To address this issue, we propose a novel approach called Conditional ADversarial Image Translation (CADIT) to explicitly align the class distributions given samples between the two domains.

General Classification Translation +1

Epileptic Seizure Classification with Symmetric and Hybrid Bilinear Models

1 code implementation15 Jan 2020 Tennison Liu, Nhan Duy Truong, Armin Nikpour, Luping Zhou, Omid Kavehei

Epilepsy affects nearly 1% of the global population, of which two thirds can be treated by anti-epileptic drugs and a much lower percentage by surgery.

Classification General Classification

Deep Learning based HEp-2 Image Classification: A Comprehensive Review

no code implementations20 Nov 2019 Saimunur Rahman, Lei Wang, Changming Sun, Luping Zhou

This paper provides a comprehensive review of the existing deep learning based HEp-2 cell image classification methods.

Classification General Classification +1

Improving Action Localization by Progressive Cross-stream Cooperation

no code implementations CVPR 2019 Rui Su, Wanli Ouyang, Luping Zhou, Dong Xu

Specifically, we first generate a larger set of region proposals by combining the latest region proposals from both streams, from which we can readily obtain a larger set of labelled training samples to help learn better action detection models.

Action Classification Action Detection +2

A Novel Unsupervised Camera-aware Domain Adaptation Framework for Person Re-identification

no code implementations ICCV 2019 Lei Qi, Lei Wang, Jing Huo, Luping Zhou, Yinghuan Shi, Yang Gao

For the first issue, we highlight the presence of camera-level sub-domains as a unique characteristic of person Re-ID, and develop camera-aware domain adaptation to reduce the discrepancy not only between source and target domains but also across these sub-domains.

Person Re-Identification Representation Learning +1

DeepKSPD: Learning Kernel-matrix-based SPD Representation for Fine-grained Image Recognition

no code implementations ECCV 2018 Melih Engin, Lei Wang, Luping Zhou, Xinwang Liu

Being symmetric positive-definite (SPD), covariance matrix has traditionally been used to represent a set of local descriptors in visual recognition.

Fine-Grained Image Recognition

Revisiting Metric Learning for SPD Matrix Based Visual Representation

no code implementations CVPR 2017 Luping Zhou, Lei Wang, Jianjia Zhang, Yinghuan Shi, Yang Gao

The proposed method has been tested on multiple SPD-based visual representation data sets used in the literature, and the results demonstrate its interesting properties and attractive performance.

Metric Learning

Exploiting Structure Sparsity for Covariance-based Visual Representation

no code implementations27 Oct 2016 Jianjia Zhang, Lei Wang, Luping Zhou, Wanqing Li

A variety of methods have been proposed to boost its efficacy, with some recent ones resorting to nonlinear kernel technique.

Action Recognition Temporal Action Localization

OPML: A One-Pass Closed-Form Solution for Online Metric Learning

no code implementations29 Sep 2016 Wenbin Li, Yang Gao, Lei Wang, Luping Zhou, Jing Huo, Yinghuan Shi

To achieve a low computational cost when performing online metric learning for large-scale data, we present a one-pass closed-form solution namely OPML in this paper.

Event Detection Face Verification +1

Beyond Covariance: Feature Representation With Nonlinear Kernel Matrices

no code implementations ICCV 2015 Lei Wang, Jianjia Zhang, Luping Zhou, Chang Tang, Wanqing Li

It proposes an open framework to use the kernel matrix over feature dimensions as a generic representation and discusses its properties and advantages.

Action Recognition Temporal Action Localization

HEp-2 Cell Image Classification with Deep Convolutional Neural Networks

no code implementations10 Apr 2015 Zhimin Gao, Lei Wang, Luping Zhou, Jianjia Zhang

Efficient Human Epithelial-2 (HEp-2) cell image classification can facilitate the diagnosis of many autoimmune diseases.

Classification Data Augmentation +2

Learning Discriminative Stein Kernel for SPD Matrices and Its Applications

1 code implementation8 Jul 2014 Jianjia Zhang, Lei Wang, Luping Zhou, Wanqing Li

A comprehensive experimental study is conducted on a variety of image classification tasks to compare our proposed discriminative Stein kernel with the original Stein kernel and other commonly used methods for evaluating the similarity between SPD matrices.

Classification General Classification +1

Discriminative Sparse Inverse Covariance Matrix: Application in Brain Functional Network Classification

no code implementations CVPR 2014 Luping Zhou, Lei Wang, Philip Ogunbona

In this paper, we propose a learning framework to effectively improve the discriminative power of SICEs by taking advantage of the samples in the opposite class.

General Classification

Multiple Kernel Learning in the Primal for Multi-modal Alzheimer's Disease Classification

no code implementations3 Oct 2013 Fayao Liu, Luping Zhou, Chunhua Shen, Jianping Yin

In this work, we propose a novel multiple kernel learning framework to combine multi-modal features for AD classification, which is scalable and easy to implement.

General Classification

A Fast Approximate AIB Algorithm for Distributional Word Clustering

no code implementations CVPR 2013 Lei Wang, Jianjia Zhang, Luping Zhou, Wanqing Li

Distributional word clustering merges the words having similar probability distributions to attain reliable parameter estimation, compact classification models and even better classification performance.

Clustering Computational Efficiency +4

Discriminative Brain Effective Connectivity Analysis for Alzheimer's Disease: A Kernel Learning Approach upon Sparse Gaussian Bayesian Network

no code implementations CVPR 2013 Luping Zhou, Lei Wang, Lingqiao Liu, Philip Ogunbona, Dinggang Shen

Analyzing brain networks from neuroimages is becoming a promising approach in identifying novel connectivitybased biomarkers for the Alzheimer's disease (AD).

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