Search Results for author: Chun-Guang Li

Found 22 papers, 5 papers with code

Unsupervised Long-Term Person Re-Identification with Clothes Change

no code implementations7 Feb 2022 Mingkun Li, Shupeng Cheng, Peng Xu, Xiatian Zhu, Chun-Guang Li, Jun Guo

We investigate unsupervised person re-identification (Re-ID) with clothes change, a new challenging problem with more practical usability and scalability to real-world deployment.

Clustering Unsupervised Long Term Person Re-Identification +2

Hybrid Contrastive Learning with Cluster Ensemble for Unsupervised Person Re-identification

no code implementations28 Jan 2022 He Sun, Mingkun Li, Chun-Guang Li

The most popular approaches to tackle unsupervised person ReID are usually performing a clustering algorithm to yield pseudo labels at first and then exploit the pseudo labels to train a deep neural network.

Clustering Clustering Ensemble +2

Learning a Self-Expressive Network for Subspace Clustering

1 code implementation CVPR 2021 Shangzhi Zhang, Chong You, René Vidal, Chun-Guang Li

We show that our SENet can not only learn the self-expressive coefficients with desired properties on the training data, but also handle out-of-sample data.

Clustering

Cluster-guided Asymmetric Contrastive Learning for Unsupervised Person Re-Identification

1 code implementation15 Jun 2021 Mingkun Li, Chun-Guang Li, Jun Guo

To be specific, we propose a novel cluster-level contrastive loss to help the siamese network effectively mine the invariance in feature learning with respect to the cluster structure within and between different data augmentation views, respectively.

Clustering Contrastive Learning +2

Learning Graph Normalization for Graph Neural Networks

1 code implementation24 Sep 2020 Yihao Chen, Xin Tang, Xianbiao Qi, Chun-Guang Li, Rong Xiao

We conduct extensive experiments on benchmark datasets for different tasks, including node classification, link prediction, graph classification and graph regression, and confirm that the learned graph normalization leads to competitive results and that the learned weights suggest the appropriate normalization techniques for the specific task.

Graph Classification Graph Regression +2

Is an Affine Constraint Needed for Affine Subspace Clustering?

no code implementations ICCV 2019 Chong You, Chun-Guang Li, Daniel P. Robinson, Rene Vidal

Specifically, our analysis provides conditions that guarantee the correctness of affine subspace clustering methods both with and without the affine constraint, and shows that these conditions are satisfied for high-dimensional data.

Clustering Face Clustering +1

Stochastic Sparse Subspace Clustering

no code implementations CVPR 2020 Ying Chen, Chun-Guang Li, Chong You

State-of-the-art subspace clustering methods are based on self-expressive model, which represents each data point as a linear combination of other data points.

Clustering

Convolutional Subspace Clustering Network with Block Diagonal Prior

no code implementations IEEE Access 2019 Junjian Zhang, Chun-Guang Li, Tianming Du, Honggang Zhang, Jun Guo

Standard methods of subspace clustering are based on self-expressiveness in the original data space, which states that a data point in a subspace can be expressed as a linear combination of other points.

Clustering

Self-Supervised Convolutional Subspace Clustering Network

no code implementations CVPR 2019 Junjian Zhang, Chun-Guang Li, Chong You, Xianbiao Qi, Honggang Zhang, Jun Guo, Zhouchen Lin

However, the applicability of subspace clustering has been limited because practical visual data in raw form do not necessarily lie in such linear subspaces.

Clustering Image Clustering

Online Learning Algorithms for Quaternion ARMA Model

no code implementations26 Apr 2019 Xiaokun Pu, Chun-Guang Li

In this paper, we address the problem of adaptive learning for autoregressive moving average (ARMA) model in the quaternion domain.

Distributed Variational Bayesian Algorithms for Extended Object Tracking

no code implementations1 Mar 2019 Junhao Hua, Chun-Guang Li

This paper is concerned with the problem of distributed extended object tracking, which aims to collaboratively estimate the state and extension of an object by a network of nodes.

Object Object Tracking

On Geometric Analysis of Affine Sparse Subspace Clustering

no code implementations17 Aug 2018 Chun-Guang Li, Chong You, René Vidal

In this paper, we develop a novel geometric analysis for a variant of SSC, named affine SSC (ASSC), for the problem of clustering data from a union of affine subspaces.

Clustering

Constrained Sparse Subspace Clustering with Side-Information

no code implementations21 May 2018 Chun-Guang Li, Junjian Zhang, Jun Guo

Subspace clustering refers to the problem of segmenting high dimensional data drawn from a union of subspaces into the respective subspaces.

Clustering

Density-Adaptive Kernel based Efficient Reranking Approaches for Person Reidentification

no code implementations20 May 2018 Ruo-Pei Guo, Chun-Guang Li, Yonghua Li, Jia-Ru Lin, Jun Guo

In this paper, we propose to exploit a density-adaptive smooth kernel technique to achieve efficient and effective reranking.

Person Re-Identification

Dual Attention Matching Network for Context-Aware Feature Sequence based Person Re-Identification

no code implementations CVPR 2018 Jianlou Si, Honggang Zhang, Chun-Guang Li, Jason Kuen, Xiangfei Kong, Alex C. Kot, Gang Wang

Typical person re-identification (ReID) methods usually describe each pedestrian with a single feature vector and match them in a task-specific metric space.

Person Re-Identification

Structured Sparse Subspace Clustering: A Joint Affinity Learning and Subspace Clustering Framework

no code implementations17 Oct 2016 Chun-Guang Li, Chong You, René Vidal

In this paper, we propose a joint optimization framework --- Structured Sparse Subspace Clustering (S$^3$C) --- for learning both the affinity and the segmentation.

Clustering Motion Segmentation +1

Oracle Based Active Set Algorithm for Scalable Elastic Net Subspace Clustering

1 code implementation CVPR 2016 Chong You, Chun-Guang Li, Daniel P. Robinson, Rene Vidal

Our geometric analysis also provides a theoretical justification and a geometric interpretation for the balance between the connectedness (due to $\ell_2$ regularization) and subspace-preserving (due to $\ell_1$ regularization) properties for elastic net subspace clustering.

Ranked #7 on Image Clustering on coil-100 (Accuracy metric)

Clustering Image Clustering

Learning Semi-Supervised Representation Towards a Unified Optimization Framework for Semi-Supervised Learning

no code implementations ICCV 2015 Chun-Guang Li, Zhouchen Lin, Honggang Zhang, Jun Guo

State of the art approaches for Semi-Supervised Learning (SSL) usually follow a two-stage framework -- constructing an affinity matrix from the data and then propagating the partial labels on this affinity matrix to infer those unknown labels.

Structured Sparse Subspace Clustering: A Unified Optimization Framework

no code implementations CVPR 2015 Chun-Guang Li, Rene Vidal

Our framework is based on expressing each data point as a structured sparse linear combination of all other data points, where the structure is induced by a norm that depends on the unknown segmentation.

Clustering Motion Segmentation +1

HEp-2 Cell Classification via Fusing Texture and Shape Information

no code implementations16 Feb 2015 Xianbiao Qi, Guoying Zhao, Chun-Guang Li, Jun Guo, Matti Pietikäinen

Indirect Immunofluorescence (IIF) HEp-2 cell image is an effective evidence for diagnosis of autoimmune diseases.

Classification General Classification

Dynamic texture and scene classification by transferring deep image features

no code implementations1 Feb 2015 Xianbiao Qi, Chun-Guang Li, Guoying Zhao, Xiaopeng Hong, Matti Pietikäinen

Moreover we explore two different implementations of the TCoF scheme, i. e., the \textit{spatial} TCoF and the \textit{temporal} TCoF, in which the mean-removed frames and the difference between two adjacent frames are used as the inputs of the ConvNet, respectively.

Classification General Classification +2

Cannot find the paper you are looking for? You can Submit a new open access paper.