Search Results for author: Chang Tang

Found 25 papers, 9 papers with code

Multi-level Graph Subspace Contrastive Learning for Hyperspectral Image Clustering

no code implementations8 Apr 2024 Jingxin Wang, Renxiang Guan, Kainan Gao, Zihao Li, Hao Li, Xianju Li, Chang Tang

Multi-level graph subspace contrastive learning: multi-level contrastive learning was conducted to obtain local-global joint graph representations, to improve the consistency of the positive samples between views, and to obtain more robust graph embeddings.

Clustering Contrastive Learning +1

Pixel-Superpixel Contrastive Learning and Pseudo-Label Correction for Hyperspectral Image Clustering

no code implementations15 Dec 2023 Renxiang Guan, Zihao Li, Xianju Li, Chang Tang

The pixel-level contrastive learning method can effectively improve the ability of the model to capture fine features of HSI but requires a large time overhead.

Clustering Contrastive Learning +2

MS-Former: Memory-Supported Transformer for Weakly Supervised Change Detection with Patch-Level Annotations

1 code implementation16 Nov 2023 Zhenglai Li, Chang Tang, Xinwang Liu, Changdong Li, Xianju Li, Wei zhang

How to capture the semantic variations associated with the changed and unchanged regions from the patch-level annotations to obtain promising change results is the critical challenge for the weakly supervised change detection task.

Change Detection

Central Similarity Multi-View Hashing for Multimedia Retrieval

no code implementations26 Aug 2023 Jian Zhu, Wen Cheng, Yu Cui, Chang Tang, Yuyang Dai, Yong Li, Lingfang Zeng

Hash representation learning of multi-view heterogeneous data is the key to improving the accuracy of multimedia retrieval.

Representation Learning Retrieval

End-to-end Hyperspectral Image Change Detection Network Based on Band Selection

no code implementations23 Jul 2023 Qingren Yao, Yuan Zhou, Chang Tang, Wei Xiang

For hyperspectral image change detection (HSI-CD), one key challenge is to reduce band redundancy, as only a few bands are crucial for change detection while other bands may be adverse to it.

Change Detection

Object Detection in Hyperspectral Image via Unified Spectral-Spatial Feature Aggregation

1 code implementation14 Jun 2023 Xiao He, Chang Tang, Xinwang Liu, Wei zhang, Kun Sun, Jiangfeng Xu

S2ADet comprises a hyperspectral information decoupling (HID) module, a two-stream feature extraction network, and a one-stage detection head.

Object object-detection +1

Towards Accurate and Reliable Change Detection of Remote Sensing Images via Knowledge Review and Online Uncertainty Estimation

1 code implementation31 May 2023 Zhenglai Li, Chang Tang, Xianju Li, Weiying Xie, Kun Sun, Xinzhong Zhu

Specifically, an online uncertainty estimation branch is constructed to model the pixel-wise uncertainty, which is supervised by the difference between predicted change maps and corresponding ground truth during the training process.

Change Detection Management

GCFAgg: Global and Cross-view Feature Aggregation for Multi-view Clustering

1 code implementation CVPR 2023 Weiqing Yan, Yuanyang Zhang, Chenlei Lv, Chang Tang, Guanghui Yue, Liang Liao, Weisi Lin

However, most existing deep clustering methods learn consensus representation or view-specific representations from multiple views via view-wise aggregation way, where they ignore structure relationship of all samples.

Clustering Contrastive Learning +1

High-order Correlation Preserved Incomplete Multi-view Subspace Clustering

3 code implementations IEEE Transactions on Image Processing 2022 Zhenglai Li, Chang Tang, Xiao Zheng, Xinwang Liu, Senior Member, Wei zhang, Member, IEEE, and En Zhu

Specifically, multiple affinity matrices constructed from the incomplete multi-view data are treated as a thirdorder low rank tensor with a tensor factorization regularization which preserves the high-order view correlation and sample correlation.

Clustering Incomplete multi-view clustering +2

Tensor-Based Multi-View Block-Diagonal Structure Diffusion for Clustering Incomplete Multi-View Data

1 code implementation IEEE International Conference on Multimedia and Expo 2021 Zhenglai Li, Chang Tang, Xinwang Liu, Xiao Zheng, Wei zhang, En Zhu

In this paper, we propose a novel incomplete multi-view clustering method, in which a tensor nuclear norm regularizer elegantly diffuses the information of multi-view block-diagonal structure across different views.

Clustering Incomplete multi-view clustering

Consensus Graph Learning for Multi-view Clustering

1 code implementation IEEE Transactions on Multimedia 2021 Zhenglai Li, Chang Tang, Xinwang Liu, Xiao Zheng, Guanghui Yue, Wei zhang

Furthermore, we unify the spectral embedding and low rank tensor learning into a unified optimization framework to determine the spectral embedding matrices and tensor representation jointly.

Clustering Graph Learning

Localized Simple Multiple Kernel K-Means

1 code implementation ICCV 2021 Xinwang Liu, Sihang Zhou, Li Liu, Chang Tang, Siwei Wang, Jiyuan Liu, Yi Zhang

After that, we theoretically show that the objective of SimpleMKKM is a special case of this local kernel alignment criterion with normalizing each base kernel matrix.

Clustering

Unsupervised Domain Expansion from Multiple Sources

no code implementations26 May 2020 Jing Zhang, Wanqing Li, Lu Sheng, Chang Tang, Philip Ogunbona

Given an existing system learned from previous source domains, it is desirable to adapt the system to new domains without accessing and forgetting all the previous domains in some applications.

Domain Adaptation Unsupervised Domain Expansion

Simultaneous Clustering and Optimization for Evolving Datasets

no code implementations4 Aug 2019 Yawei Zhao, En Zhu, Xinwang Liu, Chang Tang, Deke Guo, Jianping Yin

Specifically, we propose a new variant of the alternating direction method of multipliers (ADMM) to solve this problem efficiently.

Clustering regression

DeFusionNET: Defocus Blur Detection via Recurrently Fusing and Refining Multi-Scale Deep Features

no code implementations CVPR 2019 Chang Tang, Xinzhong Zhu, Xinwang Liu, Lizhe Wang, Albert Zomaya

After that, the fused shallow features are propagated to top layers for refining the fine details of detected defocus blur regions, and the fused semantic features are propagated to bottom layers to assist in better locating the defocus regions.

Defocus Blur Detection Defocus Estimation

Depth Pooling Based Large-scale 3D Action Recognition with Convolutional Neural Networks

no code implementations17 Mar 2018 Pichao Wang, Wanqing Li, Zhimin Gao, Chang Tang, Philip Ogunbona

This paper proposes three simple, compact yet effective representations of depth sequences, referred to respectively as Dynamic Depth Images (DDI), Dynamic Depth Normal Images (DDNI) and Dynamic Depth Motion Normal Images (DDMNI), for both isolated and continuous action recognition.

3D Action Recognition Gesture Recognition

Scene Flow to Action Map: A New Representation for RGB-D based Action Recognition with Convolutional Neural Networks

no code implementations CVPR 2017 Pichao Wang, Wanqing Li, Zhimin Gao, Yuyao Zhang, Chang Tang, Philip Ogunbona

Based on the scene flow vectors, we propose a new representation, namely, Scene Flow to Action Map (SFAM), that describes several long term spatio-temporal dynamics for action recognition.

3D Action Recognition

Large-scale Isolated Gesture Recognition Using Convolutional Neural Networks

no code implementations7 Jan 2017 Pichao Wang, Wanqing Li, Song Liu, Zhimin Gao, Chang Tang, Philip Ogunbona

This paper proposes three simple, compact yet effective representations of depth sequences, referred to respectively as Dynamic Depth Images (DDI), Dynamic Depth Normal Images (DDNI) and Dynamic Depth Motion Normal Images (DDMNI).

General Classification Gesture Recognition

RGB-D-based Action Recognition Datasets: A Survey

no code implementations21 Jan 2016 Jing Zhang, Wanqing Li, Philip O. Ogunbona, Pichao Wang, Chang Tang

Human action recognition from RGB-D (Red, Green, Blue and Depth) data has attracted increasing attention since the first work reported in 2010.

Action Recognition Temporal Action Localization

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

Online Action Recognition based on Incremental Learning of Weighted Covariance Descriptors

no code implementations10 Nov 2015 Chang Tang, Pichao Wang, Wanqing Li

This paper presents a fast yet effective method to recognize actions from stream of noisy skeleton data, and a novel weighted covariance descriptor is adopted to accumulate evidence.

Action Recognition Incremental Learning +1

Deep Convolutional Neural Networks for Action Recognition Using Depth Map Sequences

no code implementations20 Jan 2015 Pichao Wang, Wanqing Li, Zhimin Gao, Jing Zhang, Chang Tang, Philip Ogunbona

The results show that our approach can achieve state-of-the-art results on the individual datasets and without dramatical performance degradation on the Combined Dataset.

Action Recognition Temporal Action Localization

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