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State-of-the-art pre-trained image models predominantly adopt a two-stage approach: initial unsupervised pre-training on large-scale datasets followed by task-specific fine-tuning using Cross-Entropy loss~(CE). However, it has been…

Computer Vision and Pattern Recognition · Computer Science 2024-11-18 Zijun Long , George Killick , Lipeng Zhuang , Gerardo Aragon-Camarasa , Zaiqiao Meng , Richard Mccreadie

Self-supervised learning (SSL) has gained remarkable success, for which contrastive learning (CL) plays a key role. However, the recent development of new non-CL frameworks has achieved comparable or better performance with high improvement…

Computer Vision and Pattern Recognition · Computer Science 2023-09-22 Thanh Nguyen , Trung Pham , Chaoning Zhang , Tung Luu , Thang Vu , Chang D. Yoo

The electrocardiogram (ECG) is a key diagnostic tool in cardiovascular health. Single-lead ECG recording is integrated into both clinical-grade and consumer wearables. While self-supervised pretraining of foundation models on unlabeled ECGs…

Machine Learning · Computer Science 2025-12-03 Yuxuan Shu , Peter H. Charlton , Fahim Kawsar , Jussi Hernesniemi , Mohammad Malekzadeh

Inspired by the success of contrastive learning (CL) in computer vision and natural language processing, graph contrastive learning (GCL) has been developed to learn discriminative node representations on graph datasets. However, the…

Machine Learning · Computer Science 2023-01-03 Zehong Wang , Qi Li , Donghua Yu , Xiaolong Han , Xiao-Zhi Gao , Shigen Shen

The success of deep learning heavily depends on the availability of large labeled training sets. However, it is hard to get large labeled datasets in medical image domain because of the strict privacy concern and costly labeling efforts.…

Computer Vision and Pattern Recognition · Computer Science 2021-09-30 Dewen Zeng , Yawen Wu , Xinrong Hu , Xiaowei Xu , Haiyun Yuan , Meiping Huang , Jian Zhuang , Jingtong Hu , Yiyu Shi

Deep neural networks, despite their remarkable success, remain fundamentally limited in their ability to perform Continual Learning (CL). While most current methods aim to enhance the capabilities of a single model, Inspired by the…

Machine Learning · Computer Science 2025-08-01 Aojun Lu , Junchao Ke , Chunhui Ding , Jiahao Fan , Jiancheng Lv , Yanan Sun

Semi-Supervised Learning (SSL) has achieved great success in overcoming the difficulties of labeling and making full use of unlabeled data. However, SSL has a limited assumption that the numbers of samples in different classes are balanced,…

Machine Learning · Computer Science 2020-02-18 Minsung Hyun , Jisoo Jeong , Nojun Kwak

Image captioning, a popular topic in computer vision, has achieved substantial progress in recent years. However, the distinctiveness of natural descriptions is often overlooked in previous work. It is closely related to the quality of…

Computer Vision and Pattern Recognition · Computer Science 2017-10-10 Bo Dai , Dahua Lin

Multi-label image classification presents a challenging task in many domains, including computer vision and medical imaging. Recent advancements have introduced graph-based and transformer-based methods to improve performance and capture…

Computer Vision and Pattern Recognition · Computer Science 2024-04-15 Ahmad Sajedi , Samir Khaki , Yuri A. Lawryshyn , Konstantinos N. Plataniotis

Despite its empirical success, the theoretical foundations of self-supervised contrastive learning (CL) are not yet fully established. In this work, we address this gap by showing that standard CL objectives implicitly approximate a…

Machine Learning · Computer Science 2025-11-12 Achleshwar Luthra , Tianbao Yang , Tomer Galanti

Previous contrastive learning methods for sentence representations often focus on insensitive transformations to produce positive pairs, but neglect the role of sensitive transformations that are harmful to semantic representations.…

Computation and Language · Computer Science 2023-03-10 Jie Liu , Yixuan Liu , Xue Han , Chao Deng , Junlan Feng

In object re-identification (ReID), the development of deep learning techniques often involves model updates and deployment. It is unbearable to re-embedding and re-index with the system suspended when deploying new models. Therefore,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 Shengsen Wu , Liang Chen , Yihang Lou , Yan Bai , Tao Bai , Minghua Deng , Lingyu Duan

Low-light image enhancement (LLE) remains challenging due to the unfavorable prevailing low-contrast and weak-visibility problems of single RGB images. In this paper, we respond to the intriguing learning-related question -- if leveraging…

Computer Vision and Pattern Recognition · Computer Science 2021-12-14 Dong Liang , Ling Li , Mingqiang Wei , Shuo Yang , Liyan Zhang , Wenhan Yang , Yun Du , Huiyu Zhou

Human attribute analysis is a challenging task in the field of computer vision, since the data is largely imbalance-distributed. Common techniques such as re-sampling and cost-sensitive learning require prior-knowledge to train the system.…

Computer Vision and Pattern Recognition · Computer Science 2019-08-16 Yiru Wang , Weihao Gan , Jie Yang , Wei Wu , Junjie Yan

Hierarchical classification is a crucial task in many applications, where objects are organized into multiple levels of categories. However, conventional classification approaches often neglect inherent inter-class relationships at…

Computer Vision and Pattern Recognition · Computer Science 2025-10-02 Julius Ott , Nastassia Vysotskaya , Huawei Sun , Lorenzo Servadei , Robert Wille

Graph Contrastive Learning (GCL) has recently emerged as a promising graph self-supervised learning framework for learning discriminative node representations without labels. The widely adopted objective function of GCL benefits from two…

Machine Learning · Computer Science 2024-11-05 Yunhui Liu , Tieke He , Tao Zheng , Jianhua Zhao

Graph contrastive learning (GCL) has been widely used as an effective self-supervised learning method for graph representation learning. However, how to apply adequate and stable graph augmentation to generating proper views for contrastive…

Machine Learning · Computer Science 2025-01-09 Yanchen Xu , Siqi Huang , Hongyuan Zhang , Xuelong Li

By treating users' interactions as a user-item graph, graph learning models have been widely deployed in Collaborative Filtering(CF) based recommendation. Recently, researchers have introduced Graph Contrastive Learning(GCL) techniques into…

Information Retrieval · Computer Science 2023-07-12 Yonghui Yang , Zhengwei Wu , Le Wu , Kun Zhang , Richang Hong , Zhiqiang Zhang , Jun Zhou , Meng Wang

Graph Contrastive Learning (GCL) establishes a new paradigm for learning graph representations without human annotations. Although remarkable progress has been witnessed recently, the success behind GCL is still left somewhat mysterious. In…

Machine Learning · Computer Science 2021-10-27 Yanqiao Zhu , Yichen Xu , Qiang Liu , Shu Wu

Graph Contrastive Learning (GCL) has shown strong promise for unsupervised graph representation learning, yet its effectiveness on heterophilic graphs, where connected nodes often belong to different classes, remains limited. Most existing…

Machine Learning · Computer Science 2026-05-12 Yanan Zhao , Feng Ji , Jingyang Dai , Jiaze Ma , Wee Peng Tay