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Self-supervised Learning (SSL) including the mainstream contrastive learning has achieved great success in learning visual representations without data annotations. However, most of methods mainly focus on the instance level information…

Computer Vision and Pattern Recognition · Computer Science 2021-07-26 Mingkai Zheng , Shan You , Fei Wang , Chen Qian , Changshui Zhang , Xiaogang Wang , Chang Xu

Self-supervised learning (SSL) excels at finding general-purpose latent representations from complex data, yet lacks a unifying theoretical framework that explains the diverse existing methods and guides the design of new ones. We cast SSL…

Machine Learning · Computer Science 2026-05-28 Fabian A Mikulasch , Friedemann Zenke

Self-supervised Learning (SSL) including the mainstream contrastive learning has achieved great success in learning visual representations without data annotations. However, most methods mainly focus on the instance level information (\ie,…

Computer Vision and Pattern Recognition · Computer Science 2024-06-04 Mingkai Zheng , Shan You , Fei Wang , Chen Qian , Changshui Zhang , Xiaogang Wang , Chang Xu

This paper considers learning deep features from long-tailed data. We observe that in the deep feature space, the head classes and the tail classes present different distribution patterns. The head classes have a relatively large spatial…

Computer Vision and Pattern Recognition · Computer Science 2020-04-14 Jialun Liu , Yifan Sun , Chuchu Han , Zhaopeng Dou , Wenhui Li

Recent advance of large scale similarity search involves using deeply learned representations to improve the search accuracy and use vector quantization methods to increase the search speed. However, how to learn deep representations that…

Computer Vision and Pattern Recognition · Computer Science 2016-11-01 Shicong Liu , Hongtao Lu

This work addresses the task of self-supervised learning (SSL) on a long-tailed dataset that aims to learn balanced and well-separated representations for downstream tasks such as image classification. This task is crucial because the real…

Computer Vision and Pattern Recognition · Computer Science 2025-06-17 Cuong Manh Hoang , Yeejin Lee , Byeongkeun Kang

Semi-supervised learning (SSL), thanks to the significant reduction of data annotation costs, has been an active research topic for large-scale 3D scene understanding. However, the existing SSL-based methods suffer from severe training…

Computer Vision and Pattern Recognition · Computer Science 2024-01-17 Mengtian Li , Shaohui Lin , Zihan Wang , Yunhang Shen , Baochang Zhang , Lizhuang Ma

In representation learning, uniformity refers to the uniform feature distribution in the latent space (i.e., unit hypersphere). Previous work has shown that improving uniformity contributes to the learning of under-represented classes.…

Machine Learning · Computer Science 2025-03-04 Zijian Dong , Yilei Wu , Chongyao Chen , Yingtian Zou , Yichi Zhang , Juan Helen Zhou

Scene Graph Generation (SGG) as a critical task in image understanding, facing the challenge of head-biased prediction caused by the long-tail distribution of predicates. However, current unbiased SGG methods can easily prioritize improving…

Computer Vision and Pattern Recognition · Computer Science 2023-08-24 Lei Wang , Zejian Yuan , Yao Lu , Badong Chen

Graph representation learning has emerged as a cornerstone for tasks like node classification and link prediction, yet prevailing self-supervised learning (SSL) methods face challenges such as computational inefficiency, reliance on…

Machine Learning · Computer Science 2025-09-04 Srinitish Srinivasan , Omkumar CU

The cost of head pose labeling is the main challenge of improving the fine-grained Head Pose Estimation (HPE). Although Self-Supervised Learning (SSL) can be a solution to the lack of huge amounts of labeled data, its efficacy for…

Computer Vision and Pattern Recognition · Computer Science 2022-08-02 Mahdi Pourmirzaei , Farzaneh Esmaili , Ebrahim Mousavi , Sasan Karamizadeh , Seyedehsamaneh Shojaeilangari

Graph Representation Learning (GRL) is a fundamental task in machine learning, aiming to encode high-dimensional graph-structured data into low-dimensional vectors. Self-Supervised Learning (SSL) methods are widely used in GRL because they…

Machine Learning · Computer Science 2025-06-13 Shifeng Xie , Aref Einizade , Jhony H. Giraldo

With the progress of sensor technology in wearables, the collection and analysis of PPG signals are gaining more interest. Using Machine Learning, the cardiac rhythm corresponding to PPG signals can be used to predict different tasks such…

Signal Processing · Electrical Eng. & Systems 2022-12-20 Ramin Ghorbani , Marcel J. T. Reinders , David M. J. Tax

Self-supervised learning (SSL) methods have achieved remarkable success in learning image representations allowing invariances in them - but therefore discarding transformation information that some computer vision tasks actually require.…

Computer Vision and Pattern Recognition · Computer Science 2026-02-11 Qin Wang , Alessio Quercia , Benjamin Bruns , Abigail Morrison , Hanno Scharr , Kai Krajsek

Incorporating heterogeneous representations from different architectures has facilitated various vision tasks, e.g., some hybrid networks combine transformers and convolutions. However, complementarity between such heterogeneous…

Computer Vision and Pattern Recognition · Computer Science 2025-10-15 Zhong-Yu Li , Bo-Wen Yin , Yongxiang Liu , Li Liu , Ming-Ming Cheng

Long-tailed recognition with imbalanced class distribution naturally emerges in practical machine learning applications. Existing methods such as data reweighing, resampling, and supervised contrastive learning enforce the class balance…

Computer Vision and Pattern Recognition · Computer Science 2023-09-12 Chengkai Hou , Jieyu Zhang , Haonan Wang , Tianyi Zhou

In real-world data, long-tailed data distribution is common, making it challenging for models trained on empirical risk minimisation to learn and classify tail classes effectively. While many studies have sought to improve long tail…

Computer Vision and Pattern Recognition · Computer Science 2025-01-24 Ziheng Wang , Toni Lassila , Sharib Ali

Long-tailed semi-supervised learning poses a significant challenge in training models with limited labeled data exhibiting a long-tailed label distribution. Current state-of-the-art LTSSL approaches heavily rely on high-quality…

Machine Learning · Computer Science 2024-10-10 Zi-Hao Zhou , Siyuan Fang , Zi-Jing Zhou , Tong Wei , Yuanyu Wan , Min-Ling Zhang

Generalized Category Discovery (GCD) utilizes labeled samples of known classes to discover novel classes in unlabeled samples. Existing methods show effective performance on artificial datasets with balanced distributions. However,…

Artificial Intelligence · Computer Science 2025-07-31 Cuong Manh Hoang

Despite the empirical successes of self-supervised learning (SSL) methods, it is unclear what characteristics of their representations lead to high downstream accuracies. In this work, we characterize properties that SSL representations…

Machine Learning · Computer Science 2022-12-13 Yann Dubois , Tatsunori Hashimoto , Stefano Ermon , Percy Liang