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Deep Learning heavily depends on large labeled datasets which limits further improvements. While unlabeled data is available in large amounts, in particular in image recognition, it does not fulfill the closed world assumption of…

Machine Learning · Computer Science 2020-12-24 Maximilian Augustin , Matthias Hein

Semi-supervised learning holds great promise for many real-world applications, due to its ability to leverage both unlabeled and expensive labeled data. However, most semi-supervised learning algorithms still heavily rely on the limited…

Machine Learning · Computer Science 2023-12-29 Huiling Qin , Xianyuan Zhan , Yuanxun Li , Yu Zheng

In semi-supervised semantic segmentation, existing studies have shown promising results in academic settings with controlled splits of benchmark datasets. However, the potential benefits of leveraging significantly larger sets of unlabeled…

Computer Vision and Pattern Recognition · Computer Science 2025-09-09 Wooseok Shin , Jisu Kang , Hyeonki Jeong , Jin Sob Kim , Sung Won Han

Semi-Supervised Learning (SSL) has advanced classification tasks by inputting both labeled and unlabeled data to train a model jointly. However, existing SSL methods only consider the unlabeled data whose predictions are beyond a fixed…

Computer Vision and Pattern Recognition · Computer Science 2022-05-24 Zechen Liang , Yuan-Gen Wang , Wei Lu , Xiaochun Cao

Traditional supervised learning aims to train a classifier in the closed-set world, where training and test samples share the same label space. In this paper, we target a more challenging and realistic setting: open-set learning (OSL),…

Machine Learning · Computer Science 2021-07-01 Zhen Fang , Jie Lu , Anjin Liu , Feng Liu , Guangquan Zhang

Deep learning is pushing the state-of-the-art in many computer vision applications. However, it relies on large annotated data repositories, and capturing the unconstrained nature of the real-world data is yet to be solved. Semi-supervised…

Computer Vision and Pattern Recognition · Computer Science 2022-07-29 Mamshad Nayeem Rizve , Navid Kardan , Mubarak Shah

While semi-supervised learning (SSL) has received tremendous attentions in many machine learning tasks due to its successful use of unlabeled data, existing SSL algorithms use either all unlabeled examples or the unlabeled examples with a…

Machine Learning · Computer Science 2021-09-03 Yi Xu , Lei Shang , Jinxing Ye , Qi Qian , Yu-Feng Li , Baigui Sun , Hao Li , Rong Jin

The centrality and diversity of the labeled data are very influential to the performance of semi-supervised learning (SSL), but most SSL models select the labeled data randomly. This study first construct a leading forest that forms a…

Artificial Intelligence · Computer Science 2022-10-11 Ji Xu , Gang Ren , Yao Xiao , Shaobo Li , Guoyin Wang

Though Self-supervised learning (SSL) has been widely studied as a promising technique for representation learning, it doesn't generalize well on long-tailed datasets due to the majority classes dominating the feature space. Recent work…

Computer Vision and Pattern Recognition · Computer Science 2023-07-13 Jianhong Bai , Zuozhu Liu , Hualiang Wang , Jin Hao , Yang Feng , Huanpeng Chu , Haoji Hu

Given an unlabeled dataset and an annotation budget, we study how to selectively label a fixed number of instances so that semi-supervised learning (SSL) on such a partially labeled dataset is most effective. We focus on selecting the right…

Machine Learning · Computer Science 2023-08-24 Xudong Wang , Long Lian , Stella X. Yu

Using unlabeled wild data containing both in-distribution (ID) and out-of-distribution (OOD) data to improve the safety and reliability of models has recently received increasing attention. Existing methods either design customized losses…

Machine Learning · Computer Science 2025-05-20 Chuanxing Geng , Qifei Li , Xinrui Wang , Dong Liang , Songcan Chen , Pong C. Yuen

Open set classification (OSC) tackles the problem of determining whether the data are in-class or out-of-class during inference, when only provided with a set of in-class examples at training time. Traditional OSC methods usually train…

Machine Learning · Computer Science 2020-08-12 Yang Yang , Zhen-Qiang Sun , Hui Xiong , Jian Yang

We investigate omni-supervised learning, a special regime of semi-supervised learning in which the learner exploits all available labeled data plus internet-scale sources of unlabeled data. Omni-supervised learning is lower-bounded by…

Computer Vision and Pattern Recognition · Computer Science 2017-12-13 Ilija Radosavovic , Piotr Dollár , Ross Girshick , Georgia Gkioxari , Kaiming He

The capability of the traditional semi-supervised learning (SSL) methods is far from real-world application due to severely biased pseudo-labels caused by (1) class imbalance and (2) class distribution mismatch between labeled and unlabeled…

Computer Vision and Pattern Recognition · Computer Science 2022-06-03 Youngtaek Oh , Dong-Jin Kim , In So Kweon

Continual learning usually assumes the incoming data are fully labeled, which might not be applicable in real applications. In this work, we consider semi-supervised continual learning (SSCL) that incrementally learns from partially labeled…

Machine Learning · Computer Science 2022-02-15 Liyuan Wang , Kuo Yang , Chongxuan Li , Lanqing Hong , Zhenguo Li , Jun Zhu

Out-of-Distribution (OOD) detection is essential in real-world applications, which has attracted increasing attention in recent years. However, most existing OOD detection methods require many labeled In-Distribution (ID) data, causing a…

Machine Learning · Computer Science 2022-10-14 Yi-Xuan Sun , Wei Wang

Pseudo-label-based semi-supervised learning (SSL) has achieved great success on raw data utilization. However, its training procedure suffers from confirmation bias due to the noise contained in self-generated artificial labels. Moreover,…

Computer Vision and Pattern Recognition · Computer Science 2022-09-12 Fan Yang , Kai Wu , Shuyi Zhang , Guannan Jiang , Yong Liu , Feng Zheng , Wei Zhang , Chengjie Wang , Long Zeng

In open-world semi-supervised learning (OWSSL), a model learns from labeled data and unlabeled data containing both known and novel classes. In practical OWSSL applications, models are expected to perform rigorous classification by directly…

Computer Vision and Pattern Recognition · Computer Science 2026-05-01 Hezhao Liu , Jiacheng Yang , Junlong Gao , Mengke Li , Yiqun Zhang , Shreyank N Gowda , Yang Lu

Semi-Supervised Learning (SSL) with mismatched classes deals with the problem that the classes-of-interests in the limited labeled data is only a subset of the classes in massive unlabeled data. As a result, the classes only possessed by…

Machine Learning · Computer Science 2022-04-13 Zhuo Huang , Ying Tai , Chengjie Wang , Jian Yang , Chen Gong

Semi-supervised Learning (SSL) has been proven vulnerable to out-of-distribution (OOD) samples in realistic large-scale unsupervised datasets due to over-confident pseudo-labeling OODs as in-distribution (ID). A key underlying problem is…

Machine Learning · Computer Science 2023-08-31 Xuwei Tan , Yi-Jie Huang , Yaqian Li