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Semi-supervised object detection (SSOD) based on pseudo-labeling significantly reduces dependence on large labeled datasets by effectively leveraging both labeled and unlabeled data. However, real-world applications of SSOD often face…

Computer Vision and Pattern Recognition · Computer Science 2025-03-25 Moussa Kassem Sbeyti , Nadja Klein , Azarm Nowzad , Fikret Sivrikaya , Sahin Albayrak

Open-World Object Detection (OWOD) extends object detection problem to a realistic and dynamic scenario, where a detection model is required to be capable of detecting both known and unknown objects and incrementally learning newly…

Computer Vision and Pattern Recognition · Computer Science 2023-09-01 Ruohuan Fang , Guansong Pang , Lei Zhou , Xiao Bai , Jin Zheng

This study delves into semi-supervised object detection (SSOD) to improve detector performance with additional unlabeled data. State-of-the-art SSOD performance has been achieved recently by self-training, in which training supervision…

Computer Vision and Pattern Recognition · Computer Science 2021-07-13 Fangyuan Zhang , Tianxiang Pan , Bin Wang

Semi-supervised learning (semi-SL) is a promising alternative to supervised learning for medical image analysis when obtaining good quality supervision for medical imaging is difficult. However, semi-SL assumes that the underlying…

Computer Vision and Pattern Recognition · Computer Science 2023-03-20 Nikhil Cherian Kurian , Varsha S , Abhijit Patil , Shashikant Khade , Amit Sethi

In this paper, we address a complex but practical scenario in semi-supervised learning (SSL) named open-set SSL, where unlabeled data contain both in-distribution (ID) and out-of-distribution (OOD) samples. Unlike previous methods that only…

Computer Vision and Pattern Recognition · Computer Science 2023-07-03 Ganlong Zhao , Guanbin Li , Yipeng Qin , Jinjin Zhang , Zhenhua Chai , Xiaolin Wei , Liang Lin , Yizhou Yu

Conventional open-world object detection (OWOD) problem setting first distinguishes known and unknown classes and then later incrementally learns the unknown objects when introduced with labels in the subsequent tasks. However, the current…

Computer Vision and Pattern Recognition · Computer Science 2024-04-15 Sahal Shaji Mullappilly , Abhishek Singh Gehlot , Rao Muhammad Anwer , Fahad Shahbaz Khan , Hisham Cholakkal

Semi-Supervised Object Detection (SSOD) has achieved resounding success by leveraging unlabeled data to improve detection performance. However, in Open Scene Semi-Supervised Object Detection (O-SSOD), unlabeled data may contains unknown…

Computer Vision and Pattern Recognition · Computer Science 2024-01-04 Jingyu Zhuang , Kuo Wang , Liang Lin , Guanbin Li

We tackle the challenging problem of Open-Set Object Detection (OSOD), which aims to detect both known and unknown objects in unlabelled images. The main difficulty arises from the absence of supervision for these unknown classes, making it…

Computer Vision and Pattern Recognition · Computer Science 2024-12-13 Silin Cheng , Yuanpei Liu , Kai Han

Existing semi-supervised learning (SSL) methods assume that labeled and unlabeled data share the same class space. However, in real-world applications, unlabeled data always contain classes not present in the labeled set, which may cause…

Machine Learning · Computer Science 2024-01-17 Wenjuan Xi , Xin Song , Weili Guo , Yang Yang

Semi-Supervised classification and segmentation methods have been widely investigated in medical image analysis. Both approaches can improve the performance of fully-supervised methods with additional unlabeled data. However, as a…

Computer Vision and Pattern Recognition · Computer Science 2021-06-04 Hong-Yu Zhou , Chengdi Wang , Haofeng Li , Gang Wang , Shu Zhang , Weimin Li , Yizhou Yu

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 anomaly detection is a common problem, as often the datasets containing anomalies are partially labeled. We propose a canonical framework: Semi-supervised Pseudo-labeler Anomaly Detection with Ensembling (SPADE) that isn't…

Machine Learning · Computer Science 2022-12-02 Jinsung Yoon , Kihyuk Sohn , Chun-Liang Li , Sercan O. Arik , Tomas Pfister

Semi-supervised learning (SSL) has attracted much attention since it reduces the expensive costs of collecting adequate well-labeled training data, especially for deep learning methods. However, traditional SSL is built upon an assumption…

Computer Vision and Pattern Recognition · Computer Science 2024-07-03 Lie Ju , Yicheng Wu , Wei Feng , Zhen Yu , Lin Wang , Zhuoting Zhu , Zongyuan Ge

In open-set semi-supervised learning (OSSL), we consider unlabeled datasets that may contain unknown classes. Existing OSSL methods often use the softmax confidence for classifying data as in-distribution (ID) or out-of-distribution (OOD).…

Machine Learning · Computer Science 2026-01-26 Erik Wallin , Lennart Svensson , Fredrik Kahl , Lars Hammarstrand

Open-set Semi-supervised Learning (OSSL) holds a realistic setting that unlabeled data may come from classes unseen in the labeled set, i.e., out-of-distribution (OOD) data, which could cause performance degradation in conventional SSL…

Machine Learning · Computer Science 2024-05-21 Yang Yang , Nan Jiang , Yi Xu , De-Chuan Zhan

Semi-supervised learning (SSL) has made significant strides in the field of remote sensing. Finding a large number of labeled datasets for SSL methods is uncommon, and manually labeling datasets is expensive and time-consuming. Furthermore,…

Computer Vision and Pattern Recognition · Computer Science 2022-12-22 Fahmida Tasnim Lisa , Md. Zarif Hossain , Sharmin Naj Mou , Shahriar Ivan , Md. Hasanul Kabir

The existing continual learning methods are mainly focused on fully-supervised scenarios and are still not able to take advantage of unlabeled data available in the environment. Some recent works tried to investigate semi-supervised…

Medical image classification is a challenging task due to the scarcity of labeled samples and class imbalance caused by the high variance in disease prevalence. Semi-supervised learning (SSL) methods can mitigate these challenges by…

Computer Vision and Pattern Recognition · Computer Science 2023-07-11 Md Junaid Mahmood , Pranaw Raj , Divyansh Agarwal , Suruchi Kumari , Pravendra Singh

A fundamental limitation of applying semi-supervised learning in real-world settings is the assumption that unlabeled test data contains only classes previously encountered in the labeled training data. However, this assumption rarely holds…

Machine Learning · Computer Science 2022-01-27 Kaidi Cao , Maria Brbic , Jure Leskovec

Medical image segmentation has made significant progress when a large amount of labeled data are available. However, annotating medical image segmentation datasets is expensive due to the requirement of professional skills. Additionally,…

Computer Vision and Pattern Recognition · Computer Science 2023-07-25 Tao Wang , Zhongzheng Huang , Jiawei Wu , Yuanzheng Cai , Zuoyong Li