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Generalized category discovery (GCD) is a pragmatic but underexplored problem, which requires models to automatically cluster and discover novel categories by leveraging the labeled samples from old classes. The challenge is that unlabeled…

Machine Learning · Computer Science 2025-04-08 Shijie Ma , Fei Zhu , Xu-Yao Zhang , Cheng-Lin Liu

Generalized Category Discovery (GCD) aims to identify novel categories in unlabeled data while leveraging a small labeled subset of known classes. Training a parametric classifier solely on image features often leads to overfitting to old…

Computer Vision and Pattern Recognition · Computer Science 2026-02-20 Lorenzo Caselli , Marco Mistretta , Simone Magistri , Andrew D. Bagdanov

Generalized Category Discovery (GCD) aims to identify a mix of known and novel categories within unlabeled data sets, providing a more realistic setting for image recognition. Essentially, GCD needs to remember existing patterns thoroughly…

Computer Vision and Pattern Recognition · Computer Science 2025-03-06 Xinzi Cao , Xiawu Zheng , Guanhong Wang , Weijiang Yu , Yunhang Shen , Ke Li , Yutong Lu , Yonghong Tian

Generalized Category Discovery (GCD) focuses on classifying known categories while simultaneously discovering novel categories from unlabeled data. However, previous GCD methods face challenges due to inconsistent optimization objectives…

Computer Vision and Pattern Recognition · Computer Science 2026-02-05 Jizhou Han , Shaokun Wang , Yuhang He , Chenhao Ding , Qiang Wang , Xinyuan Gao , SongLin Dong , Yihong Gong

We tackle the generalized category discovery (GCD) problem, which aims to discover novel classes in unlabeled datasets by leveraging the knowledge of known classes. Previous works utilize the known class knowledge through shared…

Computer Vision and Pattern Recognition · Computer Science 2025-02-07 Chuyu Zhang , Peiyan Gu , Xueyang Yu , Xuming He

In this paper, we study the problem of Generalized Category Discovery (GCD), which aims to cluster unlabeled data from both known and unknown categories using the knowledge of labeled data from known categories. Current GCD methods rely on…

Computer Vision and Pattern Recognition · Computer Science 2024-12-06 Haiyang Zheng , Nan Pu , Wenjing Li , Nicu Sebe , Zhun Zhong

Generalized category discovery (GCD) is a recently proposed open-world task. Given a set of images consisting of labeled and unlabeled instances, the goal of GCD is to automatically cluster the unlabeled samples using information…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Xiangli Yang , Xinglin Pan , Irwin King , Zenglin Xu

Generalized category discovery~(GCD) seeks to jointly identify both known and novel categories in unlabeled data. While prior works have mainly focused on RGB images, their assumptions and modeling strategies do not generalize well to…

Computer Vision and Pattern Recognition · Computer Science 2025-09-30 Xianlu Li , Nicolas Nadisic , Shaoguang Huang , Aleksandra Pizurica

Generalized Category Discovery (GCD) aims to identify unlabeled samples by leveraging the base knowledge from labeled ones, where the unlabeled set consists of both base and novel classes. Since clustering methods are time-consuming at…

Computer Vision and Pattern Recognition · Computer Science 2025-06-04 Duo Liu , Zhiquan Tan , Linglan Zhao , Zhongqiang Zhang , Xiangzhong Fang , Weiran Huang

Generalized Category Discovery (GCD) is a pragmatic and challenging open-world task, which endeavors to cluster unlabeled samples from both novel and old classes, leveraging some labeled data of old classes. Given that knowledge learned…

Computer Vision and Pattern Recognition · Computer Science 2024-03-08 Shijie Ma , Fei Zhu , Zhun Zhong , Xu-Yao Zhang , Cheng-Lin Liu

A desirable open world recognition (OWR) system requires performing three tasks: (1) Open set recognition (OSR), i.e., classifying the known (classes seen during training) and rejecting the unknown (unseen$/$novel classes) online; (2)…

Computer Vision and Pattern Recognition · Computer Science 2023-08-15 Fulin Gao , Weimin Zhong , Zhixing Cao , Xin Peng , Zhi Li

Generalized Category Discovery (GCD) seeks to identify novel categories from unlabeled data while retaining the classification ability of seen categories. Prior GCD methods commonly leverage transferable representations from pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Bo Ye , Kai Gan , Tong Wei , Min-Ling Zhang

Generalized Category Discovery (GCD) requires a model to both classify known categories and cluster unknown categories in unlabeled data. Prior methods leveraged self-supervised pre-training combined with supervised fine-tuning on the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-18 Rabah Ouldnoughi , Chia-Wen Kuo , Zsolt Kira

Generalized Category Discovery (GCD) aims to categorize unlabelled instances from both known and unknown classes by transferring knowledge from labelled data of known classes. Existing methods assume all data comes from a single domain, yet…

Computer Vision and Pattern Recognition · Computer Science 2026-05-05 Hongjun Wang , Po Hu , Kai Han

Generalized Class Discovery (GCD) aims to dynamically assign labels to unlabelled data partially based on knowledge learned from labelled data, where the unlabelled data may come from known or novel classes. The prevailing approach…

Machine Learning · Computer Science 2024-05-01 Ye Wang , Yaxiong Wang , Yujiao Wu , Bingchen Zhao , Xueming Qian

Generalized Category Discovery (GCD) seeks to uncover novel categories in unlabeled data while preserving recognition of known categories, yet prevailing visual-only pipelines and the loose coupling between supervised learning and discovery…

Computer Vision and Pattern Recognition · Computer Science 2026-03-23 Jizhou Han , Chenhao Ding , Yuhang He , Qiang Wang , Shaokun Wang , SongLin Dong , Yihong Gong

In this paper, we tackle the problem of Generalized Category Discovery (GCD). Given a dataset containing both labelled and unlabelled images, the objective is to categorize all images in the unlabelled subset, irrespective of whether they…

Computer Vision and Pattern Recognition · Computer Science 2025-04-08 Yuanpei Liu , Kai Han

Generalized Category Discovery (GCD) challenges methods to identify known and novel classes using partially labeled data, mirroring human category learning. Unlike prior GCD methods, which operate within a single modality and require…

Computer Vision and Pattern Recognition · Computer Science 2026-04-17 Jordan Shipard , Arnold Wiliem , Kien Nguyen Thanh , Wei Xiang , Clinton Fookes

Different from the traditional semi-supervised learning paradigm that is constrained by the close-world assumption, Generalized Category Discovery (GCD) presumes that the unlabeled dataset contains new categories not appearing in the…

Computer Vision and Pattern Recognition · Computer Science 2025-03-17 Yuxun Qu , Yongqiang Tang , Chenyang Zhang , Wensheng Zhang

Generalized Category Discovery (GCD) is a crucial task that aims to recognize both known and novel categories from a set of unlabeled data by utilizing a few labeled data with only known categories. Due to the lack of supervision and…

Computation and Language · Computer Science 2024-05-28 Wenbin An , Wenkai Shi , Feng Tian , Haonan Lin , QianYing Wang , Yaqiang Wu , Mingxiang Cai , Luyan Wang , Yan Chen , Haiping Zhu , Ping Chen
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