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Generalized Category Discovery (GCD) aims to recognize both known and novel categories from a set of unlabeled data, based on another dataset labeled with only known categories. Without considering differences between known and novel…

计算与语言 · 计算机科学 2023-03-16 Wenbin An , Feng Tian , Qinghua Zheng , Wei Ding , QianYing Wang , Ping Chen

Although existing semi-supervised learning models achieve remarkable success in learning with unannotated in-distribution data, they mostly fail to learn on unlabeled data sampled from novel semantic classes due to their closed-set…

计算机视觉与模式识别 · 计算机科学 2023-03-28 Sheng Zhang , Salman Khan , Zhiqiang Shen , Muzammal Naseer , Guangyi Chen , Fahad Khan

Generalized category discovery (GCD) is a recently proposed open-world problem, which aims to automatically cluster partially labeled data. The main challenge is that the unlabeled data contain instances that are not only from known…

计算机视觉与模式识别 · 计算机科学 2023-03-31 Nan Pu , Zhun Zhong , Nicu Sebe

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…

计算机视觉与模式识别 · 计算机科学 2024-12-06 Haiyang Zheng , Nan Pu , Wenjing Li , Nicu Sebe , Zhun Zhong

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…

计算机视觉与模式识别 · 计算机科学 2026-03-23 Jizhou Han , Chenhao Ding , Yuhang He , Qiang Wang , Shaokun Wang , SongLin Dong , Yihong Gong

This paper introduces a novel approach to Generalized Category Discovery (GCD) by leveraging the concept of contextuality to enhance the identification and classification of categories in unlabeled datasets. Drawing inspiration from human…

计算机视觉与模式识别 · 计算机科学 2024-07-30 Tingzhang Luo , Mingxuan Du , Jiatao Shi , Xinxiang Chen , Bingchen Zhao , Shaoguang Huang

Generalized Category Discovery (GCD) tackles the challenging problem of categorizing unlabeled images into both known and novel classes within a partially labeled dataset, without prior knowledge of the number of unknown categories.…

计算机视觉与模式识别 · 计算机科学 2025-07-03 Mingfu Yan , Jiancheng Huang , Yifan Liu , Shifeng Chen

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…

计算机视觉与模式识别 · 计算机科学 2026-02-20 Lorenzo Caselli , Marco Mistretta , Simone Magistri , Andrew D. Bagdanov

In novel class discovery (NCD), we are given labeled data from seen classes and unlabeled data from unseen classes, and we train clustering models for the unseen classes. However, the implicit assumptions behind NCD are still unclear. In…

机器学习 · 计算机科学 2022-09-09 Haoang Chi , Feng Liu , Bo Han , Wenjing Yang , Long Lan , Tongliang Liu , Gang Niu , Mingyuan Zhou , Masashi Sugiyama

In this paper, we consider a real-world scenario where a model that is trained on pre-defined classes continually encounters unlabeled data that contains both known and novel classes. The goal is to continually discover novel classes while…

计算机视觉与模式识别 · 计算机科学 2023-10-19 Yanan Wu , Zhixiang Chi , Yang Wang , Songhe Feng

This paper explores a novel setting called Generalized Category Discovery in Semantic Segmentation (GCDSS), aiming to segment unlabeled images given prior knowledge from a labeled set of base classes. The unlabeled images contain pixels of…

计算机视觉与模式识别 · 计算机科学 2023-11-21 Zhengyuan Peng , Qijian Tian , Jianqing Xu , Yizhang Jin , Xuequan Lu , Xin Tan , Yuan Xie , Lizhuang Ma

In Generalized Category Discovery (GCD), we cluster unlabeled samples of known and novel classes, leveraging a training dataset of known classes. A salient challenge arises due to domain shifts between these datasets. To address this, we…

计算机视觉与模式识别 · 计算机科学 2024-04-09 Sai Bhargav Rongali , Sarthak Mehrotra , Ankit Jha , Mohamad Hassan N C , Shirsha Bose , Tanisha Gupta , Mainak Singha , Biplab Banerjee

In open-world scenarios, Generalized Category Discovery (GCD) requires identifying both known and novel categories within unlabeled data. However, existing methods often suffer from prototype confusion caused by shortcut learning, which…

计算机视觉与模式识别 · 计算机科学 2025-12-01 Kailin Lyu , Jianwei He , Long Xiao , Jianing Zeng , Liang Fan , Lin Shu , Jie Hao

Generalized category discovery (GCD) aims at addressing a more realistic and challenging setting of semi-supervised learning, where only part of the category labels are assigned to certain training samples. Previous methods generally employ…

计算机视觉与模式识别 · 计算机科学 2024-02-02 Yuanpeng Tu , Zhun Zhong , Yuxi Li , Hengshuang Zhao

Generalized Category Discovery (GCD) aims to leverage labeled samples from known categories to cluster unlabeled data that may include both known and unknown categories. While existing methods have achieved impressive results under standard…

计算机视觉与模式识别 · 计算机科学 2025-11-04 Wei Feng , Zongyuan Ge

Generalized Category Discovery (GCD) aims to identify both known and novel categories within unlabeled data by leveraging a set of labeled examples from known categories. Existing GCD methods primarily depend on semantic labels and global…

计算机视觉与模式识别 · 计算机科学 2026-05-22 Fernando Julio Cendra , Kai Han

Generalized class discovery (GCD) aims to infer known and unknown categories in an unlabeled dataset leveraging prior knowledge of a labeled set comprising known classes. Existing research implicitly/explicitly assumes that the frequency of…

计算机视觉与模式识别 · 计算机科学 2024-01-12 Ziyun Li , Ben Dai , Furkan Simsek , Christoph Meinel , Haojin Yang

Continual Generalized Category Discovery (C-GCD) faces a critical challenge: incrementally learning new classes from unlabeled data streams while preserving knowledge of old classes. Existing methods struggle with catastrophic forgetting,…

机器学习 · 计算机科学 2025-07-24 Hao Dai , Jagmohan Chauhan

In this study, we tackle Generalized Category Discovery (GCD) via a Relational Retrieval perspective, explicitly coupling labeled and unlabeled data through bidirectional knowledge transfer. While existing methods treat these sources…

计算机视觉与模式识别 · 计算机科学 2026-05-12 Yulin Xu , Chunqi Guo , Yuanzhen Shuai , Jianyuan Ni

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…

计算机视觉与模式识别 · 计算机科学 2025-09-30 Xianlu Li , Nicolas Nadisic , Shaoguang Huang , Aleksandra Pizurica