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Generalized Category Discovery (GCD) aims to classify instances from both known and novel categories within a large-scale unlabeled dataset, a critical yet challenging task for real-world, open-world applications. However, existing methods…

Computer Vision and Pattern Recognition · Computer Science 2026-01-16 Wenwen Liao , Hang Ruan , Jianbo Yu , Yuansong Wang , Qingchao Jiang , Xiaofeng Yang

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…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Kailin Lyu , Jianwei He , Long Xiao , Jianing Zeng , Liang Fan , Lin Shu , Jie Hao

Humans effortlessly identify objects by leveraging a rich understanding of the surrounding scene, including spatial relationships, material properties, and the co-occurrence of other objects. In contrast, most computational object…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Ciprian Constantinescu , Marius Leordeanu

In this paper we tackle the problem of Generalized Category Discovery (GCD). Specifically, given a dataset with labelled and unlabelled images, the task is to cluster all images in the unlabelled subset, whether or not they belong to the…

Computer Vision and Pattern Recognition · Computer Science 2023-11-29 Sagar Vaze , Andrea Vedaldi , Andrew Zisserman

This paper investigates a general framework to discover categories of unlabeled scene images according to their appearances (i.e., textures and structures). We jointly solve the two coupled tasks in an unsupervised manner: (i) classifying…

Computer Vision and Pattern Recognition · Computer Science 2015-02-03 Liang Lin , Ruimao Zhang , Xiaohua Duan

This paper investigates the problem of Generalized Category Discovery (GCD). Given a partially labelled dataset, GCD aims to categorize all unlabelled images, regardless of whether they belong to known or unknown classes. Existing…

Computer Vision and Pattern Recognition · Computer Science 2025-10-22 Zhenqi He , Yuanpei Liu , Kai Han

Generalized Category Discovery (GCD) faces the challenge of categorizing unlabeled data containing both known and novel classes, given only labels for known classes. Previous studies often treat each class independently, neglecting the…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Fang Zhou , Zhiqiang Chen , Martin Pavlovski , Yizhong Zhang

Generalized Category Discovery (GCD) aims to classify unlabelled images from both `seen' and `unseen' classes by transferring knowledge from a set of labelled `seen' class images. A key theme in existing GCD approaches is adapting…

Computer Vision and Pattern Recognition · Computer Science 2025-03-20 Hongjun Wang , Sagar Vaze , Kai Han

Whilst contrastive learning yields powerful representations by matching different augmented views of the same instance, it lacks the ability to capture the similarities between different instances. One popular way to address this limitation…

Computer Vision and Pattern Recognition · Computer Science 2023-09-04 Zheng Gao , Chen Feng , Ioannis Patras

Generalized Category Discovery (GCD) aims to classify test-time samples into either seen categories** -- available during training -- or novel ones, without relying on label supervision. Most existing GCD methods assume simultaneous access…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 Vaibhav Rathore , Divyam Gupta , Biplab Banerjee

Federated Graph Learning (FGL) enables collaborative learning over distributed graph data, yet existing approaches largely rely on a closed-world assumption, limiting their applicability in dynamic environments where novel categories…

Machine Learning · Computer Science 2026-05-12 Zhongzheng Yuan , Lianshuai Guo , Xunkai Li , Wenyu Wang , Meixia Qu

Novel Class Discovery (NCD) is a growing field where we are given during training a labeled set of known classes and an unlabeled set of different classes that must be discovered. In recent years, many methods have been proposed to address…

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…

Machine Learning · Computer Science 2022-09-09 Haoang Chi , Feng Liu , Bo Han , Wenjing Yang , Long Lan , Tongliang Liu , Gang Niu , Mingyuan Zhou , Masashi Sugiyama

Whilst contrastive learning has recently brought notable benefits to deep clustering of unlabelled images by learning sample-specific discriminative visual features, its potential for explicitly inferring class decision boundaries is less…

Computer Vision and Pattern Recognition · Computer Science 2022-11-22 Jiabo Huang , Shaogang Gong

Recent advances in deep learning have significantly improved the performance of various computer vision applications. However, discovering novel categories in an incremental learning scenario remains a challenging problem due to the lack of…

Computer Vision and Pattern Recognition · Computer Science 2023-11-03 Hyungmin Kim , Sungho Suh , Daehwan Kim , Daun Jeong , Hansang Cho , Junmo Kim

We introduce a new notion, that of a contextuality profile of a system of random variables. Rather than characterizing a system's contextuality by a single number, its overall degree of contextuality, we show how it can be characterized by…

Quantum Physics · Physics 2026-05-04 Ehtibar N. Dzhafarov , Victor H. Cervantes

We study the new task of class-incremental Novel Class Discovery (class-iNCD), which refers to the problem of discovering novel categories in an unlabelled data set by leveraging a pre-trained model that has been trained on a labelled data…

Computer Vision and Pattern Recognition · Computer Science 2022-07-19 Subhankar Roy , Mingxuan Liu , Zhun Zhong , Nicu Sebe , Elisa Ricci

Various contextual information has been employed by many approaches for visual detection tasks. However, most of the existing approaches only focus on specific context for specific tasks. In this paper, GMC, a general framework is proposed…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Xuan Wang , Hao Tang , Zhigang Zhu

In this paper, we propose a general framework for image classification using the attention mechanism and global context, which could incorporate with various network architectures to improve their performance. To investigate the capability…

Computer Vision and Pattern Recognition · Computer Science 2022-06-08 Keke Tang , Guodong Wei , Runnan Chen , Jie Zhu , Zhaoquan Gu , Wenping Wang

Contextualized embeddings use unsupervised language model pretraining to compute word representations depending on their context. This is intuitively useful for generalization, especially in Named-Entity Recognition where it is crucial to…

Computation and Language · Computer Science 2020-01-23 Bruno Taillé , Vincent Guigue , Patrick Gallinari