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We present a system for bottom-up cumulative learning of myriad concepts corresponding to meaningful character strings, and their part-related and prediction edges. The learning is self-supervised in that the concepts discovered are used as…

Machine Learning · Computer Science 2021-12-20 Omid Madani

Semantic novelty detection aims at discovering unknown categories in the test data. This task is particularly relevant in safety-critical applications, such as autonomous driving or healthcare, where it is crucial to recognize unknown…

Computer Vision and Pattern Recognition · Computer Science 2022-09-05 Francesco Cappio Borlino , Silvia Bucci , Tatiana Tommasi

We explore the problem of Incremental Generalized Category Discovery (IGCD). This is a challenging category incremental learning setting where the goal is to develop models that can correctly categorize images from previously seen…

Computer Vision and Pattern Recognition · Computer Science 2023-12-11 Bingchen Zhao , Oisin Mac Aodha

Document categorization, which aims to assign a topic label to each document, plays a fundamental role in a wide variety of applications. Despite the success of existing studies in conventional supervised document classification, they are…

Computation and Language · Computer Science 2023-10-24 Yu Zhang , Yu Meng , Jiaxin Huang , Frank F. Xu , Xuan Wang , Jiawei Han

Classification is one of the most popular and widely used supervised learning tasks, which categorizes objects into predefined classes based on known knowledge. Classification has been an important research topic in machine learning and…

Machine Learning · Computer Science 2015-03-13 Jian-Ping Mei , Chee-Keong Kwoh , Peng Yang , Xiao-Li Li

We propose a new fast fully unsupervised method to discover semantic patterns. Our algorithm is able to hierarchically find visual categories and produce a segmentation mask where previous methods fail. Through the modeling of what is a…

Computer Vision and Pattern Recognition · Computer Science 2021-02-25 Francesco Pelosin , Andrea Gasparetto , Andrea Albarelli , Andrea Torsello

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

We address the problem of generalized category discovery (GCD) in this paper, i.e. clustering the unlabeled images leveraging the information from a set of seen classes, where the unlabeled images could contain both seen classes and unseen…

Computer Vision and Pattern Recognition · Computer Science 2022-08-04 Yixin Fei , Zhongkai Zhao , Siwei Yang , Bingchen Zhao

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) 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

Category discovery methods aim to find novel categories in unlabeled visual data. At training time, a set of labeled and unlabeled images are provided, where the labels correspond to the categories present in the images. The labeled data…

Computer Vision and Pattern Recognition · Computer Science 2024-07-19 Bingchen Zhao , Nico Lang , Serge Belongie , Oisin Mac Aodha

Generalized Category Discovery (GCD) utilizes labeled samples of known classes to discover novel classes in unlabeled samples. Existing methods show effective performance on artificial datasets with balanced distributions. However,…

Artificial Intelligence · Computer Science 2025-07-31 Cuong Manh Hoang

Generalized Category Discovery (GCD) aims to classify unlabeled data containing both seen and novel categories. Although existing methods perform well on generic datasets, they struggle in fine-grained scenarios. We attribute this…

Computer Vision and Pattern Recognition · Computer Science 2025-03-24 Enguang Wang , Zhimao Peng , Zhengyuan Xie , Haori Lu , Fei Yang , Xialei Liu

We present Self-Classifier -- a novel self-supervised end-to-end classification learning approach. Self-Classifier learns labels and representations simultaneously in a single-stage end-to-end manner by optimizing for same-class prediction…

Computer Vision and Pattern Recognition · Computer Science 2022-07-13 Elad Amrani , Leonid Karlinsky , Alex Bronstein

When faced with learning challenging new tasks, humans often follow sequences of steps that allow them to incrementally build up the necessary skills for performing these new tasks. However, in machine learning, models are most often…

Artificial Intelligence · Computer Science 2021-06-09 Otilia Stretcu , Emmanouil Antonios Platanios , Tom M. Mitchell , Barnabás Póczos

Hashing produces compact representations for documents, to perform tasks like classification or retrieval based on these short codes. When hashing is supervised, the codes are trained using labels on the training data. This paper first…

Computer Vision and Pattern Recognition · Computer Science 2017-08-11 Alexandre Sablayrolles , Matthijs Douze , Hervé Jégou , Nicolas Usunier

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

Learning with complete or partial supervision is powerful but relies on ever-growing human annotation efforts. As a way to mitigate this serious problem, as well as to serve specific applications, unsupervised learning has emerged as an…

Computer Vision and Pattern Recognition · Computer Science 2019-04-08 Huy V. Vo , Francis Bach , Minsu Cho , Kai Han , Yann LeCun , Patrick Perez , Jean Ponce

A central problem in business concerns the optimal allocation of limited resources to a set of available tasks, where the payoff of these tasks is inherently uncertain. In credit card fraud detection, for instance, a bank can only assign a…

Machine Learning · Computer Science 2022-02-10 Toon Vanderschueren , Bart Baesens , Tim Verdonck , Wouter Verbeke

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