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In this paper, we tackle the problem of novel visual category discovery, i.e., grouping unlabelled images from new classes into different semantic partitions by leveraging a labelled dataset that contains images from other different but…

Computer Vision and Pattern Recognition · Computer Science 2022-01-04 Bingchen Zhao , Kai Han

Anomaly detection is a crucial task in various domains. Most of the existing methods assume the normal sample data clusters around a single central prototype while the real data may consist of multiple categories or subgroups. In addition,…

Machine Learning · Statistics 2024-12-03 Zhijin Dong , Hongzhi Liu , Boyuan Ren , Weimin Xiong , Zhonghai Wu

General change detection (GCD) and semantic change detection (SCD) are common methods for identifying changes and distinguishing object categories involved in those changes, respectively. However, the binary changes provided by GCD is often…

Computer Vision and Pattern Recognition · Computer Science 2023-03-09 Yuqun Yang , Xu Tang , Xiangrong Zhang , Jingjing Ma , Licheng Jiao

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

This work generalizes the problem of unsupervised domain generalization to the case in which no labeled samples are available (completely unsupervised). We are given unlabeled samples from multiple source domains, and we aim to learn a…

Machine Learning · Computer Science 2024-02-01 Amit Rozner , Barak Battash , Lior Wolf , Ofir Lindenbaum

Semi-supervised learning is a model training method that uses both labeled and unlabeled data. This paper proposes a fully Bayes semi-supervised learning algorithm that can be applied to any multi-category classification problem. We assume…

Machine Learning · Statistics 2024-07-22 Rui Zhu , Shuvrarghya Ghosh , Subhashis Ghosal

Machine-vision-based defect classification techniques have been widely adopted for automatic quality inspection in manufacturing processes. This article describes a general framework for classifying defects from high volume data batches…

Computer Vision and Pattern Recognition · Computer Science 2023-07-04 Wenbo Sun , Raed Al Kontar , Judy Jin , Tzyy-Shuh Chang

Generalized Continual Category Discovery (GCCD) tackles learning from sequentially arriving, partially labeled datasets while uncovering new categories. Traditional methods depend on feature distillation to prevent forgetting the old…

Machine Learning · Computer Science 2024-07-26 Grzegorz Rypeść , Daniel Marczak , Sebastian Cygert , Tomasz Trzciński , Bartłomiej Twardowski

In this paper, we address the problem of novel class discovery (NCD), which aims to cluster novel classes by leveraging knowledge from disjoint known classes. While recent advances have made significant progress in this area, existing NCD…

Computer Vision and Pattern Recognition · Computer Science 2025-07-17 Xinhang Wan , Jiyuan Liu , Qian Qu , Suyuan Liu , Chuyu Zhang , Fangdi Wang , Xinwang Liu , En Zhu , Kunlun He

The goal of domain generalization is to learn from multiple source domains to generalize to unseen target domains under distribution discrepancy. Current state-of-the-art methods in this area are fully supervised, but for many real-world…

Machine Learning · Computer Science 2020-10-01 Hossein Sharifi-Noghabi , Hossein Asghari , Nazanin Mehrasa , Martin Ester

Many applications of classification methods not only require high accuracy but also reliable estimation of predictive uncertainty. However, while many current classification frameworks, in particular deep neural networks, achieve high…

Machine Learning · Computer Science 2020-02-28 Jonathan Wenger , Hedvig Kjellström , Rudolph Triebel

This article introduces a novel nonparametric methodology for Generalized Linear Models which combines the strengths of the binary regression and latent variable formulations for categorical data, while overcoming their disadvantages.…

Machine Learning · Statistics 2021-10-12 K. P. Chowdhury

Recent advancements have shown promise in applying traditional Semi-Supervised Learning strategies to the task of Generalized Category Discovery (GCD). Typically, this involves a teacher-student framework in which the teacher imparts…

Computer Vision and Pattern Recognition · Computer Science 2024-10-28 Haonan Lin , Wenbin An , Jiahao Wang , Yan Chen , Feng Tian , Mengmeng Wang , Guang Dai , Qianying Wang , Jingdong Wang

Generalized Class Discovery (GCD) clusters base and novel classes in a target domain using supervision from a source domain with only base classes. Current methods often falter with distribution shifts and typically require access to target…

Computer Vision and Pattern Recognition · Computer Science 2025-03-24 Vaibhav Rathore , Shubhranil B , Saikat Dutta , Sarthak Mehrotra , Zsolt Kira , Biplab Banerjee

We tackle the problem of discovering novel classes in an image collection given labelled examples of other classes. This setting is similar to semi-supervised learning, but significantly harder because there are no labelled examples for the…

Computer Vision and Pattern Recognition · Computer Science 2020-02-14 Kai Han , Sylvestre-Alvise Rebuffi , Sebastien Ehrhardt , Andrea Vedaldi , Andrew Zisserman

Dynamic graph anomaly detection (DGAD) is critical for many real-world applications but remains challenging due to the scarcity of labeled anomalies. Existing methods are either unsupervised or semi-supervised: unsupervised methods avoid…

Machine Learning · Computer Science 2026-02-24 Yuxing Tian , Yiyan Qi , Fengran Mo , Weixu Zhang , Jian Guo , Jian-Yun Nie

Learning a parametric model from a given dataset indeed enables to capture intrinsic dependencies between random variables via a parametric conditional probability distribution and in turn predict the value of a label variable given…

Machine Learning · Statistics 2024-06-14 Elouan Argouarc'h , François Desbouvries , Eric Barat , Eiji Kawasaki

Generalized Category Discovery (GCD) is an emerging and challenging open-world problem that has garnered increasing attention in recent years. Most existing GCD methods focus on discovering categories in static images. However, relying…

Computer Vision and Pattern Recognition · Computer Science 2025-09-09 Zhang Jing , Pu Nan , Xie Yu Xiang , Guo Yanming , Lu Qianqi , Zou Shiwei , Yan Jie , Chen Yan

Although deep neural networks are effective on supervised learning tasks, they have been shown to be brittle. They are prone to overfitting on their training distribution and are easily fooled by small adversarial perturbations. In this…

Machine Learning · Computer Science 2020-10-07 Laëtitia Shao , Yang Song , Stefano Ermon

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
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