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In this paper we address imbalanced binary classification (IBC) tasks. Applying resampling strategies to balance the class distribution of training instances is a common approach to tackle these problems. Many state-of-the-art methods find…

Machine Learning · Computer Science 2022-05-31 Vitor Cerqueira , Luis Torgo , Paula Branco , Colin Bellinger

With the widespread adoption of deep learning in visual tasks, Class-Incremental Learning (CIL) has become an important paradigm for handling dynamically evolving data distributions. However, CIL faces the core challenge of catastrophic…

Machine Learning · Computer Science 2026-03-04 Jinge Ma , Fengqing Zhu

In continual learning, there is a serious problem of catastrophic forgetting, in which previous knowledge is forgotten when a model learns new tasks. Various methods have been proposed to solve this problem. Replay methods which replay data…

Computer Vision and Pattern Recognition · Computer Science 2024-09-18 Kotaro Nagata , Hiromu Ono , Kazuhiro Hotta

Deep neural networks suffer from catastrophic forgetting when continually learning new concepts. In this paper, we analyze this problem from a data imbalance point of view. We argue that the imbalance between old task and new task data…

Computer Vision and Pattern Recognition · Computer Science 2024-05-27 Leyuan Wang , Liuyu Xiang , Yunlong Wang , Huijia Wu , Zhaofeng He

Multi-task learning (MTL) is a novel framework to learn several tasks simultaneously with a single shared network where each task has its distinct personalized header network for fine-tuning. MTL can be implemented in federated learning…

Machine Learning · Computer Science 2022-03-28 Matin Mortaheb , Cemil Vahapoglu , Sennur Ulukus

In Continual learning (CL) balancing effective adaptation while combating catastrophic forgetting is a central challenge. Many of the recent best-performing methods utilize various forms of prior task data, e.g. a replay buffer, to tackle…

Machine Learning · Computer Science 2023-06-07 Nader Asadi , MohammadReza Davari , Sudhir Mudur , Rahaf Aljundi , Eugene Belilovsky

Modern machine learning systems need to be able to cope with constantly arriving and changing data. Two main areas of research dealing with such scenarios are continual learning and data stream mining. Continual learning focuses on…

Machine Learning · Computer Science 2021-04-27 Łukasz Korycki , Bartosz Krawczyk

Few-Shot Class-Incremental Learning (FSCIL) defines a practical but challenging task where models are required to continuously learn novel concepts with only a few training samples. Due to data scarcity, existing FSCIL methods resort to…

Computer Vision and Pattern Recognition · Computer Science 2024-12-18 Chengyan Liu , Linglan Zhao , Fan Lyu , Kaile Du , Fuyuan Hu , Tao Zhou

We propose Exemplar-Condensed federated class-incremental learning (ECoral) to distil the training characteristics of real images from streaming data into informative rehearsal exemplars. The proposed method eliminates the limitations of…

Machine Learning · Computer Science 2025-06-04 Rui Sun , Yumin Zhang , Varun Ojha , Tejal Shah , Haoran Duan , Bo Wei , Rajiv Ranjan

Federated learning (FL) enables collaborative machine learning across distributed data owners, but data heterogeneity poses a challenge for model calibration. While prior work focused on improving accuracy for non-iid data, calibration…

Machine Learning · Computer Science 2024-06-05 Hongyi Peng , Han Yu , Xiaoli Tang , Xiaoxiao Li

Novel classes frequently arise in our dynamically changing world, e.g., new users in the authentication system, and a machine learning model should recognize new classes without forgetting old ones. This scenario becomes more challenging…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Da-Wei Zhou , Fu-Yun Wang , Han-Jia Ye , Liang Ma , Shiliang Pu , De-Chuan Zhan

Federated learning (FL) underpins advancements in privacy-preserving distributed computing by collaboratively training neural networks without exposing clients' raw data. Current FL paradigms primarily focus on uni-modal data, while…

Machine Learning · Computer Science 2024-01-03 Yunfeng Fan , Wenchao Xu , Haozhao Wang , Jiaqi Zhu , Song Guo

Class-bias, that is class-wise performance disparities, is typically attributed to data imbalance and addressed through frequency-based resampling. However, we demonstrate that substantial bias persists even in perfectly balanced datasets,…

Machine Learning · Computer Science 2026-04-13 Pawel Pukowski , Venet Osmani

Class-incremental learning (CIL) aims to acquire new classes over time while retaining prior knowledge, yet most setups and methods assume balanced task streams. In practice, the number of classes per task often varies significantly. We…

Computer Vision and Pattern Recognition · Computer Science 2026-03-12 Xiaoyan Zhang , Jiangpeng He

Given a model well-trained with a large-scale base dataset, Few-Shot Class-Incremental Learning (FSCIL) aims at incrementally learning novel classes from a few labeled samples by avoiding overfitting, without catastrophically forgetting all…

Computer Vision and Pattern Recognition · Computer Science 2023-01-25 Yawen Cui , Wanxia Deng , Haoyu Chen , Li Liu

For most real-world applications, robots need to adapt and learn continually with limited data in their environments. In this paper, we consider the problem of Few-Shot class Incremental Learning (FSIL), in which an AI agent is required to…

Robotics · Computer Science 2023-08-02 Ali Ayub , Alan R. Wagner

Non-exemplar class-incremental learning (NECIL) is to resist catastrophic forgetting without saving old class samples. Prior methodologies generally employ simple rules to generate features for replaying, suffering from large distribution…

Computer Vision and Pattern Recognition · Computer Science 2024-08-07 Jichuan Zhang , Yali Li , Xin Liu , Shengjin Wang

Few-Shot Class-Incremental Learning (FSCIL) represents a cutting-edge paradigm within the broader scope of machine learning, designed to empower models with the ability to assimilate new classes of data with limited examples while…

Machine Learning · Computer Science 2025-03-17 Marinela Adam

Low-Earth-orbit (LEO) satellite constellations are increasingly performing on-board computing. However, the continuous emergence of new classes under strict memory and communication constraints poses major challenges for collaborative…

Networking and Internet Architecture · Computer Science 2026-04-06 Heng Zhang , Xiaohong Deng , Sijing Duan , Wu Ouyang , KM Mahfujul , Yiqin Deng , Zhigang Chen

Online class-incremental learning (OCIL) focuses on gradually learning new classes (called plasticity) from a stream of data in a single-pass, while concurrently preserving knowledge of previously learned classes (called stability). The…

Machine Learning · Computer Science 2025-12-12 Shunjie Wen , Thomas Heinis , Dong-Wan Choi