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The recent success of denoising diffusion models has significantly advanced text-to-image generation. While these large-scale pretrained models show excellent performance in general image synthesis, downstream objectives often require…

Computer Vision and Pattern Recognition · Computer Science 2024-11-27 Maorong Wang , Jiafeng Mao , Xueting Wang , Toshihiko Yamasaki

This paper introduces a two-stage framework designed to enhance long-tail class incremental learning, enabling the model to progressively learn new classes, while mitigating catastrophic forgetting in the context of long-tailed data…

Computer Vision and Pattern Recognition · Computer Science 2023-11-03 Jayateja Kalla , Soma Biswas

Class-incremental learning (CIL) aims to adapt to continuously emerging new classes while preserving knowledge of previously learned ones. Few-shot class-incremental learning (FSCIL) presents a greater challenge that requires the model to…

Artificial Intelligence · Computer Science 2025-08-19 Shiwon Kim , Dongjun Hwang , Sungwon Woo , Rita Singh

Model fairness is becoming important in class-incremental learning for Trustworthy AI. While accuracy has been a central focus in class-incremental learning, fairness has been relatively understudied. However, naively using all the samples…

Machine Learning · Computer Science 2025-12-30 Jaeyoung Park , Minsu Kim , Steven Euijong Whang

Class imbalance remains a fundamental challenge in machine learning, where standard classifiers exhibit severe performance degradation in minority classes. Although existing approaches address imbalance through resampling or cost-sensitive…

Machine Learning · Computer Science 2026-02-10 Zahir Alsulaimawi

While 3D instance segmentation (3DIS) has advanced significantly, most existing methods assume that all object classes are known in advance and uniformly distributed. However, this assumption is unrealistic in dynamic, real-world…

Computer Vision and Pattern Recognition · Computer Science 2025-11-24 Vishal Thengane , Jean Lahoud , Hisham Cholakkal , Rao Muhammad Anwer , Lu Yin , Xiatian Zhu , Salman Khan

Class-incremental learning (CIL) poses significant challenges in open-world scenarios, where models must not only learn new classes over time without forgetting previous ones but also handle inputs from unknown classes that a closed-set…

Machine Learning · Computer Science 2025-09-26 Srishti Gupta , Daniele Angioni , Maura Pintor , Ambra Demontis , Lea Schönherr , Battista Biggio , Fabio Roli

Exemplar-Free Class Incremental Learning (efCIL) aims to continuously incorporate the knowledge from new classes while retaining previously learned information, without storing any old-class exemplars (i.e., samples). For this purpose,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-26 Libo Huang , Zhulin An , Yan Zeng , Chuanguang Yang , Xinqiang Yu , Yongjun Xu

Federated learning (FL) has attracted growing attention via data-private collaborative training on decentralized clients. However, most existing methods unrealistically assume object classes of the overall framework are fixed over time. It…

Machine Learning · Computer Science 2022-03-23 Jiahua Dong , Lixu Wang , Zhen Fang , Gan Sun , Shichao Xu , Xiao Wang , Qi Zhu

We study model confidence calibration in class-incremental learning, where models learn from sequential tasks with different class sets. While existing works primarily focus on accuracy, maintaining calibrated confidence has been largely…

Machine Learning · Computer Science 2025-03-31 Seong-Hyeon Hwang , Minsu Kim , Steven Euijong Whang

Incremental learning (IL) is an important task aimed at increasing the capability of a trained model, in terms of the number of classes recognizable by the model. The key problem in this task is the requirement of storing data (e.g. images)…

Computer Vision and Pattern Recognition · Computer Science 2019-04-16 Prithviraj Dhar , Rajat Vikram Singh , Kuan-Chuan Peng , Ziyan Wu , Rama Chellappa

Exemplar-free class-incremental learning (EFCIL) aims to mitigate catastrophic forgetting in class-incremental learning (CIL) without available historical training samples as exemplars. Compared with its exemplar-based CIL counterpart that…

Machine Learning · Computer Science 2025-12-18 Run He , Di Fang , Yizhu Chen , Kai Tong , Cen Chen , Yi Wang , Lap-pui Chau , Huiping Zhuang

Class Incremental Learning (CIL) aims to continuously learn new categories while retaining the knowledge of old ones. Pre-trained models (PTMs) show promising capabilities in CIL. However, existing approaches that apply lightweight…

Computer Vision and Pattern Recognition · Computer Science 2025-09-25 Kai Jiang , Zhengyan Shi , Dell Zhang , Hongyuan Zhang , Xuelong Li

Class imbalance is a fundamental problem in computer vision applications such as semantic segmentation. Specifically, uneven class distributions in a training dataset often result in unsatisfactory performance on under-represented classes.…

Computer Vision and Pattern Recognition · Computer Science 2022-02-07 Junjiao Tian , Niluthpol Mithun , Zach Seymour , Han-Pang Chiu , Zsolt Kira

Class-incremental learning (CIL) enables models to learn new classes progressively while preserving knowledge of previously learned ones. Recent advances in this field have shifted towards parameter-efficient fine-tuning techniques, with…

Computer Vision and Pattern Recognition · Computer Science 2025-08-13 Haoran Chen , Ping Wang , Zihan Zhou , Xu Zhang , Zuxuan Wu , Yu-Gang Jiang

Deep learning models have achieved state-of-the-art performance in many computer vision tasks. However, in real-world scenarios, novel classes that were unseen during training often emerge, requiring models to acquire new knowledge…

Computer Vision and Pattern Recognition · Computer Science 2025-09-01 Lucas Rakotoarivony

In class-incremental learning, an agent with limited resources needs to learn a sequence of classification tasks, forming an ever growing classification problem, with the constraint of not being able to access data from previous tasks. The…

Machine Learning · Computer Science 2024-05-29 Albin Soutif--Cormerais , Marc Masana , Joost van de Weijer , Bartłomiej Twardowski

Continual learning aims to provide intelligent agents that are capable of learning continually a sequence of tasks, building on previously learned knowledge. A key challenge in this learning paradigm is catastrophically forgetting…

Machine Learning · Computer Science 2021-01-18 Ghada Sokar , Decebal Constantin Mocanu , Mykola Pechenizkiy

Class-incremental learning (CIL) learns a classification model with training data of different classes arising progressively. Existing CIL either suffers from serious accuracy loss due to catastrophic forgetting, or invades data privacy by…

Machine Learning · Computer Science 2022-12-13 Huiping Zhuang , Zhenyu Weng , Hongxin Wei , Renchunzi Xie , Kar-Ann Toh , Zhiping Lin

In class-incremental learning (class-IL), models must classify all previously seen classes at test time without task-IDs, leading to task confusion. Despite being a key challenge, task confusion lacks a theoretical understanding. We present…

Machine Learning · Computer Science 2024-10-29 Milad Khademi Nori , Il-Min Kim