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Class-incremental learning (CIL) has been widely studied under the setting of starting from a small number of classes (base classes). Instead, we explore an understudied real-world setting of CIL that starts with a strong model pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2022-09-13 Tz-Ying Wu , Gurumurthy Swaminathan , Zhizhong Li , Avinash Ravichandran , Nuno Vasconcelos , Rahul Bhotika , Stefano Soatto

Class-Incremental Learning (CIL) aims to train a reliable model with the streaming data, which emerges unknown classes sequentially. Different from traditional closed set learning, CIL has two main challenges: 1) Novel class detection. The…

Machine Learning · Computer Science 2020-09-01 Yang Yang , Zhen-Qiang Sun , HengShu Zhu , Yanjie Fu , Hui Xiong , Jian Yang

Deep neural networks perform remarkably well in close-world scenarios. However, novel classes emerged continually in real applications, making it necessary to learn incrementally. Class-incremental learning (CIL) aims to gradually recognize…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Wenzhuo Liu , Fei Zhu , Cheng-Lin Liu

Class-Incremental Learning (CIL) aims to solve the neural networks' catastrophic forgetting problem, which refers to the fact that once the network updates on a new task, its performance on previously-learned tasks drops dramatically. Most…

Computer Vision and Pattern Recognition · Computer Science 2023-04-21 Libo Huang , Yan Zeng , Chuanguang Yang , Zhulin An , Boyu Diao , Yongjun Xu

Class-incremental learning (CIL) aims to train a model to learn new classes from non-stationary data streams without forgetting old ones. In this paper, we propose a new kind of connectionist model by tailoring neural unit dynamics that…

Machine Learning · Computer Science 2024-06-05 Depeng Li , Tianqi Wang , Junwei Chen , Wei Dai , Zhigang Zeng

Class-incremental learning (CIL) aims to recognize new classes incrementally while maintaining the discriminability of old classes. Most existing CIL methods are exemplar-based, i.e., storing a part of old data for retraining. Without…

Computer Vision and Pattern Recognition · Computer Science 2024-07-22 Fei Zhu , Xu-Yao Zhang , Zhen Cheng , Cheng-Lin Liu

In class-incremental learning (CIL) scenarios, the phenomenon of catastrophic forgetting caused by the classifier's bias towards the current task has long posed a significant challenge. It is mainly caused by the characteristic of…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Xusheng Cao , Haori Lu , Linlan Huang , Xialei Liu , Ming-Ming Cheng

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

Class-Incremental Learning (CIL) aims to sequentially learn new classes while mitigating catastrophic forgetting of previously learned knowledge. Conventional CIL approaches implicitly assume that classes are morphologically static,…

Machine Learning · Computer Science 2026-02-03 Zheng Zhang , Tao Hu , Xueheng Li , Yang Wang , Rui Li , Jie Zhang , Chengjun Xie

Class-Incremental Learning (CIL) trains a model to continually recognize new classes from non-stationary data while retaining learned knowledge. A major challenge of CIL arises when applying to real-world data characterized by non-uniform…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Jiangpeng He , Fengqing Zhu

Rehearsal-based continual learning (CL) mitigates catastrophic forgetting by maintaining a subset of samples from previous tasks for replay. Existing studies primarily focus on optimizing memory storage through coreset selection strategies.…

Machine Learning · Computer Science 2026-04-13 Minh-Duong Nguyen , Thien-Thanh Dao , Le-Tuan Nguyen , Dung D. Le , Kok-Seng Wong

Incremental learning remains a critical challenge in machine learning, as models often struggle with catastrophic forgetting -the tendency to lose previously acquired knowledge when learning new information. These challenges are even more…

Despite the great success of pre-trained language models, it is still a challenge to use these models for continual learning, especially for the class-incremental learning (CIL) setting due to catastrophic forgetting (CF). This paper…

Computation and Language · Computer Science 2023-07-21 Yijia Shao , Yiduo Guo , Dongyan Zhao , Bing Liu

Class Incremental Learning (CIL) requires models to continuously learn new classes without forgetting previously learned ones, while maintaining stable performance across all possible class sequences. In real-world settings, the order in…

Machine Learning · Computer Science 2026-03-05 Guannan Lai , Da-Wei Zhou , Xin Yang , Han-Jia Ye

The dynamic nature of open-world scenarios has attracted more attention to class incremental learning (CIL). However, existing CIL methods typically presume the availability of complete ground-truth labels throughout the training process,…

Machine Learning · Computer Science 2024-08-20 Jiaming Liu , Hongyuan Liu , Zhili Qin , Wei Han , Yulu Fan , Qinli Yang , Junming Shao

Class-incremental learning (CIL) aims to enable models to continuously learn new classes while overcoming catastrophic forgetting. The introduction of pre-trained models has brought new tuning paradigms to CIL. In this paper, we revisit…

Computer Vision and Pattern Recognition · Computer Science 2025-10-13 Qinhao Zhou , Yuwen Tan , Boqing Gong , Xiang Xiang

Class incremental learning (CIL) aims to recognize both the old and new classes along the increment tasks. Deep neural networks in CIL suffer from catastrophic forgetting and some approaches rely on saving exemplars from previous tasks,…

Computer Vision and Pattern Recognition · Computer Science 2024-03-19 Xiuwei Chen , Xiaobin Chang

Class Incremental Learning (CIL) aims at learning a multi-class classifier in a phase-by-phase manner, in which only data of a subset of the classes are provided at each phase. Previous works mainly focus on mitigating forgetting in phases…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Yujun Shi , Kuangqi Zhou , Jian Liang , Zihang Jiang , Jiashi Feng , Philip Torr , Song Bai , Vincent Y. F. Tan

Class incremental learning (CIL) aims to incrementally update a trained model with the new classes of samples (plasticity) while retaining previously learned ability (stability). To address the most challenging issue in this goal, i.e.,…

Computer Vision and Pattern Recognition · Computer Science 2023-08-04 Yuhang Zhou , Jiangchao Yao , Feng Hong , Ya Zhang , Yanfeng Wang

Class-incremental learning (CIL) aims to adapt to emerging new classes without forgetting old ones. Traditional CIL models are trained from scratch to continually acquire knowledge as data evolves. Recently, pre-training has achieved…

Machine Learning · Computer Science 2024-08-06 Da-Wei Zhou , Zi-Wen Cai , Han-Jia Ye , De-Chuan Zhan , Ziwei Liu