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Class incremental learning (CIL) trains a network on sequential tasks with separated categories in each task but suffers from catastrophic forgetting, where models quickly lose previously learned knowledge when acquiring new tasks. The…

Machine Learning · Computer Science 2024-11-05 Huiping Zhuang , Yizhu Chen , Di Fang , Run He , Kai Tong , Hongxin Wei , Ziqian Zeng , Cen Chen

We consider class incremental learning (CIL) problem, in which a learning agent continuously learns new classes from incrementally arriving training data batches and aims to predict well on all the classes learned so far. The main challenge…

Computer Vision and Pattern Recognition · Computer Science 2022-06-22 Hongjoon Ahn , Jihwan Kwak , Subin Lim , Hyeonsu Bang , Hyojun Kim , Taesup Moon

Existing continual learning (CL) research regards catastrophic forgetting (CF) as almost the only challenge. This paper argues for another challenge in class-incremental learning (CIL), which we call cross-task class discrimination…

Machine Learning · Computer Science 2023-05-25 Yiduo Guo , Bing Liu , Dongyan Zhao

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

Continual learning (or class incremental learning) is a realistic learning scenario for computer vision systems, where deep neural networks are trained on episodic data, and the data from previous episodes are generally inaccessible to the…

Computer Vision and Pattern Recognition · Computer Science 2026-02-05 Aditya R. Bhattacharya , Debanjan Goswami , Shayok Chakraborty

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

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

Class Incremental Learning (CIL) aims to enable models to learn new classes sequentially while retaining knowledge of previous ones. Although current methods have alleviated catastrophic forgetting (CF), recent studies highlight that the…

Machine Learning · Computer Science 2025-03-19 Guannan Lai , Yujie Li , Xiangkun Wang , Junbo Zhang , Tianrui Li , Xin Yang

Class Incremental Learning (CIL) is challenging due to catastrophic forgetting. On top of that, Exemplar-free Class Incremental Learning is even more challenging due to forbidden access to previous task data. Recent exemplar-free CIL…

Computer Vision and Pattern Recognition · Computer Science 2024-07-23 Zichong Meng , Jie Zhang , Changdi Yang , Zheng Zhan , Pu Zhao , Yanzhi Wang

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) based on pre-trained models offers a promising direction for open-world continual learning. Existing methods typically rely on correlation-based strategies, where an image's classification feature is used as…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Libo Huang , Zhulin An , Chuanguang Yang , Boyu Diao , Fei Wang , Yan Zeng , Zhifeng Hao , Yongjun Xu

Class-incremental learning (CIL) aims to train a classification model while the number of classes increases phase-by-phase. An inherent challenge of CIL is the stability-plasticity tradeoff, i.e., CIL models should keep stable to retain old…

Machine Learning · Computer Science 2023-06-30 Yaoyao Liu , Yingying Li , Bernt Schiele , Qianru Sun

New categories may be introduced over time, or existing categories may need to be reclassified. Class incremental learning (CIL) is employed for the gradual acquisition of knowledge about new categories while preserving information about…

Machine Learning · Computer Science 2024-01-08 Zhiwei Zuo , Zhuo Tang , Bin Wang , Kenli Li , Anwitaman Datta

This paper studies the problem of class-incremental learning (CIL), a core setting within continual learning where a model learns a sequence of tasks, each containing a distinct set of classes. Traditional CIL methods, which do not leverage…

Machine Learning · Computer Science 2025-11-19 Saleh Momeni , Changnan Xiao , Bing Liu

This paper presents a practical and simple yet efficient method to effectively deal with the catastrophic forgetting for Class Incremental Learning (CIL) tasks. CIL tends to learn new concepts perfectly, but not at the expense of…

Machine Learning · Computer Science 2021-03-30 Bahram Mohammadi , Mohammad Sabokrou

The rehearsal strategy is widely used to alleviate the catastrophic forgetting problem in class incremental learning (CIL) by preserving limited exemplars from previous tasks. With imbalanced sample numbers between old and new classes, the…

Computer Vision and Pattern Recognition · Computer Science 2023-08-28 Xiuwei Chen , Xiaobin Chang

When learning new tasks in a sequential manner, deep neural networks tend to forget tasks that they previously learned, a phenomenon called catastrophic forgetting. Class incremental learning methods aim to address this problem by keeping a…

Machine Learning · Computer Science 2022-06-20 Jinlin Xiang , Eli Shlizerman

We tackle the problem of class incremental learning (CIL) in the realm of landcover classification from optical remote sensing (RS) images in this paper. The paradigm of CIL has recently gained much prominence given the fact that data are…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 S Divakar Bhat , Biplab Banerjee , Subhasis Chaudhuri , Avik Bhattacharya

Class-incremental Learning (CIL) enables the model to incrementally absorb knowledge from new classes and build a generic classifier across all previously encountered classes. When the model optimizes with new classes, the knowledge of…

Computer Vision and Pattern Recognition · Computer Science 2025-03-31 Juncen Guo , Xiaoguang Zhu , Liangyu Teng , Hao Yang , Jing Liu , Yang Liu , Liang Song

Machine Learning (ML) models struggle with data that changes over time or across domains due to factors such as noise, occlusion, illumination, or frequency, unlike humans who can learn from such non independent and identically distributed…

Machine Learning · Computer Science 2023-06-22 Gusseppe Bravo-Rocca , Peini Liu , Jordi Guitart , Ajay Dholakia , David Ellison