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Decision Transformer (DT) can learn effective policy from offline datasets by converting the offline reinforcement learning (RL) into a supervised sequence modeling task, where the trajectory elements are generated auto-regressively…

Machine Learning · Computer Science 2024-11-19 Zhihong Liu , Long Qian , Zeyang Liu , Lipeng Wan , Xingyu Chen , Xuguang Lan

Real-world data often follows a long-tailed distribution, which makes the performance of existing classification algorithms degrade heavily. A key issue is that samples in tail categories fail to depict their intra-class diversity. Humans…

Computer Vision and Pattern Recognition · Computer Science 2022-02-14 Xiaohua Chen , Yucan Zhou , Dayan Wu , Wanqian Zhang , Yu Zhou , Bo Li , Weiping Wang

Benchmark datasets for visual recognition assume that data is uniformly distributed, while real-world datasets obey long-tailed distribution. Current approaches handle the long-tailed problem to transform the long-tailed dataset to uniform…

Computer Vision and Pattern Recognition · Computer Science 2022-04-25 Renhui Zhang , Tiancheng Lin , Rui Zhang , Yi Xu

Deep neural networks and in particular, deep neural classifiers have become an integral part of many modern applications. Despite their practical success, we still have limited knowledge of how they work and the demand for such an…

Machine Learning · Computer Science 2020-06-04 Hamid Karimi , Tyler Derr , Jiliang Tang

Object frequency in the real world often follows a power law, leading to a mismatch between datasets with long-tailed class distributions seen by a machine learning model and our expectation of the model to perform well on all classes. We…

Computer Vision and Pattern Recognition · Computer Science 2020-03-25 Muhammad Abdullah Jamal , Matthew Brown , Ming-Hsuan Yang , Liqiang Wang , Boqing Gong

Despite extensive research on training generative adversarial networks (GANs) with limited training data, learning to generate images from long-tailed training distributions remains fairly unexplored. In the presence of imbalanced…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Saeed Khorram , Mingqi Jiang , Mohamad Shahbazi , Mohamad H. Danesh , Li Fuxin

In the real-world setting, data often follows a long-tailed distribution, where head classes contain significantly more training samples than tail classes. Consequently, models trained on such data tend to be biased toward head classes. The…

Computer Vision and Pattern Recognition · Computer Science 2024-03-15 Fan Zhang , Wei Qin , Weijieying Ren , Lei Wang , Zetong Chen , Richang Hong

Deploying deep models in real-world scenarios entails a number of challenges, including computational efficiency and real-world (e.g., long-tailed) data distributions. We address the combined challenge of learning long-tailed distributions…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Jihun Kim , Dahyun Kim , Hyungrok Jung , Taeil Oh , Jonghyun Choi

It is difficult to anticipate the myriad challenges that a predictive model will encounter once deployed. Common practice entails a reactive, cyclical approach: model deployment, data mining, and retraining. We instead develop a proactive…

Deep long-tailed learning, one of the most challenging problems in visual recognition, aims to train well-performing deep models from a large number of images that follow a long-tailed class distribution. In the last decade, deep learning…

Computer Vision and Pattern Recognition · Computer Science 2023-04-18 Yifan Zhang , Bingyi Kang , Bryan Hooi , Shuicheng Yan , Jiashi Feng

Long-tail recognition is challenging because it requires the model to learn good representations from tail categories and address imbalances across all categories. In this paper, we propose a novel generative and fine-tuning framework,…

Computer Vision and Pattern Recognition · Computer Science 2024-05-28 Qihao Zhao , Yalun Dai , Hao Li , Wei Hu , Fan Zhang , Jun Liu

Current long-tailed semi-supervised learning methods assume that labeled data exhibit a long-tailed distribution, and unlabeled data adhere to a typical predefined distribution (i.e., long-tailed, uniform, or inverse long-tailed). However,…

Computer Vision and Pattern Recognition · Computer Science 2025-12-12 Yaxin Hou , Bo Han , Yuheng Jia , Hui Liu , Junhui Hou

Image and multimodal machine learning tasks are very challenging to solve in the case of poorly distributed data. In particular, data availability and privacy restrictions exacerbate these hurdles in the medical domain. The state of the art…

Computer Vision and Pattern Recognition · Computer Science 2025-02-03 Rafael Elberg , Denis Parra , Mircea Petrache

Long-tailed learning has garnered increasing attention due to its practical significance. Among the various approaches, the fine-tuning paradigm has gained considerable interest with the advent of foundation models. However, most existing…

Machine Learning · Computer Science 2025-08-11 Jiahao Chen , Bin Qin , Jiangmeng Li , Hao Chen , Bing Su

Long-tailed imbalance distribution is a common issue in practical computer vision applications. Previous works proposed methods to address this problem, which can be categorized into several classes: re-sampling, re-weighting, transfer…

Computer Vision and Pattern Recognition · Computer Science 2024-04-24 Pengxiao Han , Changkun Ye , Jieming Zhou , Jing Zhang , Jie Hong , Xuesong Li

The heavy reliance on data is one of the major reasons that currently limit the development of deep learning. Data quality directly dominates the effect of deep learning models, and the long-tailed distribution is one of the factors…

Computer Vision and Pattern Recognition · Computer Science 2022-05-30 Lu Yang , He Jiang , Qing Song , Jun Guo

Long-tailed class distributions are pervasive in multi-class medical datasets and pose significant challenges for deep learning models which typically underperform on tail classes with limited samples. This limitation is particularly…

Computer Vision and Pattern Recognition · Computer Science 2026-05-06 Jiaxiang Jiang , Mahesh Subedar , Omesh Tickoo

Sequential user behavior modeling plays a crucial role in online user-oriented services, such as product purchasing, news feed consumption, and online advertising. The performance of sequential modeling heavily depends on the scale and…

Machine Learning · Computer Science 2020-11-03 Jianwen Yin , Chenghao Liu , Weiqing Wang , Jianling Sun , Steven C. H. Hoi

Balancing training on long-tail data distributions remains a long-standing challenge in deep learning. While methods such as re-weighting and re-sampling help alleviate the imbalance issue, limited sample diversity continues to hinder…

Computer Vision and Pattern Recognition · Computer Science 2024-12-10 Shizhen Zhao , Xin Wen , Jiahui Liu , Chuofan Ma , Chunfeng Yuan , Xiaojuan Qi

Real-world data is often unbalanced and long-tailed, but deep models struggle to recognize rare classes in the presence of frequent classes. To address unbalanced data, most studies try balancing the data, the loss, or the classifier to…

Machine Learning · Computer Science 2021-11-02 Dvir Samuel , Gal Chechik