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The visual world naturally exhibits a long-tailed distribution of open classes, which poses great challenges to modern visual systems. Existing approaches either perform class re-balancing strategies or directly improve network modules to…

Computer Vision and Pattern Recognition · Computer Science 2021-11-30 Teli Ma , Shijie Geng , Mengmeng Wang , Jing Shao , Jiasen Lu , Hongsheng Li , Peng Gao , Yu Qiao

Recently, large-scale pre-trained vision-language models have presented benefits for alleviating class imbalance in long-tailed recognition. However, the long-tailed data distribution can corrupt the representation space, where the distance…

Computer Vision and Pattern Recognition · Computer Science 2023-11-07 Siming Fu , Xiaoxuan He , Xinpeng Ding , Yuchen Cao , Hualiang Wang

Most of the medical tasks naturally exhibit a long-tailed distribution due to the complex patient-level conditions and the existence of rare diseases. Existing long-tailed learning methods usually treat each class equally to re-balance the…

Computer Vision and Pattern Recognition · Computer Science 2025-05-29 Lie Ju , Yicheng Wu , Lin Wang , Zhen Yu , Xin Zhao , Xin Wang , Paul Bonnington , Zongyuan Ge

Training data for class-conditional image synthesis often exhibit a long-tailed distribution with limited images for tail classes. Such an imbalance causes mode collapse and reduces the diversity of synthesized images for tail classes. For…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Fang Chen , Alex Villa , Gongbo Liang , Xiaoyi Lu , Meng Tang

Medical term normalization consists in mapping a piece of text to a large number of output classes. Given the small size of the annotated datasets and the extremely long tail distribution of the concepts, it is of utmost importance to…

Computation and Language · Computer Science 2022-11-04 Beatrice Portelli , Simone Scaboro , Enrico Santus , Hooman Sedghamiz , Emmanuele Chersoni , Giuseppe Serra

Many practical medical imaging scenarios include categories that are under-represented but still crucial. The relevance of image recognition models to real-world applications lies in their ability to generalize to these rare classes as well…

Computer Vision and Pattern Recognition · Computer Science 2025-05-22 Daniya Najiha A. Kareem , Jean Lahoud , Mustansar Fiaz , Amandeep Kumar , Hisham Cholakkal

Pre-training plays a vital role in various vision tasks, such as object recognition and detection. Commonly used pre-training methods, which typically rely on randomized approaches like uniform or Gaussian distributions to initialize model…

Computer Vision and Pattern Recognition · Computer Science 2024-11-15 Chen-Long Duan , Yong Li , Xiu-Shen Wei , Lin Zhao

The problem of deep long-tailed learning, a prevalent challenge in the realm of generic visual recognition, persists in a multitude of real-world applications. To tackle the heavily-skewed dataset issue in long-tailed classification, prior…

Computer Vision and Pattern Recognition · Computer Science 2023-09-26 Wenxiang Xu , Yongcheng Jing , Linyun Zhou , Wenqi Huang , Lechao Cheng , Zunlei Feng , Mingli Song

The datasets used for Deep Neural Network training (e.g., ImageNet, MSCOCO, etc.) are often manually balanced across categories (classes) to facilitate learning of all the categories. This curation process is often expensive and requires…

Computer Vision and Pattern Recognition · Computer Science 2024-11-12 Harsh Rangwani

Recent methods for long-tailed instance segmentation still struggle on rare object classes with few training data. We propose a simple yet effective method, Feature Augmentation and Sampling Adaptation (FASA), that addresses the data…

Computer Vision and Pattern Recognition · Computer Science 2021-10-01 Yuhang Zang , Chen Huang , Chen Change Loy

Long-tailed multi-label visual recognition (LTML) task is a highly challenging task due to the label co-occurrence and imbalanced data distribution. In this work, we propose a unified framework for LTML, namely prompt tuning with…

Computer Vision and Pattern Recognition · Computer Science 2024-06-19 Peng Xia , Di Xu , Ming Hu , Lie Ju , Zongyuan Ge

For long-tailed classification, most works often pretrain a big model on a large-scale dataset, and then fine-tune the whole model for adapting to long-tailed data. Though promising, fine-tuning the whole pretrained model tends to suffer…

Computer Vision and Pattern Recognition · Computer Science 2023-03-29 Bowen Dong , Pan Zhou , Shuicheng Yan , Wangmeng Zuo

One of the most profound challenges of modern machine learning is performing well on the long-tail of rare and underrepresented features. Large general-purpose models are trained for many tasks, but work best on high-frequency use cases.…

Computation and Language · Computer Science 2025-06-18 Daniel D'souza , Julia Kreutzer , Adrien Morisot , Ahmet Üstün , Sara Hooker

Real-world data typically follow a long-tailed distribution, where a few majority categories occupy most of the data while most minority categories contain a limited number of samples. Classification models minimizing cross-entropy struggle…

Computer Vision and Pattern Recognition · Computer Science 2022-09-13 Jianggang Zhu , Zheng Wang , Jingjing Chen , Yi-Ping Phoebe Chen , Yu-Gang Jiang

In scenarios with long-tailed distributions, the model's ability to identify tail classes is limited due to the under-representation of tail samples. Class rebalancing, information augmentation, and other techniques have been proposed to…

Machine Learning · Computer Science 2023-10-17 Yanbiao Ma , Licheng Jiao , Fang Liu , Shuyuan Yang , Xu Liu , Lingling Li

3D perception plays an essential role for improving the safety and performance of autonomous driving. Yet, existing models trained on real-world datasets, which naturally exhibit long-tail distributions, tend to underperform on rare and…

Robotics · Computer Science 2025-05-27 Mahmut Yurt , Xin Ye , Yunsheng Ma , Jingru Luo , Abhirup Mallik , John Pauly , Burhaneddin Yaman , Liu Ren

The success of deep learning depends on large-scale and well-curated training data, while data in real-world applications are commonly long-tailed and noisy. Many methods have been proposed to deal with long-tailed data or noisy data, while…

Machine Learning · Computer Science 2023-05-30 Lefan Zhang , Zhang-Hao Tian , Wujun Zhou , Wei Wang

The problem of long-tailed recognition, where the number of examples per class is highly unbalanced, is considered. While training with class-balanced sampling has been shown effective for this problem, it is known to over-fit to few-shot…

Computer Vision and Pattern Recognition · Computer Science 2021-05-04 Bo Liu , Haoxiang Li , Hao Kang , Gang Hua , Nuno Vasconcelos

Data privacy and class imbalance are the norm rather than the exception in many machine learning tasks. Recent attempts have been launched to, on one side, address the problem of learning from pervasive private data, and on the other side,…

Machine Learning · Computer Science 2022-07-01 Zihan Chen , Songshang Liu , Hualiang Wang , Howard H. Yang , Tony Q. S. Quek , Zuozhu Liu

In the real world, data tends to follow long-tailed distributions w.r.t. class or attribution, motivating the challenging Long-Tailed Recognition (LTR) problem. In this paper, we revisit recent LTR methods with promising Vision Transformers…

Computer Vision and Pattern Recognition · Computer Science 2023-04-18 Zhengzhuo Xu , Shuo Yang , Xingjun Wang , Chun Yuan