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Most existing methods that cope with noisy labels usually assume that the class distributions are well balanced, which has insufficient capacity to deal with the practical scenarios where training samples have imbalanced distributions. To…

Computer Vision and Pattern Recognition · Computer Science 2022-09-27 Chaowei Fang , Lechao Cheng , Huiyan Qi , Dingwen Zhang

The distribution of data in the world (eg, internet, etc.) significantly differs from the well-curated datasets and is often over-populated with samples from common categories. The algorithms designed for well-curated datasets perform…

Machine Learning · Computer Science 2025-07-30 Harsh Rangwani

In this work, we tackle the challenging problem of long-tailed image recognition. Previous long-tailed recognition approaches mainly focus on data augmentation or re-balancing strategies for the tail classes to give them more attention…

Computer Vision and Pattern Recognition · Computer Science 2023-09-15 Weide Liu , Zhonghua Wu , Yiming Wang , Henghui Ding , Fayao Liu , Jie Lin , Guosheng Lin

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

Many real-world classification problems, such as plant identification, have extremely long-tailed class distributions. In order for prediction sets to be useful in such settings, they should (i) provide good class-conditional coverage,…

Machine Learning · Statistics 2026-03-02 Tiffany Ding , Jean-Baptiste Fermanian , Joseph Salmon

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

Long-tailed class imbalance remains a fundamental obstacle in semantic segmentation of high-resolution remote-sensing imagery, where dominant classes shape learned representations and rare classes are systematically under-segmented. This…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Buddhi Wijenayake , Nichula Wasalathilake , Roshan Godaliyadda , Vijitha Herath , Parakrama Ekanayake , Vishal M. Patel

Graph classification, aiming at learning the graph-level representations for effective class assignments, has received outstanding achievements, which heavily relies on high-quality datasets that have balanced class distribution. In fact,…

Machine Learning · Computer Science 2023-09-06 Siyu Yi , Zhengyang Mao , Wei Ju , Yongdao Zhou , Luchen Liu , Xiao Luo , Ming Zhang

Deep learning-based food image classification enables precise identification of food categories, further facilitating accurate nutritional analysis. However, real-world food images often show a skewed distribution, with some food types…

Computer Vision and Pattern Recognition · Computer Science 2025-06-03 GaYeon Koh , Hyun-Jic Oh , Jeonghyun Noh , Won-Ki Jeong

Real-world data tends to follow a long-tailed distribution, where the class imbalance results in dominance of the head classes during training. In this paper, we propose a frustratingly simple but effective step-wise learning framework to…

Computer Vision and Pattern Recognition · Computer Science 2023-05-23 Na Dong , Yongqiang Zhang , Mingli Ding , Gim Hee Lee

This paper explores test-agnostic long-tail recognition, a challenging long-tail task where the test label distributions are unknown and arbitrarily imbalanced. We argue that the variation in these distributions can be broken down…

Machine Learning · Computer Science 2026-03-02 Zhiyong Yang , Qianqian Xu , Sicong Li , Zitai Wang , Xiaochun Cao , Qingming Huang

The imbalanced distribution of long-tailed data presents a considerable challenge for deep learning models, as it causes them to prioritize the accurate classification of head classes but largely disregard tail classes. The biased decision…

Computer Vision and Pattern Recognition · Computer Science 2025-06-06 Mengke Li , Zhikai Hu , Yang Lu , Weichao Lan , Yiu-ming Cheung , Hui Huang

Learning from real-world data is frequently hindered by the compound challenge of long-tailed class distributions and noisy annotations. Existing methods partially address these issues but typically ignore the non-uniform impact of label…

Computer Vision and Pattern Recognition · Computer Science 2026-05-25 Mengke Li , Haiquan Ling , Lihao Chen , Yang Lu , Yiqun Zhang , Hui Huang

Real-world datasets commonly exhibit noisy labels and class imbalance, such as long-tailed distributions. While previous research addresses this issue by differentiating noisy and clean samples, reliance on information from predictions…

Machine Learning · Computer Science 2024-03-06 Ying-Hsuan Wu , Jun-Wei Hsieh , Li Xin , Shin-You Teng , Yi-Kuan Hsieh , Ming-Ching Chang

Long-tailed learning has attracted much attention recently, with the goal of improving generalisation for tail classes. Most existing works use supervised learning without considering the prevailing noise in the training dataset. To move…

Machine Learning · Computer Science 2021-08-27 Tong Wei , Jiang-Xin Shi , Wei-Wei Tu , Yu-Feng Li

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

Class imbalance problems frequently occur in real-world tasks, and conventional deep learning algorithms are well known for performance degradation on imbalanced training datasets. To mitigate this problem, many approaches have aimed to…

Computer Vision and Pattern Recognition · Computer Science 2023-02-14 Sumyeong Ahn , Jongwoo Ko , Se-Young Yun

Real-world data often follow a long-tailed distribution with a high imbalance in the number of samples between classes. The problem with training from imbalanced data is that some background features, common to all classes, can be…

Computer Vision and Pattern Recognition · Computer Science 2024-06-05 Sanglee Park , Seung-won Hwang , Jungmin So

In many real-world applications, the frequency distribution of class labels for training data can exhibit a long-tailed distribution, which challenges traditional approaches of training deep neural networks that require heavy amounts of…

Computer Vision and Pattern Recognition · Computer Science 2024-09-06 Richard Franklin , Jiawei Yao , Deyang Zhong , Qi Qian , Juhua Hu

This paper presents an investigation into long-tail video recognition. We demonstrate that, unlike naturally-collected video datasets and existing long-tail image benchmarks, current video benchmarks fall short on multiple long-tailed…

Computer Vision and Pattern Recognition · Computer Science 2023-04-04 Toby Perrett , Saptarshi Sinha , Tilo Burghardt , Majid Mirmehdi , Dima Damen