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The generalization gap on the long-tailed data sets is largely owing to most categories only occupying a few training samples. Decoupled training achieves better performance by training backbone and classifier separately. What causes the…

计算机视觉与模式识别 · 计算机科学 2023-03-13 Zhiwei Zhang

Loss reweighting is a widely used strategy for long-tailed classification, but existing reweighting strategies often rely on heuristics and rarely define a well-specified target. Inspired by Neural Collapse (NC), the ideal simplex…

机器学习 · 计算机科学 2026-05-12 Jinping Wang , Zixin Tong , Zhiwu Xie , Zhiqiang Gao

In deep neural network, the cross-entropy loss function is commonly used for classification. Minimizing cross-entropy is equivalent to maximizing likelihood under assumptions of uniform feature and class distributions. It belongs to…

机器学习 · 计算机科学 2018-05-01 Donglai Zhu , Hengshuai Yao , Bei Jiang , Peng Yu

In a typical multi-label setting, a picture contains on average few positive labels, and many negative ones. This positive-negative imbalance dominates the optimization process, and can lead to under-emphasizing gradients from positive…

计算机视觉与模式识别 · 计算机科学 2021-07-30 Emanuel Ben-Baruch , Tal Ridnik , Nadav Zamir , Asaf Noy , Itamar Friedman , Matan Protter , Lihi Zelnik-Manor

Given imbalanced data, it is hard to train a good classifier using deep learning because of the poor generalization of minority classes. Traditionally, the well-known synthetic minority oversampling technique (SMOTE) for data augmentation,…

机器学习 · 计算机科学 2023-11-06 Wei-Chao Cheng , Tan-Ha Mai , Hsuan-Tien Lin

We develop new approaches in multi-class settings for constructing proper scoring rules and hinge-like losses and establishing corresponding regret bounds with respect to the zero-one or cost-weighted classification loss. Our construction…

统计理论 · 数学 2021-05-18 Zhiqiang Tan , Xinwei Zhang

Learning unbiased node representations under class-imbalanced graph data is challenging due to interactions between adjacent nodes. Existing studies have in common that they compensate the minor class nodes `as a group' according to their…

机器学习 · 计算机科学 2022-06-28 Jaeyun Song , Joonhyung Park , Eunho Yang

Data mixing methods play a crucial role in semi-supervised learning (SSL), but their application is unexplored in long-tailed semi-supervised learning (LTSSL). The primary reason is that the in-batch mixing manner fails to address class…

计算机视觉与模式识别 · 计算机科学 2024-04-02 Hongwei Zheng , Linyuan Zhou , Han Li , Jinming Su , Xiaoming Wei , Xiaoming Xu

Multi-label classification is a widely encountered problem in daily life, where an instance can be associated with multiple classes. In theory, this is a supervised learning method that requires a large amount of labeling. However,…

计算机视觉与模式识别 · 计算机科学 2023-08-02 XIn Zhang , Yuqi Song , Fei Zuo , Xiaofeng Wang

This study proposes a method for imbalanced data classification based on deep probabilistic graphical models (DPGMs) to solve the problem that traditional methods have insufficient learning ability for minority class samples. To address the…

机器学习 · 计算机科学 2025-04-09 Yujia Lou , Jie Liu , Yuan Sheng , Jiawei Wang , Yiwei Zhang , Yaokun Ren

In this paper, we propose a general framework to learn a robust large-margin binary classifier when corrupt measurements, called anomalies, caused by sensor failure might be present in the training set. The goal is to minimize the…

机器学习 · 计算机科学 2016-11-17 Tianpei Xie , Nasser M. Nasrabadi , Alfred O. Hero

This paper investigates the deep learning optimization problem with softmax cross-entropy loss. We propose a layer separation strategy to alleviate the strong nonconvexity encountered during training deep networks. For cross-entropy models…

机器学习 · 计算机科学 2026-04-28 Yaru Liu , Michael K. Ng , Yiqi Gu

With the rapid increase of large-scale, real-world datasets, it becomes critical to address the problem of long-tailed data distribution (i.e., a few classes account for most of the data, while most classes are under-represented). Existing…

计算机视觉与模式识别 · 计算机科学 2019-01-18 Yin Cui , Menglin Jia , Tsung-Yi Lin , Yang Song , Serge Belongie

Medical images commonly exhibit multiple abnormalities. Predicting them requires multi-class classifiers whose training and desired reliable performance can be affected by a combination of factors, such as, dataset size, data source,…

图像与视频处理 · 电气工程与系统科学 2021-11-16 Sivaramakrishnan Rajaraman , Ghada Zamzmi , Sameer Antani

This paper presents an analysis regarding an influence of the Distance Metric Learning (DML) loss functions on the supervised fine-tuning of the language models for classification tasks. We experimented with known datasets from SentEval…

计算与语言 · 计算机科学 2022-11-29 Witold Sosnowski , Karolina Seweryn , Anna Wróblewska , Piotr Gawrysiak

Early-stage disease indications are rarely recorded in real-world domains, such as Agriculture and Healthcare, and yet, their accurate identification is critical in that point of time. In this type of highly imbalanced classification…

计算机视觉与模式识别 · 计算机科学 2021-09-21 Veysel Kocaman , Ofer M. Shir , Thomas Baeck

Oversampling is one of the most widely used approaches for addressing imbalanced classification. The core idea is to generate additional minority samples to rebalance the dataset. Most existing methods, such as SMOTE, require converting…

机器学习 · 计算机科学 2025-10-14 Dang Nguyen , Sunil Gupta , Kien Do , Thin Nguyen , Taylor Braund , Alexis Whitton , Svetha Venkatesh

Nowadays, deep learning is the standard approach for a wide range of problems, including biometrics, such as face recognition and speech recognition, etc. Biometric problems often use deep learning models to extract features from images,…

计算机视觉与模式识别 · 计算机科学 2022-02-14 Pedro Silva , Gladston Moreira , Vander Freitas , Rodrigo Silva , David Menotti , Eduardo Luz

Data imbalance presents a significant challenge in various machine learning (ML) tasks, particularly named entity recognition (NER) within natural language processing (NLP). NER exhibits a data imbalance with a long-tail distribution,…

计算与语言 · 计算机科学 2025-01-22 Sota Nemoto , Shunsuke Kitada , Hitoshi Iyatomi

Label distribution learning (LDL) is an interpretable and general learning paradigm that has been applied in many real-world applications. In contrast to the simple logical vector in single-label learning (SLL) and multi-label learning…

机器学习 · 计算机科学 2020-07-08 Xinyuan Liu , Jihua Zhu , Qinghai Zheng , Zhongyu Li , Ruixin Liu , Jun Wang