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Real-world data usually suffers from severe class imbalance and long-tailed distributions, where minority classes are significantly underrepresented compared to the majority ones. Recent research prefers to utilize multi-expert…

计算机视觉与模式识别 · 计算机科学 2023-05-08 Zhengzhuo Xu , Zenghao Chai , Chengyin Xu , Chun Yuan , Haiqin Yang

Many data distributions in the real world are hardly uniform. Instead, skewed and long-tailed distributions of various kinds are commonly observed. This poses an interesting problem for machine learning, where most algorithms assume or work…

机器学习 · 计算机科学 2024-04-25 Charika de Alvis , Suranga Seneviratne

Contrastive representation learning has been recently proved to be very efficient for self-supervised training. These methods have been successfully used to train encoders which perform comparably to supervised training on downstream…

机器学习 · 计算机科学 2020-12-03 Ibrahim Merad , Yiyang Yu , Emmanuel Bacry , Stéphane Gaïffas

Long-tail recognition tackles the natural non-uniformly distributed data in real-world scenarios. While modern classifiers perform well on populated classes, its performance degrades significantly on tail classes. Humans, however, are less…

计算机视觉与模式识别 · 计算机科学 2020-07-21 Tz-Ying Wu , Pedro Morgado , Pei Wang , Chih-Hui Ho , Nuno Vasconcelos

Contrastive learning between different views of the data achieves outstanding success in the field of self-supervised representation learning and the learned representations are useful in broad downstream tasks. Since all supervision…

计算机视觉与模式识别 · 计算机科学 2022-04-05 Haoqing Wang , Xun Guo , Zhi-Hong Deng , Yan Lu

Simplicity Bias (SB) is a phenomenon that deep neural networks tend to rely favorably on simpler predictive patterns but ignore some complex features when applied to supervised discriminative tasks. In this work, we investigate SB in…

计算机视觉与模式识别 · 计算机科学 2023-02-08 Xiu-Shen Wei , Xuhao Sun , Yang Shen , Anqi Xu , Peng Wang , Faen Zhang

As the data scale grows, deep recognition models often suffer from long-tailed data distributions due to the heavy imbalanced sample number across categories. Indeed, real-world data usually exhibit some similarity relation among different…

计算机视觉与模式识别 · 计算机科学 2022-08-18 Lei Liu , Li Liu

Real-world data are long-tailed, the lack of tail samples leads to a significant limitation in the generalization ability of the model. Although numerous approaches of class re-balancing perform well for moderate class imbalance problems,…

计算机视觉与模式识别 · 计算机科学 2024-09-04 Yanbiao Ma , Licheng Jiao , Fang Liu , Shuyuan Yang , Xu Liu , Puhua Chen

Cognitive diagnosis is a fundamental yet critical research task in the field of intelligent education, which aims to discover the proficiency level of different students on specific knowledge concepts. Despite the effectiveness of existing…

计算机与社会 · 计算机科学 2022-10-18 Shanshan Wang , Zhen Zeng , Xun Yang , Xingyi Zhang

Dealing with severe class imbalance poses a major challenge for real-world applications, especially when the accurate classification and generalization of minority classes is of primary interest. In computer vision, learning from long…

计算机视觉与模式识别 · 计算机科学 2021-11-22 Zidi Xiu , Junya Chen , Ricardo Henao , Benjamin Goldstein , Lawrence Carin , Chenyang Tao

Neural network based speech recognition systems suffer from performance degradation due to accented speech, especially unfamiliar accents. In this paper, we study the supervised contrastive learning framework for accented speech…

声音 · 计算机科学 2021-07-05 Tao Han , Hantao Huang , Ziang Yang , Wei Han

The real-world data distribution is essentially long-tailed, which poses great challenge to the deep model. In this work, we propose a new method, Gradual Balanced Loss and Adaptive Feature Generator (GLAG) to alleviate imbalance. GLAG…

计算机视觉与模式识别 · 计算机科学 2022-03-02 Zihan Zhang , Xiang Xiang

Recognition problems in long-tailed data, in which the sample size per class is heavily skewed, have gained importance because the distribution of the sample size per class in a dataset is generally exponential unless the sample size is…

机器学习 · 计算机科学 2024-04-30 Naoya Hasegawa , Issei Sato

Contrastive representation learning has gained much attention due to its superior performance in learning representations from both image and sequential data. However, the learned representations could potentially lead to performance…

计算与语言 · 计算机科学 2022-11-01 Jianfeng Chi , William Shand , Yaodong Yu , Kai-Wei Chang , Han Zhao , Yuan Tian

The imbalance (or long-tail) is the nature of many real-world data distributions, which often induces the undesirable bias of deep classification models toward frequent classes, resulting in poor performance for tail classes. In this paper,…

机器学习 · 计算机科学 2025-10-13 Fudong Lin , Xu Yuan

Recently the deep learning has shown its advantage in representation learning and clustering for time series data. Despite the considerable progress, the existing deep time series clustering approaches mostly seek to train the deep neural…

机器学习 · 计算机科学 2023-01-02 Ying Zhong , Dong Huang , Chang-Dong Wang

In this work, we address the challenging task of long-tailed image recognition. Previous long-tailed recognition methods commonly focus on the data augmentation or re-balancing strategy of the tail classes to give more attention to tail…

计算机视觉与模式识别 · 计算机科学 2022-09-13 Weide Liu , Zhonghua Wu , Yiming Wang , Henghui Ding , Fayao Liu , Jie Lin , Guosheng Lin

Contrastive learning is a family of self-supervised methods where a model is trained to solve a classification task constructed from unlabeled data. It has recently emerged as one of the leading learning paradigms in the absence of labels…

机器学习 · 统计学 2021-03-05 Bingbin Liu , Pradeep Ravikumar , Andrej Risteski

Texture classification is a pivotal task in computer vision, presenting unique challenges due to high inter-class similarity and the sensitivity of structural patterns to scale and illumination changes. While Convolutional Neural Networks…

计算机视觉与模式识别 · 计算机科学 2026-05-07 Joao B Florindo

Time Series Classification (TSC) has drawn a lot of attention in literature because of its broad range of applications for different domains, such as medical data mining, weather forecasting. Although TSC algorithms are designed for…

机器学习 · 计算机科学 2021-10-12 Syed Rawshon Jamil