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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

Deep learning enables impressive performance in image recognition using large-scale artificially-balanced datasets. However, real-world datasets exhibit highly class-imbalanced distributions, yielding two main challenges: relative imbalance…

Computer Vision and Pattern Recognition · Computer Science 2020-10-20 Saurabh Sharma , Ning Yu , Mario Fritz , Bernt Schiele

Predicting the future trajectories of the traffic agents is a gordian technique in autonomous driving. However, trajectory prediction suffers from data imbalance in the prevalent datasets, and the tailed data is often more complicated and…

Computer Vision and Pattern Recognition · Computer Science 2023-03-30 Yuning Wang , Pu Zhang , Lei Bai , Jianru Xue

Imbalanced classification datasets pose significant challenges in machine learning, often leading to biased models that perform poorly on underrepresented classes. With the rise of foundation models, recent research has focused on the full,…

Machine Learning · Computer Science 2025-09-22 Nakul Sharma

User response prediction, which models the user preference w.r.t. the presented items, plays a key role in online services. With two-decade rapid development, nowadays the cumulated user behavior sequences on mature Internet service…

Information Retrieval · Computer Science 2019-05-14 Kan Ren , Jiarui Qin , Yuchen Fang , Weinan Zhang , Lei Zheng , Weijie Bian , Guorui Zhou , Jian Xu , Yong Yu , Xiaoqiang Zhu , Kun Gai

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

Classification on long-tailed distributed data is a challenging problem, which suffers from serious class-imbalance and hence poor performance on tail classes with only a few samples. Owing to this paucity of samples, learning on the tail…

Computation and Language · Computer Science 2022-07-25 Taha ValizadehAslani , Yiwen Shi , Jing Wang , Ping Ren , Yi Zhang , Meng Hu , Liang Zhao , Hualou Liang

Owing to their remarkable learning (and relearning) capabilities, deep neural networks (DNNs) find use in numerous real-world applications. However, the learning of these data-driven machine learning models is generally as good as the data…

Machine Learning · Computer Science 2023-04-04 Mahum Naseer , Muhammad Shafique

It is well-known that deep learning models are vulnerable to adversarial examples. Existing studies of adversarial training have made great progress against this challenge. As a typical trait, they often assume that the class distribution…

Machine Learning · Computer Science 2022-06-27 Wenzheng Hou , Qianqian Xu , Zhiyong Yang , Shilong Bao , Yuan He , Qingming Huang

Deep neural networks are vulnerable to adversarial attacks, often leading to erroneous outputs. Adversarial training has been recognized as one of the most effective methods to counter such attacks. However, existing adversarial training…

Computer Vision and Pattern Recognition · Computer Science 2024-03-18 Xinli Yue , Ningping Mou , Qian Wang , Lingchen Zhao

While generalist robot policies hold significant promise for learning diverse manipulation skills through imitation, their performance is often hindered by the long-tail distribution of training demonstrations. Policies learned on such…

Robotics · Computer Science 2026-02-09 Junhong Zhu , Ji Zhang , Jingkuan Song , Lianli Gao , Heng Tao Shen

One crucial challenge of real-world multilingual speech recognition is the long-tailed distribution problem, where some resource-rich languages like English have abundant training data, but a long tail of low-resource languages have varying…

Computation and Language · Computer Science 2020-12-04 Genta Indra Winata , Guangsen Wang , Caiming Xiong , Steven Hoi

Significant effort has been recently devoted to modeling visual relations. This has mostly addressed the design of architectures, typically by adding parameters and increasing model complexity. However, visual relation learning is a…

Computer Vision and Pattern Recognition · Computer Science 2021-08-24 Alakh Desai , Tz-Ying Wu , Subarna Tripathi , Nuno Vasconcelos

Long-tail recommendation in real-world e-commerce platforms remains challenging due to severe data imbalance. Existing methods often struggle to combine content-based multimodal features with collaborative signals. Many of these methods…

Information Retrieval · Computer Science 2026-05-25 Chenyi Yan , Ruocong Tang , Xing Fang , Yang Huang , He Guo , Jing Wang

Person search unifies person detection and person re-identification (Re-ID) to locate query persons from the panoramic gallery images. One major challenge comes from the imbalanced long-tail person identity distributions, which prevents the…

Computer Vision and Pattern Recognition · Computer Science 2021-12-02 Chuang Liu , Hua Yang , Qin Zhou , Shibao Zheng

We consider the problem of sequential recommendation, where the current recommendation is made based on past interactions. This recommendation task requires efficient processing of the sequential data and aims to provide recommendations…

Information Retrieval · Computer Science 2023-07-28 Xumei Xi , Yuke Zhao , Quan Liu , Liwen Ouyang , Yang Wu

Attention-based sequential recommendation methods have shown promise in accurately capturing users' evolving interests from their past interactions. Recent research has also explored the integration of reinforcement learning (RL) into these…

Machine Learning · Computer Science 2024-04-19 Melissa Mozifian , Tristan Sylvain , Dave Evans , Lili Meng

Long-sequence modeling has become an indispensable frontier in recommendation systems for capturing users' long-term preferences. However, user behaviors within advertising domains are inherently sparse, posing a significant barrier to…

Modeling user preferences (long-term history) and user dynamics (short-term history) is of greatest importance to build efficient sequential recommender systems. The challenge lies in the successful combination of the whole user's history…

Machine Learning · Computer Science 2021-03-31 Corentin Lonjarret , Roch Auburtin , Céline Robardet , Marc Plantevit

Long-tail learning has received significant attention in recent years due to the challenge it poses with extremely imbalanced datasets. In these datasets, only a few classes (known as the head classes) have an adequate number of training…

Computer Vision and Pattern Recognition · Computer Science 2023-10-30 Jiang-Xin Shi , Tong Wei , Yuke Xiang , Yu-Feng Li