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Data collected from the real world typically exhibit long-tailed distributions, where frequent classes contain abundant data while rare ones have only a limited number of samples. While existing supervised learning approaches have been…

Computer Vision and Pattern Recognition · Computer Science 2023-09-18 Ci-Siang Lin , Min-Hung Chen , Yu-Chiang Frank Wang

Benchmark datasets for visual recognition assume that data is uniformly distributed, while real-world datasets obey long-tailed distribution. Current approaches handle the long-tailed problem to transform the long-tailed dataset to uniform…

Computer Vision and Pattern Recognition · Computer Science 2022-04-25 Renhui Zhang , Tiancheng Lin , Rui Zhang , Yi Xu

The variance in class-wise sample sizes within long-tailed scenarios often results in degraded performance in less frequent classes. Fortunately, foundation models, pre-trained on vast open-world datasets, demonstrate strong potential for…

Computer Vision and Pattern Recognition · Computer Science 2025-07-18 Yufei Peng , Yonggang Zhang , Yiu-ming Cheung

Recently, long-tailed image classification harvests lots of research attention, since the data distribution is long-tailed in many real-world situations. Piles of algorithms are devised to address the data imbalance problem by biasing the…

Computer Vision and Pattern Recognition · Computer Science 2023-02-06 Chaowei Fang , Dingwen Zhang , Wen Zheng , Xue Li , Le Yang , Lechao Cheng , Junwei Han

Contemporary autonomous vehicle (AV) benchmarks have advanced techniques for training 3D detectors, particularly on large-scale lidar data. Surprisingly, although semantic class labels naturally follow a long-tailed distribution,…

Computer Vision and Pattern Recognition · Computer Science 2023-05-23 Neehar Peri , Achal Dave , Deva Ramanan , Shu Kong

Holistic scene understanding is pivotal for the performance of autonomous machines. In this paper we propose a new end-to-end model for performing semantic segmentation and depth completion jointly. The vast majority of recent approaches…

Computer Vision and Pattern Recognition · Computer Science 2024-03-07 Juan Pablo Lagos , Esa Rahtu

Semantic segmentation usually suffers from a long-tail data distribution. Due to the imbalanced number of samples across categories, the features of those tail classes may get squeezed into a narrow area in the feature space. Towards a…

Computer Vision and Pattern Recognition · Computer Science 2023-06-06 Yuchao Wang , Jingjing Fei , Haochen Wang , Wei Li , Tianpeng Bao , Liwei Wu , Rui Zhao , Yujun Shen

Long-tailed semi-supervised learning (LTSSL) presents a formidable challenge where models must overcome the scarcity of tail samples while mitigating the noise from unreliable pseudo-labels. Most prior LTSSL methods are designed to train…

Machine Learning · Computer Science 2026-04-09 Zhiyuan Huang , Jiahao Chen , Bing Su

Recently, multimodal large language models (MM-LLMs) have achieved significant success in various tasks, but their high computational costs limit widespread application. The main computational burden arises from processing concatenated text…

Computer Vision and Pattern Recognition · Computer Science 2025-02-13 Gaotong Yu , Yi Chen , Jian Xu

Federated Learning (FL) enables collaborative model training across decentralized clients without sharing private data. However, FL suffers from biased global models due to non-IID and long-tail data distributions. We propose…

Machine Learning · Computer Science 2026-01-08 Jingrui Zhang , Yimeng Xu , Shujie Li , Feng Liang , Haihan Duan , Yanjie Dong , Victor C. M. Leung , Xiping Hu

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…

Computer Vision and Pattern Recognition · Computer Science 2022-09-13 Weide Liu , Zhonghua Wu , Yiming Wang , Henghui Ding , Fayao Liu , Jie Lin , Guosheng Lin

Deep learning-based models encounter challenges when processing long-tailed data in the real world. Existing solutions usually employ some balancing strategies or transfer learning to deal with the class imbalance problem, based on the…

Computer Vision and Pattern Recognition · Computer Science 2022-07-20 Changyao Tian , Wenhai Wang , Xizhou Zhu , Jifeng Dai , Yu Qiao

The training datasets used in long-tailed recognition are extremely unbalanced, resulting in significant variation in per-class accuracy across categories. Prior works mostly used average accuracy to evaluate their algorithms, which easily…

Computer Vision and Pattern Recognition · Computer Science 2024-01-31 Hao Yu , Yingxiao Du , Jianxin Wu

Semantic segmentation was seen as a challenging computer vision problem few years ago. Due to recent advancements in deep learning, relatively accurate solutions are now possible for its use in automated driving. In this paper, the semantic…

Machine Learning · Statistics 2017-08-04 Mennatullah Siam , Sara Elkerdawy , Martin Jagersand , Senthil Yogamani

Most existing object instance detection and segmentation models only work well on fairly balanced benchmarks where per-category training sample numbers are comparable, such as COCO. They tend to suffer performance drop on realistic datasets…

Computer Vision and Pattern Recognition · Computer Science 2020-11-04 Tao Wang , Yu Li , Bingyi Kang , Junnan Li , Junhao Liew , Sheng Tang , Steven Hoi , Jiashi Feng

Machine learning models fail to perform well on real-world applications when 1) the category distribution P(Y) of the training dataset suffers from long-tailed distribution and 2) the test data is drawn from different conditional…

Computer Vision and Pattern Recognition · Computer Science 2022-07-22 Xiao Gu , Yao Guo , Zeju Li , Jianing Qiu , Qi Dou , Yuxuan Liu , Benny Lo , Guang-Zhong Yang

Robust cross-seasonal localization is one of the major challenges in long-term visual navigation of autonomous vehicles. In this paper, we exploit recent advances in semantic segmentation of images, i.e., where each pixel is assigned a…

Computer Vision and Pattern Recognition · Computer Science 2018-03-05 Erik Stenborg , Carl Toft , Lars Hammarstrand

Comprehensive scene understanding is a critical enabler of robot autonomy. Semantic segmentation is one of the key scene understanding tasks which is pivotal for several robotics applications including autonomous driving, domestic service…

Robotics · Computer Science 2024-01-17 Juana Valeria Hurtado , Abhinav Valada

Camera-only 3D object detection has emerged as a cost-effective and scalable alternative to LiDAR for autonomous driving, yet existing methods primarily prioritize overall performance while overlooking the severe long-tail imbalance…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Hao Vo , Khoa Vo , Thinh Phan , Ngo Xuan Cuong , Gianfranco Doretto , Hien Nguyen , Anh Nguyen , Ngan Le

Object detection has been widely explored for class-balanced datasets such as COCO. However, real-world scenarios introduce the challenge of long-tailed distributions, where numerous categories contain only a few instances. This inherent…

Computer Vision and Pattern Recognition · Computer Science 2025-12-16 Satyam Gaba