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Food classification serves as the basic step of image-based dietary assessment to predict the types of foods in each input image. However, food image predictions in a real world scenario are usually long-tail distributed among different…

计算机视觉与模式识别 · 计算机科学 2022-10-27 Jiangpeng He , Luotao Lin , Heather Eicher-Miller , Fengqing Zhu

Vanilla models for object detection and instance segmentation suffer from the heavy bias toward detecting frequent objects in the long-tailed setting. Existing methods address this issue mostly during training, e.g., by re-sampling or…

计算机视觉与模式识别 · 计算机科学 2021-12-01 Tai-Yu Pan , Cheng Zhang , Yandong Li , Hexiang Hu , Dong Xuan , Soravit Changpinyo , Boqing Gong , Wei-Lun Chao

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

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…

计算机视觉与模式识别 · 计算机科学 2022-09-27 Chaowei Fang , Lechao Cheng , Huiyan Qi , Dingwen Zhang

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…

计算机视觉与模式识别 · 计算机科学 2023-10-30 Jiang-Xin Shi , Tong Wei , Yuke Xiang , Yu-Feng Li

The conventional detectors tend to make imbalanced classification and suffer performance drop, when the distribution of the training data is severely skewed. In this paper, we propose to use the mean classification score to indicate the…

计算机视觉与模式识别 · 计算机科学 2021-08-19 Chengjian Feng , Yujie Zhong , Weilin Huang

Long-tailed instance segmentation is a challenging task due to the extreme imbalance of training samples among classes. It causes severe biases of the head classes (with majority samples) against the tailed ones. This renders "how to…

计算机视觉与模式识别 · 计算机科学 2022-04-05 Yin-Yin He , Peizhen Zhang , Xiu-Shen Wei , Xiangyu Zhang , Jian Sun

Object recognition techniques using convolutional neural networks (CNN) have achieved great success. However, state-of-the-art object detection methods still perform poorly on large vocabulary and long-tailed datasets, e.g. LVIS. In this…

计算机视觉与模式识别 · 计算机科学 2020-04-15 Jingru Tan , Changbao Wang , Buyu Li , Quanquan Li , Wanli Ouyang , Changqing Yin , Junjie Yan

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

Long-tailed (LT) classification is an unavoidable and challenging problem in the real world. Most existing long-tailed classification methods focus only on solving the class-wise imbalance while ignoring the attribute-wise imbalance. The…

计算机视觉与模式识别 · 计算机科学 2024-08-16 Jinye Yang , Ji Xu , Di Wu , Jianhang Tang , Shaobo Li , Guoyin Wang

Object detection is a task that performs position identification and label classification of objects in images or videos. The information obtained through this process plays an essential role in various tasks in the field of computer…

计算机视觉与模式识别 · 计算机科学 2023-09-06 Heewon Lee , Sangtae Ahn

The long-tailed image classification task remains important in the development of deep neural networks as it explicitly deals with large imbalances in the class frequencies of the training data. While uncommon in engineered datasets, this…

计算机视觉与模式识别 · 计算机科学 2023-07-12 Marc-Antoine Lavoie , Steven Waslander

Solving long-tail large vocabulary object detection with deep learning based models is a challenging and demanding task, which is however under-explored.In this work, we provide the first systematic analysis on the underperformance of…

计算机视觉与模式识别 · 计算机科学 2020-06-20 Yu Li , Tao Wang , Bingyi Kang , Sheng Tang , Chunfeng Wang , Jintao Li , Jiashi Feng

Conventional detection networks usually need abundant labeled training samples, while humans can learn new concepts incrementally with just a few examples. This paper focuses on a more challenging but realistic class-incremental few-shot…

计算机视觉与模式识别 · 计算机科学 2021-12-30 Pengyang Li , Yanan Li , Han Cui , Donghui Wang

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…

计算机视觉与模式识别 · 计算机科学 2024-11-15 Chen-Long Duan , Yong Li , Xiu-Shen Wei , Lin Zhao

Object detection, a pivotal task in computer vision, is frequently hindered by dataset imbalances, particularly the under-explored issue of foreground-foreground class imbalance. This lack of attention to foreground-foreground class…

计算机视觉与模式识别 · 计算机科学 2024-03-13 Nieves Crasto

Class imbalance is a common challenge in real-world recognition tasks, where the majority of classes have few samples, also known as tail classes. We address this challenge with the perspective of generalization and empirically find that…

计算机视觉与模式识别 · 计算机科学 2023-08-16 Yixuan Zhou , Yi Qu , Xing Xu , Hengtao Shen

A large portion of iris images captured in real world scenarios are poor quality due to the uncontrolled environment and the non-cooperative subject. To ensure that the recognition algorithm is not affected by low-quality images,…

图像与视频处理 · 电气工程与系统科学 2020-09-29 Leyuan Wang , Kunbo Zhang , Min Ren , Yunlong Wang , Zhenan Sun

Irregular Multivariate Time Series (IMTS) are characterized by uneven intervals between consecutive timestamps, which carry sampling pattern information valuable and informative for learning temporal and variable dependencies. In addition,…

机器学习 · 计算机科学 2026-02-26 Boyuan Li , Zhen Liu , Yicheng Luo , Qianli Ma

We propose Rank & Sort (RS) Loss, a ranking-based loss function to train deep object detection and instance segmentation methods (i.e. visual detectors). RS Loss supervises the classifier, a sub-network of these methods, to rank each…

计算机视觉与模式识别 · 计算机科学 2021-08-31 Kemal Oksuz , Baris Can Cam , Emre Akbas , Sinan Kalkan