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Representation learning has been widely studied in the context of meta-learning, enabling rapid learning of new tasks through shared representations. Recent works such as MAML have explored using fine-tuning-based metrics, which measure the…

Machine Learning · Computer Science 2021-05-06 Kurtland Chua , Qi Lei , Jason D. Lee

To bridge the gap between the source and target domains in unsupervised domain adaptation (UDA), the most common strategy puts focus on matching the marginal distributions in the feature space through adversarial learning. However, such…

Computer Vision and Pattern Recognition · Computer Science 2022-01-19 Zhizhe Liu , Zhenfeng Zhu , Shuai Zheng , Yang Liu , Jiayu Zhou , Yao Zhao

Deep neural networks frequently suffer from performance degradation when the training data is long-tailed because several majority classes dominate the training, resulting in a biased model. Recent studies have made a great effort in…

Computer Vision and Pattern Recognition · Computer Science 2023-05-19 Mengke Li , Yiu-ming Cheung , Juyong Jiang

Real-world data often have a long-tailed distribution, where the number of samples per class is not equal over training classes. The imbalanced data form a biased feature space, which deteriorates the performance of the recognition model.…

Computer Vision and Pattern Recognition · Computer Science 2022-11-23 Minki Jeong , Changick Kim

For long-tailed classification, most works often pretrain a big model on a large-scale dataset, and then fine-tune the whole model for adapting to long-tailed data. Though promising, fine-tuning the whole pretrained model tends to suffer…

Computer Vision and Pattern Recognition · Computer Science 2023-03-29 Bowen Dong , Pan Zhou , Shuicheng Yan , Wangmeng Zuo

Deep neural networks (DNNs) are often prone to learn the spurious correlations between target classes and bias attributes, like gender and race, inherent in a major portion of training data (bias-aligned samples), thus showing unfair…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Mei Wang , Weihong Deng , Jiani Hu , Sen Su

Real-world data usually couples the label ambiguity and heavy imbalance, challenging the algorithmic robustness of partial label learning (PLL) and long-tailed learning (LT). The straightforward combination of LT and PLL, i.e., LT-PLL,…

Machine Learning · Computer Science 2023-02-13 Feng Hong , Jiangchao Yao , Zhihan Zhou , Ya Zhang , Yanfeng Wang

The most existing studies in the facial age estimation assume training and test images are captured under similar shooting conditions. However, this is rarely valid in real-world applications, where training and test sets usually have…

Computer Vision and Pattern Recognition · Computer Science 2020-10-28 Ali Akbari , Muhammad Awais , Zhen-Hua Feng , Ammarah Farooq , Josef Kittler

Deep neural networks still struggle on long-tailed image datasets, and one of the reasons is that the imbalance of training data across categories leads to the imbalance of trained model parameters. Motivated by the empirical findings that…

Computer Vision and Pattern Recognition · Computer Science 2022-12-06 Haoxuan Wang , Junchi Yan

Accurate estimation of postmenstrual age (PMA) at scan is crucial for assessing neonatal development and health. While deep learning models have achieved high accuracy in predicting PMA from brain MRI, they often function as black boxes,…

Artificial Intelligence · Computer Science 2025-08-05 Qifan Chen , Jin Cui , Cindy Duan , Yushuo Han , Yifei Shi

Voice biometric tasks, such as age estimation require modeling the often complex relationship between voice features and the biometric variable. While deep learning models can handle such complexity, they typically require large amounts of…

Machine Learning · Computer Science 2025-01-29 Dareen Alharthi , Mahsa Zamani , Bhiksha Raj , Rita Singh

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…

Computer Vision and Pattern Recognition · Computer Science 2023-07-12 Marc-Antoine Lavoie , Steven Waslander

Longitudinal brain analysis is essential for understanding healthy aging and identifying pathological deviations. Longitudinal registration of sequential brain MRI underpins such analyses. However, existing methods are limited by reliance…

Image and Video Processing · Electrical Eng. & Systems 2026-03-31 Bailiang Jian , Jiazhen Pan , Yitong Li , Fabian Bongratz , Ruochen Li , Daniel Rueckert , Benedikt Wiestler , Christian Wachinger

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…

Computer Vision and Pattern Recognition · Computer Science 2024-08-16 Jinye Yang , Ji Xu , Di Wu , Jianhang Tang , Shaobo Li , Guoyin Wang

In this paper, we propose a new max-margin based discriminative feature learning method. Specifically, we aim at learning a low-dimensional feature representation, so as to maximize the global margin of the data and make the samples from…

Machine Learning · Computer Science 2017-04-04 Changsheng Li , Qingshan Liu , Weishan Dong , Xin Zhang , Lin Yang

Deep learning algorithms can fare poorly when the training dataset suffers from heavy class-imbalance but the testing criterion requires good generalization on less frequent classes. We design two novel methods to improve performance in…

Machine Learning · Computer Science 2019-10-29 Kaidi Cao , Colin Wei , Adrien Gaidon , Nikos Arechiga , Tengyu Ma

Few-shot learning (FSL) has attracted increasing attention in recent years but remains challenging, due to the intrinsic difficulty in learning to generalize from a few examples. This paper proposes an adaptive margin principle to improve…

Computer Vision and Pattern Recognition · Computer Science 2020-05-29 Aoxue Li , Weiran Huang , Xu Lan , Jiashi Feng , Zhenguo Li , Liwei Wang

The long-tailed recognition (LTR) is the task of learning high-performance classifiers given extremely imbalanced training samples between categories. Most of the existing works address the problem by either enhancing the features of tail…

Computer Vision and Pattern Recognition · Computer Science 2023-04-12 Haixu Long , Xiaolin Zhang , Yanbin Liu , Zongtai Luo , Jianbo Liu

In ordinal classification, misclassifying neighboring ranks is common, yet the consequences of these errors are not the same. For example, misclassifying benign tumor categories is less consequential, compared to an error at the…

Computer Vision and Pattern Recognition · Computer Science 2026-01-13 Dileepa Pitawela , Gustavo Carneiro , Hsiang-Ting Chen

We consider the problem of online multiclass classification with partial feedback, where an algorithm predicts a class for a new instance in each round and only receives its correctness. Although several methods have been developed for this…

Machine Learning · Computer Science 2019-02-05 Takuo Kaneko , Issei Sato , Masashi Sugiyama