Reweighting balanced representation learning for long tailed image recognition in multiple domains

Abstract In multi-domain long-tailed learning, data imbalance appears in two ways: within-domain class imbalance and across-domain sample proportion variation. These imbalances introduce biases in covariates and representations when learning domain-invariant features in both input and latent spaces....

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Bibliographic Details
Main Authors: Panpan Fu, Nur Intan Raihana Ruhaiyem, Jiangtao Wang
Format: Article
Language:English
Published: Nature Portfolio 2025-07-01
Series:Scientific Reports
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Online Access:https://doi.org/10.1038/s41598-025-03459-w
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Summary:Abstract In multi-domain long-tailed learning, data imbalance appears in two ways: within-domain class imbalance and across-domain sample proportion variation. These imbalances introduce biases in covariates and representations when learning domain-invariant features in both input and latent spaces. This paper applies an advanced reweighting balanced representation learning (BRL) algorithm to multi-domain long-tailed image recognition. By integrating covariate and representation balancing techniques into a reweighting-based class balancing approach, BRL effectively addresses these biases. Extensive evaluation on six benchmark datasets confirms its ability to extract domain- and class-unbiased feature representations, leading to excellent classifier performance, especially for the hardest classes. This approach also shows potential for applications in areas such as environmental monitoring and medical imaging, providing a robust solution with broad scientific implications.
ISSN:2045-2322