Federated Joint Learning for Domain and Class Generalization

Fuente: arXiv
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Autori principali: Xu, Haoran, Li, Jiaze, Ju, Jianzhong, Luo, Zhenbo
Natura: Preprint
Pubblicazione: 2026
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author Xu, Haoran
Li, Jiaze
Ju, Jianzhong
Luo, Zhenbo
author_facet Xu, Haoran
Li, Jiaze
Ju, Jianzhong
Luo, Zhenbo
contents Efficient fine-tuning of visual-language models like CLIP has become crucial due to their large-scale parameter size and extensive pretraining requirements. Existing methods typically address either the issue of unseen classes or unseen domains in isolation, without considering a joint framework for both. In this paper, we propose \textbf{Fed}erated Joint Learning for \textbf{D}omain and \textbf{C}lass \textbf{G}eneralization, termed \textbf{FedDCG}, a novel approach that addresses both class and domain generalization in federated learning settings. Our method introduces a domain grouping strategy where class-generalized networks are trained within each group to prevent decision boundary confusion. During inference, we aggregate class-generalized results based on domain similarity, effectively integrating knowledge from both class and domain generalization. Specifically, a learnable network is employed to enhance class generalization capabilities, and a decoupling mechanism separates general and domain-specific knowledge, improving generalization to unseen domains. Extensive experiments across various datasets show that \textbf{FedDCG} outperforms state-of-the-art baselines in terms of accuracy and robustness.
format Preprint
id arxiv_https___arxiv_org_abs_2601_12253
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Federated Joint Learning for Domain and Class Generalization
Xu, Haoran
Li, Jiaze
Ju, Jianzhong
Luo, Zhenbo
Computer Vision and Pattern Recognition
Machine Learning
Efficient fine-tuning of visual-language models like CLIP has become crucial due to their large-scale parameter size and extensive pretraining requirements. Existing methods typically address either the issue of unseen classes or unseen domains in isolation, without considering a joint framework for both. In this paper, we propose \textbf{Fed}erated Joint Learning for \textbf{D}omain and \textbf{C}lass \textbf{G}eneralization, termed \textbf{FedDCG}, a novel approach that addresses both class and domain generalization in federated learning settings. Our method introduces a domain grouping strategy where class-generalized networks are trained within each group to prevent decision boundary confusion. During inference, we aggregate class-generalized results based on domain similarity, effectively integrating knowledge from both class and domain generalization. Specifically, a learnable network is employed to enhance class generalization capabilities, and a decoupling mechanism separates general and domain-specific knowledge, improving generalization to unseen domains. Extensive experiments across various datasets show that \textbf{FedDCG} outperforms state-of-the-art baselines in terms of accuracy and robustness.
title Federated Joint Learning for Domain and Class Generalization
topic Computer Vision and Pattern Recognition
Machine Learning
url https://arxiv.org/abs/2601.12253