Domain-Shared Learning and Gradual Alignment for Unsupervised Domain Adaptation Visible-Infrared Person Re-Identification

• URL: http://arxiv.org/abs/2511.16184v1
• Date: Thu, 20 Nov 2025 09:45:37 GMT
• Title: Domain-Shared Learning and Gradual Alignment for Unsupervised Domain Adaptation Visible-Infrared Person Re-Identification
• Authors: Nianchang Huang, Yi Xu, Ruida Xi, Ruida Xi, Qiang Zhang,
• Abstract summary: Visible, Visible-Infrared person Re-Identification (VI-ReID) has achieved remarkable performance on public datasets.<n>However, due to the discrepancies between public datasets and real-world data, most existing VI-ReID algorithms struggle in real-life applications.<n>We aim to transfer the knowledge learned from the public data to real-world data without compromising accuracy and requiring the annotation of new samples.
• Score: 15.508360109601973
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recently, Visible-Infrared person Re-Identification (VI-ReID) has achieved remarkable performance on public datasets. However, due to the discrepancies between public datasets and real-world data, most existing VI-ReID algorithms struggle in real-life applications. To address this, we take the initiative to investigate Unsupervised Domain Adaptation Visible-Infrared person Re-Identification (UDA-VI-ReID), aiming to transfer the knowledge learned from the public data to real-world data without compromising accuracy and requiring the annotation of new samples. Specifically, we first analyze two basic challenges in UDA-VI-ReID, i.e., inter-domain modality discrepancies and intra-domain modality discrepancies. Then, we design a novel two-stage model, i.e., Domain-Shared Learning and Gradual Alignment (DSLGA), to handle these discrepancies. In the first pre-training stage, DSLGA introduces a Domain-Shared Learning Strategy (DSLS) to mitigate ineffective pre-training caused by inter-domain modality discrepancies via exploiting shared information between the source and target domains. While, in the second fine-tuning stage, DSLGA designs a Gradual Alignment Strategy (GAS) to handle the cross-modality alignment challenges between visible and infrared data caused by the large intra-domain modality discrepancies through a cluster-to-holistic alignment way. Finally, a new UDA-VI-ReID testing method i.e., CMDA-XD, is constructed for training and testing different UDA-VI-ReID models. A large amount of experiments demonstrate that our method significantly outperforms existing domain adaptation methods for VI-ReID and even some supervised methods under various settings.

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