Style-Adaptive Detection Transformer for Single-Source Domain Generalized Object Detection

• URL: http://arxiv.org/abs/2504.20498v2
• Date: Fri, 25 Jul 2025 07:24:02 GMT
• Title: Style-Adaptive Detection Transformer for Single-Source Domain Generalized Object Detection
• Authors: Jianhong Han, Yupei Wang, Liang Chen,
• Abstract summary: Single-source domain generalization aims to develop a detector using only source domain data that generalizes well to unseen target domains.<n>Existing methods are primarily CNN-based and improve robustness through data augmentation combined with feature alignment.<n>We propose Style-Adaptive DEtection TRansformer (SA-DETR), a DETR-based detector tailored for single-source domain generalization.
• Score: 7.768332621617199
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Single-source domain generalization (SDG) in object detection aims to develop a detector using only source domain data that generalizes well to unseen target domains. Existing methods are primarily CNN-based and improve robustness through data augmentation combined with feature alignment. However, these methods are limited, as augmentation is only effective when the synthetic distribution approximates that of unseen domains, thus failing to ensure generalization across diverse scenarios. While DEtection TRansformer (DETR) has shown strong generalization in domain adaptation due to global context modeling, its potential for SDG remains underexplored. To this end, we propose Style-Adaptive DEtection TRansformer (SA-DETR), a DETR-based detector tailored for SDG. SA-DETR introduces an online domain style adapter that projects the style representation of unseen domains into the source domain via a dynamic memory bank. This bank self-organizes into diverse style prototypes and is continuously updated under a test-time adaptation framework, enabling effective style rectification. Additionally, we design an object-aware contrastive learning module to promote extraction of domain-invariant features. By applying gating masks that constrain contrastive learning in both spatial and semantic dimensions, this module facilitates instance-level cross-domain contrast and enhances generalization. Extensive experiments across five distinct weather scenarios demonstrate that SA-DETR consistently outperforms existing methods in both detection accuracy and domain generalization capability.

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