Few-Shot Oriented Object Detection in Remote Sensing Images via Memorable Contrastive Learning

Few-shot object detection (FSOD) has attracted significant research attention in remote sensing due to its potential to reduce reliance on large annotated datasets. However, two challenges remain in this area: 1) axis-aligned proposals, which can result in misalignment for arbitrarily oriented objects and 2) object misclassification due to limited annotated data, which hinders generalization to unseen classes. To address these issues, we propose a novel method for few-shot oriented object detection (FSOOD) in remote sensing images. Our approach employs oriented bounding boxes (OBBs) instead of horizontal ones to learn more effective feature representations for arbitrarily oriented aerial objects, enhancing detection accuracy. Additionally, we introduce a supervised contrastive learning module with a dynamically updated memory bank, enabling the model to leverage large batches of negative samples and to better learn discriminative features for unseen classes. Extensive experiments on DOTA, HRSC2016, and DIOR-R datasets demonstrate superior performance of our proposed method in FSOOD. Code and pretrained models are publicly available at https://github.com/BriFuture/fomc.