Prototype-Guided Structural Learning from Visual Foundation Model for Few-Shot Aerial Image Semantic Segmentation

Few-shot aerial image semantic segmentation aims to segment query images with few annotated support samples. It is challenging due to intra-class variations and complex object details in remote aeiral images. However, these two issues are inadequately addressed in existing few-shot segmentation methods. In this paper, we propose a novel Prototype-Guided structural learning (PGSL) framework based on recently proposed segment anything model (SAM). Specifically, to accommodate intra-class variation in aerial image, a novel Prototype-Guided transformer is designed to interact the multiple prototypes from support images with query images, yielding initial segmentation map. Moreover, to improve the performance on object contours, we propose a refine branch based on the SAM, which adopts initial segmentation maps as prompt. This integrates the structural knowledge inherent in SAM into our model. Experiment on iSAID-5i dataset demonstrates the proposed PGSL framework outperforms other state-of-the-art methods.