RSRefSeg 2: Decoupling Referring Remote Sensing Image Segmentation with Foundation Models

• URL: http://arxiv.org/abs/2507.06231v1
• Date: Tue, 08 Jul 2025 17:59:58 GMT
• Title: RSRefSeg 2: Decoupling Referring Remote Sensing Image Segmentation with Foundation Models
• Authors: Keyan Chen, Chenyang Liu, Bowen Chen, Jiafan Zhang, Zhengxia Zou, Zhenwei Shi,
• Abstract summary: Referring Remote Sensing Image provides a flexible and fine-grained framework for remote sensing scene analysis.<n>Current approaches utilize a three-stage pipeline encompassing dual-modal encoding, cross-modal interaction, and pixel decoding.<n>We propose RSRefSeg 2, a decoupling paradigm that reformulates the conventional workflow into a collaborative dual-stage framework.
• Score: 25.265113510539546
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Referring Remote Sensing Image Segmentation provides a flexible and fine-grained framework for remote sensing scene analysis via vision-language collaborative interpretation. Current approaches predominantly utilize a three-stage pipeline encompassing dual-modal encoding, cross-modal interaction, and pixel decoding. These methods demonstrate significant limitations in managing complex semantic relationships and achieving precise cross-modal alignment, largely due to their coupled processing mechanism that conflates target localization with boundary delineation. This architectural coupling amplifies error propagation under semantic ambiguity while restricting model generalizability and interpretability. To address these issues, we propose RSRefSeg 2, a decoupling paradigm that reformulates the conventional workflow into a collaborative dual-stage framework: coarse localization followed by fine segmentation. RSRefSeg 2 integrates CLIP's cross-modal alignment strength with SAM's segmentation generalizability through strategic foundation model collaboration. Specifically, CLIP is employed as the dual-modal encoder to activate target features within its pre-aligned semantic space and generate localization prompts. To mitigate CLIP's misactivation challenges in multi-entity scenarios described by referring texts, a cascaded second-order prompter is devised, which enhances precision through implicit reasoning via decomposition of text embeddings into complementary semantic subspaces. These optimized semantic prompts subsequently direct the SAM to generate pixel-level refined masks, thereby completing the semantic transmission pipeline. Extensive experiments (RefSegRS, RRSIS-D, and RISBench) demonstrate that RSRefSeg 2 surpasses contemporary methods in segmentation accuracy (+~3% gIoU) and complex semantic interpretation. Code is available at: https://github.com/KyanChen/RSRefSeg2.

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