CLIP-HNet: Hybrid Network with Cross-Modal Guidance for Self-Supervised Remote Sensing Dehazing

摘要

Unsupervised remote sensing dehazing remains a challenging and ill-posed task due to the absence of reliable supervision signals. Existing dehazing methods with unpaired data often oversimplify haze removal as style transfer, limiting generalization in complex scenarios. Moreover, current unimodal frameworks neglect cross-modal cues that could improve contextual reasoning. To address these issues, we propose a novel cross-modal guided self-supervised dehazing framework called CLIP-HNet, which achieves multi-model feature extraction, boundary-focused reconstruction and adaptive sample filtering. Specifically, to capture global-local contextual features, a hybrid feature interaction network is designed, which bridges the feature representations of multi models with global context-aware module (GCAM) and hybrid feature fusion module (HF2 M). Then, based on the hybrid features, a boundary-aware feature reconstruction (BFRec) is proposed to further refine edge details. Furthermore, a CLIP-guided progressive information distillation scheme is presented to dynamically prioritize training samples and distill useful signals, which predicts haze concentration by CLIP and progressively increases sample difficulty during the training stage. Finally, a frequency-domain texture matching (FTM) strategy refines texture and spectral details, enhancing the model's ability to recover fine details. Experiments on synthetic and real RSIs demonstrate that the proposed CLIP-HNet surpasses state-of-the-art approaches, achieving superior visual quality and quantitative performance.