A Multi-Modal Attention Fusion Framework for Road Connectivity Enhancement in Remote Sensing Imagery

Yongqi Yuan, Yong Cheng, Bo Pan (), Ge Jin, Yu De, Mengjie Ye and Qian Zhang
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Yongqi Yuan: School of Information Technology, Jiangsu Open University, Nanjing 210036, China
Yong Cheng: School of Information Technology, Jiangsu Open University, Nanjing 210036, China
Bo Pan: Beijing GreenValley Technology Co., Ltd., Beijing 100089, China
Ge Jin: School of Information Technology, Jiangsu Open University, Nanjing 210036, China
Yu De: School of Information Technology, Jiangsu Open University, Nanjing 210036, China
Mengjie Ye: School of Information Technology, Jiangsu Open University, Nanjing 210036, China
Qian Zhang: School of Information Technology, Jiangsu Open University, Nanjing 210036, China

Mathematics, 2025, vol. 13, issue 20, 1-20

Abstract: Ensuring the structural continuity and completeness of road networks in high-resolution remote sensing imagery remains a major challenge for current deep learning methods, especially under conditions of occlusion caused by vegetation, buildings, or shadows. To address this, we propose a novel post-processing enhancement framework that improves the connectivity and accuracy of initial road extraction results produced by any segmentation model. The method employs a dual-stream encoder architecture, which jointly processes RGB images and preliminary road masks to obtain complementary spatial and semantic information. A core component is the MAF (Multi-Modal Attention Fusion) module, designed to capture fine-grained, long-range, and cross-scale dependencies between image and mask features. This fusion leads to the restoration of fragmented road segments, the suppression of noise, and overall improvement in road completeness. Experiments on benchmark datasets (DeepGlobe and Massachusetts) demonstrate substantial gains in precision, recall, F1-score, and mIoU, confirming the framework’s effectiveness and generalization ability in real-world scenarios.

Keywords: road extraction; remote sensing; deep learning; iterative refinement (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2025
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