Bulletin of Surveying and Mapping ›› 2022, Vol. 0 ›› Issue (9): 58-62.doi: 10.13474/j.cnki.11-2246.2022.0264

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A new and improved method for road extraction from remote sensing images by fusing different scale features

YAN Zhiheng1, REN Chao1,2, LI Yi3, XU Ninghui4, ZHANG Shengguo1   

  1. 1. College Geomatics and Geoinformation, Guilin University of Technology, Guilin 541004, China;
    2. Guangxi Key Laboratory of Spatial Information and Geomatics, Guilin 541004, China;
    3. Guangxi Zhuang Autonomous Region Natural Resources and Real Estate Registration Centre, Nanning 530000, China;
    4. Nanning Survey and Mapping Geographic Information Institute, Nanning 530000, China
  • Received:2021-10-21 Published:2022-09-30

Abstract: Aiming at the problem of inconspicuous fine road texture features and difficult information extraction in high-resolution remote sensing imagery, a new method of deep learning road extraction fusing different scale features is proposed and implemented. The method firstly introduces a CoT module to build a residual network to extract road features at different scales by making full use of local and global contextual information. Secondly, a feature pyramid attention module is built to fuse different levels of road feature information. Finally, a global attention upsampling module is used to recover road details in conjunction with the global context. The experimental results show that the proposed method is better than the existing methods in terms of recall and intersection ratio, and can extract the road information in remote sensing images more completely and accurately, which improves the efficiency of road extraction.

Key words: remote sensing image, road extraction, CoT module, feature pyramid, global attention

CLC Number: