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CHEN Yanming, ZHANG Fan, HE Min, et al. Matching method for airborne and simulated synthetic aperture radar images based on local fitting consistency[J]. Journal of Radars, in press. doi: 10.12000/JR26027
Citation: CHEN Yanming, ZHANG Fan, HE Min, et al. Matching method for airborne and simulated synthetic aperture radar images based on local fitting consistency[J]. Journal of Radars, in press. doi: 10.12000/JR26027
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Matching Method for Airborne and Simulated Synthetic Aperture Radar Images Based on Local Fitting Consistency

DOI: 10.12000/JR26027 CSTR: 32380.14.JR26027
  • 1.

    School of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China

  • 2.

    Beijing Institute of Remote Sensing Equipment, Beijing 100854, China

  • 3.

    China Academy of Space Technology, Beijing 100094, China

  • 4.

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China

Funds:  Open Foundation for National Key Laboratory of Microwave Imaging
More Information
  • Corresponding author: HE Min, hemindreams@sina.com
  • Received Date: 2026-01-21
  • Rev Recd Date: 2026-03-12
    • Available Online: 2026-03-13
    Abstract
  • Variations in imaging geometry are the main cause of relative feature distortion in Synthetic Aperture Radar (SAR) images, greatly increasing the difficulty of image matching. Using simulated SAR images as references can remove the feature distortions caused by geometric differences. However, significant differences in scattering characteristics and noise patterns between measured and simulated images still exist. Additionally, since most existing matching algorithms mainly rely on symmetric keypoint detection and descriptor matching, the number and precision of matched points are not optimal. To solve these problems, this paper introduces an asymmetric Local Fitting Consistency (LFC) similarity metric based on the local statistical features of both measured and simulated SAR images. Using this metric, a coarse-to-fine matching framework for airborne and simulated SAR images is designed. Furthermore, terrain features are added to improve keypoint detection diversity, leading to more robust matching between airborne and simulated SAR images. Experimental results show that the proposed LFC-based matching method offers better robustness and accuracy compared to other approaches, significantly surpassing current state-of-the-art algorithms in terms of matching precision and other key metrics.

     

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