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Journal of University of Chinese Academy of Sciences ›› 2024, Vol. 41 ›› Issue (1): 107-116.DOI: 10.7523/j.ucas.2022.019

• Research Articles • Previous Articles     Next Articles

An image matching algorithm combining local and semi-global geometry preservation

ZHENG Meiyan1,2, CHEN Jun1,3,4, GE Xiaoqing1, ZHANG Hong1,2   

  1. 1. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China;
    2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Computer Network Information Center, Chinese Academy of Sciences, Beijing 100083, China;
    4. School of Computer Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2022-01-13 Revised:2022-03-16 Online:2024-01-15

Abstract: Remote sensing image matching is an essential preprocessing step for many remote sensing applications. However, the distortions caused by elevation differences and the complexity of remote sensing image matching severely limit the matching precision of high-resolution remote sensing images. This paper proposes a robust feature matching algorithm suitable for local distortion and high outlier ratio. First, the Delaunay triangulation algorithm is used to impose geometric constraints on the initial matching point set, and the local adjacency relationship of the feature points is obtained. Second, pre-filter is conducted based on the adjacency information. Third, a multi-scale strategy is used to establish the local adjacency consistent model. Finally, a triangle similarity function is defined to achieve matching recovery. The experimental results on high-resolution images show that the average accuracy of our algorithm is 7.69% higher than that of RANSAC, and it is still robust when the outlier ratio is higher than 90%.

Key words: high resolution remote sensing image, image matching, Delaunay triangulation, geometry preservation, multi-scale

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