Systems Engineering and Electronics ›› 2025, Vol. 47 ›› Issue (2): 428-441.doi: 10.12305/j.issn.1001-506X.2025.02.10

• Sensors and Signal Processing • Previous Articles    

Fast registration of optical and SAR images based on image structural information

Leilei JIA1, Limin LIU1,*, Jian DONG2   

  1. 1. Department of Electronic and Optical Engineering, Army Engineering University Shijiazhuang Campus, Shijiazhuang 050003, China
    2. School of Integrated Circuits and Electronics, Beijing Institute of Technology, Beijing 100081, China
  • Received:2023-12-22 Online:2025-02-25 Published:2025-03-18
  • Contact: Limin LIU

Abstract:

To address the problem of geometric differences, radiometric differences, and speckle noise in the registration process of the images of visible light and synthetic aperture radar (SAR), a fast registration algorithm for optical and SAR images based on image structure information is proposed. Firstly, a Gaussian scale space is established and an image self-similarity orientation map is constructed by using offset mean filtering and bilinear interpolation. Then, characteristic points detection for features from accelerated segment test (FAST) is performed on the maximum and minimum self-similarity maps to obtain corner and edge features. Furthermore, based on the minimum self-similarity index map and equal area strategy, descriptors are constructed, and multi-orientation conversion method and batch generation method for descriptors are proposed. Finally, the nearest-neighbor distance ratio (NNDR) algorithm and the fast sample consensus (FSC) algorithm are performed to identify correct matches. The experimental results show that the proposed algorithm has significant advantages in visible optical and SAR image registration.

Key words: visible optical and synthetic aperture radar (SAR) image registration, structural information, multi-orientation conversion, batch generation

CLC Number: 

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