Towards real-time processing for UAV-mounted GPR-SAR imaging systems

María García-Fernández*, Guillermo Álvarez-Narciandi, Jaime Laviada, Yuri Álvarez López, Fernando Las-Heras

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
73 Downloads (Pure)

Abstract

Ground Penetrating Radar (GPR) systems mounted on Unmanned Aerial Vehicles (UAVs) are becoming a promising solution to inspect beneath the soil surface. In particular, resorting to Synthetic Aperture Radar (SAR) techniques, these systems are able to retrieve subsurface radar images, in which buried targets can be detected. However, one of the major bottlenecks of this technology is the significant amount of time required for computing the radar images (due to the usage of computationally expensive algorithms to handle non-regular acquisition domains). To face this challenge, this work proposes an efficient interpolation approach, combining a height shift operation with a 2D interpolation, that enables the adoption of a migration algorithm called Phase Shift Migration (PSM). As a result, the processing time is drastically improved, offering close to real-time operation. The proposed methodology has been validated in a realistic scenario for detecting buried explosive targets, comparing it with conventional backprojection techniques in terms of image quality and processing time.

Original languageEnglish
Pages (from-to)1-12
Number of pages12
JournalISPRS Journal of Photogrammetry and Remote Sensing
Volume212
Early online date27 Apr 2024
DOIs
Publication statusPublished - Jun 2024

Keywords

  • real-time processing
  • UAV-mounted
  • GPR-SAR
  • imaging systems

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