A Refined Bilateral Filter For InSAR Phase Denoising

Zhizhou Chen, Tao Sun, Zhen Wang*, Haolong Chen, Jian Zhao, Zegang Ding

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Interferometric synthetic aperture radar (InSAR) is a powerful tool for terrain mapping, which can obtain the digital elevation model(DEM) by two or more SAR images. Phase filtering technology can improve the accuracy of interferometric phase, which determines the quality of the DEM. However, the traditional phase filtering methods struggle to balance noise suppression and terrain detail preservation. To solve this problem, this paper proposes a refined bilateral filter for InSAR phase. The main contributions are summarized into two aspects. Firstly, the bilateral filtering method is extended from real domain to complex domain. It consists of spatial and value kernels, which can balance noise suppression and detail preservation. Secondly, a refined bilateral filter based on nested processing is proposed. It embeds the spatial kernel in the filtering of value kernel, which can achieve high-accuracy phase estimation. Compared to the traditional filtering methods, the proposed method can simultaneously maintain the details and suppress phase noise. Computer simulations and real airborne InSAR data validated the proposed method.

Original languageEnglish
Title of host publicationIEEE International Conference on Signal, Information and Data Processing, ICSIDP 2024
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798331515669
DOIs
Publication statusPublished - 2024
Event2nd IEEE International Conference on Signal, Information and Data Processing, ICSIDP 2024 - Zhuhai, China
Duration: 22 Nov 202424 Nov 2024

Publication series

NameIEEE International Conference on Signal, Information and Data Processing, ICSIDP 2024

Conference

Conference2nd IEEE International Conference on Signal, Information and Data Processing, ICSIDP 2024
Country/TerritoryChina
CityZhuhai
Period22/11/2424/11/24

Keywords

  • bilateral filter
  • detail preservation
  • Interferometric SAR
  • phase filtering

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