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Spatial-Spectral Radial Basis Function-Based Interpolation for Landsat ETM+ SLC-Off Image Gap Filling

Research output: Contribution to journalJournal articlepeer-review

Published
<mark>Journal publication date</mark>30/09/2021
<mark>Journal</mark>IEEE Transactions on Geoscience and Remote Sensing
Issue number9
Volume59
Number of pages17
Pages (from-to)7901-7917
Publication StatusPublished
Early online date9/12/20
<mark>Original language</mark>English

Abstract

The scan-line corrector (SLC) of the Landsat 7 ETM+ failed permanently in 2003, resulting in about 22% unscanned gap pixels in the SLC-off images, affecting greatly the utility of the ETM+ data. To address this issue, we propose a spatial-spectral radial basis function (SSRBF)-based interpolation method to fill gaps in SLC-off images. Different from the conventional spatial-only radial basis function (RBF) that has been widely used in other domains, SSRBF also integrates a spectral RBF to increase the accuracy of gap filling. Concurrently, global linear histogram matching is applied to alleviate the impact of potentially large differences between the known and SLC-off images in feature space, which is demonstrated mathematically in this article. SSRBF fully exploits information in the data themselves and is user-friendly. The experimental results on five groups of data sets covering different heterogeneous regions show that the proposed SSRBF method is an effective solution to gap filling, and it can produce more accurate results than six popular benchmark methods. CCBY

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©2020 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.