Abstract
Since 2003, the permanent failure of the scan line corrector (SLC) of the Landsat Enhanced Thematic Mapper Plus (ETM+) sensor has seriously limited the scientific applications and usability of ETM+ data. While a number of methods have been conducted to fill the regular un-scanned locations in ETM+ SLC-off images, only a few researches have been developed to recover the large gap areas in such images. In this study, an innovative gap filling method has been introduced to reconstruct the large gap locations in SLC-off images via multi-temporal auxiliary fill images. A correlation is established between the corresponding pixels in the target SLC-off image and two auxiliary fill images in parallel using the multiple linear regression (MLR) model in two successive steps. In the first step, almost half the gap locations have been recovered using the MLR model, then in the second step a weighted multiple linear regression (WMLR) algorithm is proposed to recover the remaining missing values. The simulated and actual case studies show that the proposed approach may provide a powerful tool for recovering the large gaps in SLC-off images, especially when there is a long time interval between the auxiliary fill images and the target SLC-off image.
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Acknowledgements
Asmaa Sadiq is grateful to the Ministry of Higher Education and Scientific Research/University of Al Mustansiriyah, Iraq for providing sponsorship to continue her PhD.
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Sadiq, A., Edwar, L. & Sulong, G. Recovering the large gaps in Landsat 7 SLC-off imagery using weighted multiple linear regression (WMLR). Arab J Geosci 10, 403 (2017). https://doi.org/10.1007/s12517-017-3121-y
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DOI: https://doi.org/10.1007/s12517-017-3121-y