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Open AccessArticle

Global 15-Meter Mosaic Derived from Simulated True-Color ASTER Imagery

1
Univ. Lille, CNRS, UMR 8518 - LOA - Laboratoire d’Optique Atmosphérique, F-59000 Lille, France
2
Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers Atomes et Molécules, F-59000 Lille, France
3
Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, 1-1-1-C7, Higashi, Tsukuba 305-8567, Japan
*
Authors to whom correspondence should be addressed.
Remote Sens. 2019, 11(4), 441; https://doi.org/10.3390/rs11040441
Received: 31 January 2019 / Revised: 16 February 2019 / Accepted: 17 February 2019 / Published: 20 February 2019
(This article belongs to the Special Issue ASTER 20th Anniversary)
This work proposes a new methodology to build an Earth-wide mosaic using high-spatial resolution (15 m) Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) images in pseudo-true color. As ASTER originally misses a blue visible band, we have designed a cloud of artificial neural networks to estimate the ASTER blue reflectance from Level-1 data acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on the same satellite Terra platform. Next, the granules are radiometrically harmonized with a novel color-balancing method and seamlessly blended into a mosaic. We demonstrate that the proposed algorithms are robust enough to process several thousands of scenes acquired under very different temporal, spatial, and atmospheric conditions. Furthermore, the created mosaic fully preserves the ASTER fine structures across the various building steps. The proposed methodology and protocol are modular so that they can easily be adapted to similar sensors with enormous image libraries. View Full-Text
Keywords: Terra ASTER; Terra MODIS; True Color imagery; Mosaic; atmospheric correction; Artificial Neural Network Terra ASTER; Terra MODIS; True Color imagery; Mosaic; atmospheric correction; Artificial Neural Network
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MDPI and ACS Style

Gonzalez, L.; Vallet, V.; Yamamoto, H. Global 15-Meter Mosaic Derived from Simulated True-Color ASTER Imagery. Remote Sens. 2019, 11, 441.

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