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RSS FeedsRemote Sensing, Vol. 11, Pages 441: Global 15-Meter Mosaic Derived from Simulated True-Color ASTER Imagery (Remote Sensing)

 
 

20 february 2019 21:00:53

 
Remote Sensing, Vol. 11, Pages 441: Global 15-Meter Mosaic Derived from Simulated True-Color ASTER Imagery (Remote Sensing)
 


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.


 
87 viewsCategory: Geology, Physics
 
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