PRISMA spatial resolution enhancement by fusion with Sentinel-2 data

Nicola Acito, Marco Diani, Giovanni Corsini
2021 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
This paper deals with the problem of improving the spatial resolution of hyperspectral data from the PRISMA mission. For this purpose, higher spatial resolution data from the Sentinel-2 (S2) mission are exploited. Particularly, the ten S2 bands at 10 m and 20 m spatial resolution are used to accomplish the PRISMA super-resolution (SR) task. The paper presents a new end-to-end procedure, called PRISMA-SR, that starting from the S2 data and the low resolution PRISMA image, provides a
more » ... image with a spatial resolution of 10 m and the same spectral resolution as the PRISMA hyperspectral sensor. The first step of the PRISMA-SR procedure consists in fusing S2 data at different spatial resolutions to obtain a synthetic MS image with 10 m spatial resolution and 10 spectral bands. Then, an unsupervised procedure is applied to co-register the fused S2 image and the PRISMA image. Finally, the two images at different spatial resolutions are properly combined in order to obtain the super-resolved hyperspectral image. Solutions for each step of the PRISMA-SR processing chain are proposed and discussed. Simulated data are used to show the effectiveness of the PRISMA-SR scheme and to investigate the impact on its performance of each step of the processing chain. Real S2 and PRISMA images are finally considered to provide an example of the application of the PRISMA-SR.
doi:10.1109/jstars.2021.3132135 fatcat:ulc4cxazyrcbxo5ht4s6bbe42m