Increasing the spatial resolution of gridded data by fusion with other data sets

Lucien Wald (1) , Thierry Ranchin (2) , Mireille Lefèvre (1) , Michel Albuisson (2) , Jan Remund (3)

1 CEP/Sophia
2 CEP - Centre Énergétique et Procédés
3 Meteotest

A method is proposed for increasing the spatial resolution of gridded data with a special emphasis in climatology. Given a set of gridded data at low spatial resolution, and assuming the existence of other data sets at better resolutions, the method takes advantage of these additional information. It extracts the high frequencies from the other sets, infers the searched high frequencies from these and performs a synthesis of the initial data at the better resolution available in the data sets. The method is explained in the general case. An application is performed that aims at synthesizing worldwide maps of climatological values of the atmospheric optical turbidity at a resolution of 5', starting from an initial resolution of 160' of arc angle.

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Lucien Wald, Thierry Ranchin, Mireille Lefèvre, Michel Albuisson, Jan Remund. Increasing the spatial resolution of gridded data by fusion with other data sets. 6th International Conference on Information Fusion, Jul 2003, Cairns, Australia. pp.168-173. ⟨hal-00395028⟩