René D. Gastaud, J.-L. Starck and M. Pierre (DAPNIA/SEI-SAP, CEA/Saclay )
The entropy measurement has been proposed for image restoration several years ago in astronomy. Different entropies have been used for this purpose. The multiscale entropy has the advantage to introduce a noise modeling, and the concept of information at different level of resolution. We show in this paper that it can also be used for background fluctuations analysis. A range of examples illustrates the results. We finally apply this method on X-ray simulations (XMM-EPIC) in order to discriminate different cosmological models.