The image processing research must be done in collaboration with the VISTA project. This is already the case through the ACI Assimage (Assimilation of image data within geophysical models) leaded by F.-X. Le Dimet. The partners are: IDOPT and VISTA INRIA projects, AEROBIO, ETNA and ENGREF CEMAGREF teams, and LEGI (Laboratoire de Ecoulements Géophysiques et Industriels) and LGGE (Laboratoire de Glaciologie et Géophysique de l'Environnement) CNRS laboratories.