The Dahlia project aims to develop innovative signal processing methods in the following areas:
advanced visualization of astronomical hyperspectral data ;
optimal (and sequential) fusion of hyperspectral data for increasing the field of view (mosaicing) or improving the S/N (co-addition) including a proper handling of the noise properties (using probabilistic and inverse problem approaches)
hyperspectral deconvolution taking into account a (partially known) PSF which is a function of the location within the field, depends on the wavelength (a factor 2 from the blue to the red) and changes with time : none of the currently available methods is efficient in such a context ;
source separation in dense (stellar) fields ;
unsupervised source detection in deep fields whatever their characteristics are : extended or PSF-like objects, with or without a spectral continuum, etc.
To achieve these ambitious goals a multi-disciplinary experienced group of IT scientists and astrophysicists from 4 institutes in France has been gathered.