Objectives of the DAHLIA project

The Dahlia project aims to develop innovative signal processing methods in the following areas:

  1. advanced visualization of astronomical hyperspectral data ;
  2. 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)
  3. 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 ;
  4. source separation in dense (stellar) fields ;
  5. 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.
Topic revision: r5 - 21 Jul 2009, EricSlezak
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