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Previous : Reconstruction results
Conclusion and future work

A priori on the hyperparameters 

To obtain the unicity of the optimal couple 
We could estimate not only but also . Currently must be fixed, because of the existence of an infinity of local maxima of the likelihood (one for each ).
  A model with higher order derivatives
For a best quality image reconstruction
Towards a more local approach : adaptive  and  parameters
  Too global approach with only one couple  for a large size image.

 Results depend on the choice of an estimation area : see example.

André Jalobeanu - 24 Aug 1998