The development of Adaptive Optics Systems (AOS), which correct
for the degrading effect of atmospheric turbulence, has enhanced
the resolution of ground-based telescopes. Thanks to this
technological achievement, the design and the construction of a
number of very large telescopes is in progress. However the
correction provided by AOS is never complete and, in addition,
interferometric methods may be used for further enhancing the
resolution. As a consequence a postprocessing of the images, based
on the solution of a deconvolution problem, may be required.
Specific features of the astronomical images, such as their
high dynamic range (for instance, order of magnitudes between
the intensity of a star and that of the sorrounding ring) imply that
the standard image restoration methods may not be
sufficiently accurate. The challenging problems generated by
this kind of astronomical objects are discussed and possible
approaches to their solution are presented. Moreover the improvement
of telescope resolution obtainable by means of restoration methods is
discussed.
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