) face the problem of extracting the weak astronomical signal from the
large and rapidly variable background flux.
Ground-based astronomical observations at thermal
infrared wavelengths (
) face the problem of extracting the weak astronomical signal from the
large and rapidly variable background flux.
The observing strategy most commonly used, the so-called ``chopping and nodding'' differential technique , provides reliable representations of the target uniquely in the case of compact sources while extended and complex sources can be easily distorted by their negative counterparts.negative counterparts.
A restoration method, designed to remove the negative values and to provide reliable representations of extended sources, has been proposed by our group and validated both on simulated and real images. The restorations may be affected by artifacts, whose origin can be predicted theoretically and therefore they can be reducted.
We can show examples of the use of our restoration technique in both Galactic center and Orion nebula group of images.
Group members: