[APML] van Cittert Deconvolution

["Frank Barrett" <frankb@celestialwonders.com>]

If this is slightly off topic, please forgive me this one indiscretion.
There seemed to be some recent interest in deconvolution so I thought I
would share some of my early results with this technique.  It's very
exciting.

After seeing Juan's wonderful mosaic yesterday I went home and cracked open
a recently acquired book "The Handbook of Astronomical Image Processing"
which comes with the AIP4WIN software.  In it I learned of the magic of
deconvolution and was pleased to find that the software contains the van
Cittert algorithm.  I experimented with this on my first quarter mosaic and
found that it did crisp things up a bit, but if I went "too" far it seemed
to bring out a lot of noise in the darker regions.  Anyone know how to
mitigate this?

http://celestialwonders.com/FirstQuarterMosaic.html

I also took the opportunity to process a four frame mosaic of the Plato
crater region taken at f/20.  Each individual frame is a median combine of
12 of the best out of 20 frames.  With this I was able to go 250 iterations
with van Cittert deconvolution.  The results just blew me away!  It's liked
I've discovered a whole new dimension to this hobby!  The page contains the
raw convoluted image as well as the processed image for comparison.

http://celestialwonders.com/Plato.html

Comments welcome!
-----
Frank Barrett
http://celestialwonders.com


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