Re: [APML] OT: Lunar Mosaic

[Juan Conejero <skycad@ctv.es>]

Frank,

Thank you very much. Your mosaic is wonderful; a very beautiful lunar image 
which I've enjoyed very much. You have executed the mosaic with extreme 
perfection; I'll take into account your recommendations next time.

Indeed I think your image would benefit a lot from deconvolution; I've 
found the Van Cittert's algorithm ideal for lunar work. What I would like 
to improve is noise propagation and certain artifacts which occur near high 
contrast edges. Anyway, I'm very happy with our current results.

There is a substantial deal of information on the WWW on deconvolution. Try 
typing "deconvolution", "Richardson-Lucy", or "Van Cittert" in Google. The 
following site includes very interesting links:

http://telin.rug.ac.be/~frooms/

Go to the section "Links about computers and image processing".

Best regards,
______________________________________
Juan Conejero, Pleiades Astrophoto
skycad@ctv.es
http://www.pleiades-astrophoto.com/en.html

At 08:51 14/03/2003 -0500, you wrote:
>Juan,
>
>Your work totally blows mine away, so I feel a bit awkward replying <g>.
>The *only* thing I find detracting in your excellent image are presence of
>the seams which are furthur enchanced by the deconvulution.  I find it
>best to adjust the brightness levels of the individual segments and patch
>up any remaining seams before applying sharpening techniques.  The other
>technique I've found useful when combining multiple frames for mosaics is
>to crop the resultant segment slightly to remove edge noise inherent when
>not all frames are completely aligned.  Anywho, you probably know this
>already.
>
>I don't see how, but if you find a way to improve the deconvolution I
>would sure like to know how you do it.  This is one area where I really
>need to learn more.  Does anyone know of any web or other resources that
>discuss this subject matter?
>
>FWIW, here's my latest attempt at a lunar mosaic, though it doesn't hold a
>candle to your work, it is the best I've been able to accomplish so far.
>It's a 25 frame mosaic at f/6 on a C8 on a night with relatively good
>seeing:
>
>http://celestialwonders.com/FirstQuarterMosaic.html
>
>--
>Frank Barrett
>frankb@celestialwonders.com
>http://celestialwonders.com


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