Re: [APML] van Cittert Deconvolution

["Bert Katzung" <katzung1@attbi.com>]

Hi Frank:
You have gotten great results with vanCittert! I had the same reaction when
I first used it:
http://www.astronomy-images.com/images/Solarsystem/waxing-moon-67percent-hir
es.htm
That image didn't look like anything much until I applied vanCittert. The
Altai scarp, for instance, was almost invisible.
For reducing noise, I  just used the Gaussian blur in Photoshop. You might
be able to get better results with SGBNR.
Bert

Bert Katzung
katzung1@attbi.com
www.astronomy-images.com

----- Original Message -----
From: "Frank Barrett" <frankb@celestialwonders.com>
To: <astro-photo@seds.org>
Sent: Saturday, March 15, 2003 1:39 PM
Subject: [APML] van Cittert Deconvolution


> 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
>
>
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
>


_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo