Re: [APML] IC5146 uploaded; suggestions?

["Richard Crisp" <rdcrisp@earthlink.net>]

if I have fat haloes I usually fix in photoshop by editing only the 
offending layer, using either "select highlights" or use the magic wand, 
then under the select/modify command, expand the selection box by two or 
three pixels, feather maybe two pixels and then use the 
Filters/Other/Minimum and use a radius of 1

that works pretty well for globally shrinking the haloes


----- Original Message ----- 
From: "Alan Voetsch" <alanv12952@yahoo.com>
To: <glennlray@mail.ev1.net>; "Discussion of Film Astrophotography" 
<astro-photo@seds.org>
Sent: Wednesday, July 20, 2005 2:50 PM
Subject: Re: [APML] IC5146 uploaded; suggestions?


> Hey Glenn,
>
> --- Glenn Ray <glennlray@mail.ev1.net> wrote:
>> Hi Alan...I would suggest using a median filter on the red
>> channel...stars only.  At high resolution, many of the stars have
>> red rings around them and I think a filter might tighten them up
>> some.
>> >> http://www.pbase.com/image/34306024
>
> Yes, horrible red rings. When I get time I'll give the technique you
> suggest a try. It'll be a first for me so some experimentation will be
> in order. Better make sure I work on a duplicate. 8-)
>
> Thanks Glenn,
> Alan
>
>
>
> SCT Astrophotography: http://www.pbase.com/avoetsch/astrophotography
> FS-102 G-11/Gemini: http://www.pbase.com/avoetsch12952/tak_fs102
> & http://www.pbase.com/avoetsch12952/fs102
> & http://www.pbase.com/avoetsch12952/takpf
>
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