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[APML] Median filter question (Was:IC5146 uploaded; suggestions?)

--- 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.

Can anyone walk me through the steps for doing this? Is this one of
those things where you make, and work on a separate layer?

Thanks,
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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