RE: [APML] IC443

[Glenn Ray <Glenn.Ray@aspentech.com>]

An alternative to Matt BenDaniel's suggestion (using an elliptical marquee
to mask out the star) would be to use the Magic Wand tool in Photoshop to
select the bright star/halo.  You might choose a tolerance of 16-32 and then
use the "Select, Grow.." feature until a satisfactory selection is visible.
Then you'd feather the selection (2-5 pixels); invert the selection (to
select everything BUT the star/halo) and then adjust your levels on the
remainder.

I experimented with your on-line image and was able to boost the nebulosity
by about 15-20 units without significant blooming to the star while keeping
the background close to neutral.

Glenn Ray
Cypress, Texas


-----Original Message-----
From: DPMESSIER@aol.com [mailto:DPMESSIER@aol.com]
Sent: Tuesday, February 05, 2002 1:32 PM
To: astro-photo@seds.org
Subject: [APML] IC443


Hello all,

I'm trying to process an image of IC443 and have a problem with a bright
star 
in the frame.  Is there any way to bring out the fainter parts of the image 
without also exaggerating the halo around the bright star?  

                         http://www.geocities.com/dpmessier/ic443.htm

Thanks for any help.    

David P. Messier
Web site>     http://www.geocities.com/dpmessier
E-mail>    dpmessier@aol.com

--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>

--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>