Re: [APML] Rho Ophiuchi - Low Fat

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

that's a very beautiful image, Jason

I had similar halo problems due to a potentially defective [SII] filter.
Here's how I fixed them with photoshop:

posted to some other lists last weekend:

http://www.narrowbandimaging.com/ngc6820_s2hao3_page.htm


Basically I used the elliptical marquee to select the entire bloomed region.
then used feather to a pretty big radius (10-15 pixels), then used the
curves on the red channel to back off the gamma for that channel. Then i
selected just the stars using the same tool, feathered to 5 pixel radius,
then used the curves tool on the red channel to restore the gamma for the
star.

then i used the sponge tool with about 50% to smooth any areas in the
transition zone that had clear delineation

have a look at the before and after. Maybe I can live with this filter after
all. It didn't take long to do the fix on the entire image.

Richard


----- Original Message ----- 
From: "Jason Ware" <jtw@galaxyphoto.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Wednesday, July 28, 2004 12:57 AM
Subject: [APML] Rho Ophiuchi - Low Fat


>
> I never was much of an Atkins fan, I believe in
> low calories not low carb....I digress.
>
> I completely reworked the Rho image from a few days
> ago. I learned a LOT in the past two days and I think
> the results show.
>
> Meade 12/16" Schmidt, f2.2
> 3x10 Tech Pan
> 2x15 Fuji 100
> 1x10 E200
> Used the healing brush to remove the Schmidt halos....
>
> Enjoy....
>
> http://galaxyphoto.com/temp/jw_new_rho_meade12.jpg
>
> -- 
>  -Jason Ware
>
>  ---------------------------------------------------------
>        VISIT MY ASTROPHOTOGRAPHY HOMEPAGE!!
>     ASTRO IMAGES FOR DOWN-LOAD, TIPS, REPRINTS
>          URL: http://www.galaxyphoto.com
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