Re: [APML] Processing Challenge: LMC

[stephen pitt <lthuedk@pe.net>]

Fantastic, John.  The way you managed to bring up the bluish (O2?) cloud
while maintaining the H-a red is beautifully and conservatively done. 
There's enough surrounding field to read flat and lend to a balance of
the two subject temperatures.  Really, a very inviting picture. 

Matt's base image was chucked with goodies for the imagination.

Stephen


John Boudreau wrote:
> 
> Here's my attempt:
> http://home.attbi.com/~jeboud/apml.htm
> 
> The uneven fogging of the film is a pain. I'm just not sure if there's real
> nebulosity in some sections or if just fog--- or a combination of both. This
> image is really subject to a lot of different interpretations. I don't think
> I'd do it quite the same twice. As a learning tool to share processing steps
> with others, this image has too many issues IMHO.
> 
> Since the uneven fogging caused me to make so many steps besides just AV,
> it's tough to describe what I did in detail. Making an AV mask, grabbing fog
> spots with the lasso tool for localized curve corrections, Mike Cook's star
> erosion technique, and just plain 'ol fiddling with curves were done in PS6.
> 
> I'm still in the early stages of learning SGBNR, and used the channels set
> to AUTO and a filter radius of .75, and the Global Filter Order set to .90
> with the truncation set near mid-point (truncation setting didn't effect it
> noticeably). All other tools were off.
> 
> The image was then mildly unsharp masked in MaxIm DL.
> 
> Time for a beer. <g>
> 
> John Boudreau
> jeboud@attbi.com
> http://home.attbi.com/~jeboud/astro.htm
> 
> ----- Original Message -----
> From: "Matt BenDaniel" <matt@starmatt.com>
> To: <astro-photo@seds.org>
> Sent: Tuesday, May 14, 2002 9:39 PM
> Subject: [APML] Processing Challenge: LMC
> 
> > Below is a URL to an unprocessed 8.5MB TIFF of the Large Magellanic Cloud.
> Also below is a link to a processed version of the image. I chose this image
> because I could not make it look as nice as I want. I am hoping that y'all
> will show me a thing or two with it. That said, this is a difficult image.
> It has major vignetting and red fogging (probably from film age and or
> humidity). If you're new to image processing, this is a tough image to start
> with.
> >
> > Because there is some nice stuff on the edges, I'm hoping that you won't
> crop your version.
> >
> > One thing I don't have yet is SGBNR or Grain Surgery. I think that would
> help this one a lot.
> >
> > You know that if you do a good job with it, the folks on the APML
> (especially me) will want to know what you did in gory detail.
> >
> > I found that WinZip did not compress the file very much, so I didn't
> bother with it. If you're on a 56K modem, it will take at least half an hour
> to download. I downloaded the image and opened it in Photoshop to test its
> validity.
> >
> > http://world.std.com/~mattb/lmc.tif
> >
> > http://world.std.com/~mattb/gallery/astro/lmc.html
> > --
> > Matt BenDaniel
> > matt@starmatt.com
> > http://starmatt.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>

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