On Mon, 2007-04-23 at 22:10 +0200, Julien Michielsen wrote:
> On Sunday, April 22, 2007 10:30 pm, Tommy Lim wrote:
> > > Hi,
> > >
> > > I am looking for tutorials that teach me how to use
> > > Gimp for astronomy
> > > photos processing?
> > >
> > > Any idea?
> >From Astroblog
> http://astroblogger.blogspot.com/2006/03/yet-another-venus-animation.html
> "Coming soon, Ian's guide to using The Gimp for astrophotography."
> ---
> Some time ago I was pointed to Registax, a windows program that runs
> well under wine. With Registax one stacks (stax ;-) a series of almost
> identical images which are composed with a webcam. As far as I under-
> stood the images must be overlapped perfectly. I think this can be done
> with photoshop. Could Gimp achieve this as well?

I tried Registax with wine some time ago without much success. Things
might have improved since then so I must try again. Meanwhile there is
an application called AstroStack, freely available on the Web, which
does what you need for stacking multiple photos. Also, the usual tools
such as contrast, brightness, sharpness etc are readily available and
not difficult to use in Gimp. 


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