Re: [APML] Redo- Sagittarius - M8 to M17

["Vicent Peris" <vicentperis@ya.com>]

> Still, every PI image I've seen for months has looked very 
strange. The
> colors are WAY off, with purples, greens and oranges 
dominating, and
> everything else has looked fuzzy, or soft. Is this because of 
user
> inexperience?


Hi Alan,

at this point, I must do a clarification. I think what Alan refers 
as fuzzy is not a noise reduction issue. I think it can be due to 
large scale processing procedures. I have  showed my 
techniques to several friends. The problem is that large scale 
processing involves many advanced steps that, depending on 
your eye, your skills, and your intuition, you cannot dominate 
within months (or more time) of hard work. Let me show you a 
quick example; with large scale processing, you can do things 
like this:

Before:
 http://pteam.pleiades-astrophoto.com/Vicent/B145_before.jpg

After:
http://pteam.pleiades-astrophoto.com/Vicent/B145_after.jpg

The second image looks too much fuzzy?? The main trick is
having some equilibrium while processing an image. I think that
processing only small scale features of the image is so erroneus
as processing only large features of it. In essence, both small 
scale and large scale processing have the same nature. 

And one simpler example. In June, I was in Canary islands, at
the Roque de los Muchachos Observatory. At 2300 meters high,
the Milky Way Center was impressive, with an incredible 
contrast, with a lot of dark lanes running over it. The first 
impression I had was that it looked **exactly** like an image
processed only with large scale techniques! In fact, my eye
wasn't able to view small features on the Milky Way. 

So, what's more natural??? The crispy images you like, or the
fuzzy images generated with large scale processing??? I think 
many of those basic topics for the beginner astrophotographer 
are today no so clear, at least for me, after 6 years of hard 
work...


Have a good day! :-)
Vicent.
 

_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo