RE: [APML] Again! Gamma Cygni Re-reprocessed

["Centaurus A" <centaurus_a@virgilio.it>]

Hi Geoff,

I was actually puzzled if inserting the color space profile or not. I
looked at your web page with the difference, and I have to say that on
my monitor, the image saved with srgb looks too much red and this is
what I tried to avoid because Stuart told me there was too much red. As
I can see from my monitor, my image looks less red, and the colours are
less intense (I can possibly put more saturation) but the histogram is
better balanced. Probably there must be a trade-off between colour
balance and saturation of nebulas.

I'd like to hear from someone else about embedding colour
profiles....what do you guys out there think about it?

Regards,
Nicola

> -----Original Message-----
> From: astro-photo-bounces@seds.org 
> [mailto:astro-photo-bounces@seds.org] On Behalf Of Geoff Powers
> Sent: 20 April 2004 03:49
> To: Discussion of Film Astrophotography
> Subject: Re: [APML] Again! Gamma Cygni Re-reprocessed
> 
> 
>  Nicola writes:
> > Ooops ....sorry
> > 
> > This is the correct link...
> > 
> > http://astrofoto.laza.it/it/technical_details_it/gammacyg.html
> > 
> > thanks for pointing this out :-)
> 
>  You're welcome...  :-)
> 
>      If I may, I'd like to point something else out to you. I 
> saved your Web-published image to my hard drive, and opened 
> it in Picture Window Pro. There was no embedded color profile. 
> 
>      This is not a good thing. This means that either a 
> browser or sometimes a server program will assign the 
> individual pixel color values. It is best to use an advanced 
> image editor (e.g. Photoshop, Picture Window etc.) to assign 
> color space... for Web display, this should be sRGB.
> 
>      The gamma-cyg image is much deeper, with better contrast 
> and color saturation, than your Web file reveals. To 
> dramatize this, I have published a private, APML only page, 
> with a mouse-over to blink-compare the difference. Go to:
> 
     http://home.att.net/~astropix/color_space_effects.html

     Nicola, if your machine pulls from the cashe', you may see no
difference in the mouse-over... but I'd guess most other viewers will
see the remarkable difference that I see on my machine!

     All this 'color management' stuff has become a concern for even the
casual snap-shooter... not just the pro color labs!

 Hope This Helps...   :o)

--
 Geoff

http://home.att.net/~astropix/


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