Re: Hexachrome Scanning
Re: Hexachrome Scanning
- Subject: Re: Hexachrome Scanning
- From: Terry Wyse <email@hidden>
- Date: Thu, 06 Sep 2001 15:09:31 +0000
on 9/6/01 5:57 PM, Dan Reid wrote:
>
Don't use your scanner profile as the source since you are converting to a
>
Photoshop working space. Instead use the Photoshop working space as the
>
source with Hex Image.
Although I personally would choose to convert the raw scan into a RGB
working space that's JUST bigger than the scanner profile, I think a case
can be made for simply using the scanner profile as the source, especially
if no editing will be performed in the scanner space, but later after the
Hex conversion. Other than the possibility of editing the image in a
non-linear scanner space/profile, what disadvantage would there be to using
the scannerRGB as source?
>
I would certainly consider a working space that encompasses your
>
Hexachrome output profile.
Humm...well, I'd take an input-centric approach here (thanx Bruce!) and NOT
worry about the Hex profile but simply use an RGB space that matches up good
with the scanner. Too small a space/profile here and you've unnecessarily
lost colors in the original scan and too BIG you're risking an equally bad
and unnecessary gamut compression if you use a perceptual intent.
>
The whole point of Hexachrome is get more
>
saturated vibrant colors. Prematurely desaturating the image by converting
>
to a smaller working space will not retain the rich data from the scanner. I
>
would look towards a working space that encompasses your scanner profile and
>
secondarily the Hexachrome output profile.
Ah, here I can agree!
Another option would be to simply go direct from scannerRGB to Lab and not
worry about all the gamut/profile fitting stuff. Lab is always "just right"
with the main disadvantage being if you need to edit the file further, Lab
can be a pain.
Terry
_____________________________
Terence L. Wyse
Color Geekus Emeritus
All Systems Integration, Inc.
http://www.allsystems.com
email@hidden
_____________________________