Re: Pre-color-management scans legacy
Re: Pre-color-management scans legacy
- Subject: Re: Pre-color-management scans legacy
- From: Stephen Marsh <email@hidden>
- Date: Sat, 05 Jan 2002 01:12:12 +1100
Paul wrote:
>
> When I started scanning my images, I had PS 6 color management disabled (I am now scanning in the ICC mode). How should I consider the scans that I made earlier in non-specified RGB mode? <<
Hi again Paul, we have discussed some of the finer points of the ES
Supreme in the past - but I can't recall specifics of your setup etc.
I presume that these were RGB scans with endpoints set for each image -
rather than a 'ICC workflow scan' with fixed endpoints (as in Don's
PDF). What flavour of RGB did you use? Was this the raw scanner profile
for ref/trans RGB? This is near linear device R=G=B grey balanced with
canned profile...or custom profile? Or perhaps a scanner trnasform from
device to workspace RGB 'on the fly'.
What RGB workspace was in use in ver6? Adobe RGB? CreoScitex say A98 is
close to raw scanner RGB (taken with a grain of salt). I presume that
the files were simply opened with no tagging or conversion - and the
workspace RGB was simply presumed for these images. There is no such
thing as 'unspecified RGB' - even if not activly colour managing, the
defaults chosen for gray/rgb/cmyk workspaces are still meaningful.
>
> I have scanned them using the default end points mode proposed by Don Hutcheson, and I kept the raw scan values, adding simply a curves layer. Has the color gamut been clipped that way or is it as wide as for the scans I now make into a wide gamut profile? Would you suggest a way to integrate the non-profiled scans into the color managed workflow? <<
If you can supply the profile that was in use in the legacy scans, then
you can describe the RGB numbers. Without a profile, the RGB numbers do
not mean much.
As for the legacy scans...my questions above point the way.
Find how the colour was handled previously, as in what scanner RGB and
Photoshop RGB was in use, as well as the workflow. Once all this is
known, you can choose to assign the correct profile or assign/convert
from a preferred profile etc to fit the workflow in use.
Hope this helps,
Stephen Marsh.