Lab is always "just right" (was Hexachrome Scanning)
Lab is always "just right" (was Hexachrome Scanning)
- Subject: Lab is always "just right" (was Hexachrome Scanning)
- From: "Vanderlinden, Thomas M." <email@hidden>
- Date: Fri, 7 Sep 2001 09:14:01 -0400
good morning, however far from it you are- - - - -
Terry Wyse's comment:
>
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.
>
brings up a concern that's been lurking in my mind
since I purchased and began using the very helpful
ColorThink from CHROMiX.
When I view with the 3-D Grapher a Lab profile gamut
overlaid with other color spaces I work in,
I notice that the Lab space does not completely enclose them.
The reds of Adobe RGB (1998), EktaSpace PS 5, J. Holmes,
my custom scanner RGB profile, my custom ink jet profile,
all hang out of the Lab space in varying degrees.
This is a concern because Lab is our default storage space,
chosen partly for the advantages Terry mentions.
That something like EktaSpace hangs out is not that big of an issue for us,
but that even scanner & printer profiles do wonders me a bit.
Doesn't this mean that when a file is converted from the scanner space
to Lab that the entire gamut is being compressed to get that red wing in?
And further, that there are reds that the ink jet printer could produce
that are no longer present in the file?
- - - Tom Vanderlinden
email@hidden