Datacolor User to User Support Group.

If I understand the question correctly, "tagging" an image file with a
profile results in embedding a color profile with or in the image file; thus
the profile that is embedded travels with the image file and becomes the
profile that the image editing application (if it supports color management)
will default to.  If a file is not tagged, then the image editing program
will warn the user and ask them if they want to use the image editing
programs default working color space (i.e., editing color space) as the
color space profile or  if the user wants to convert or assign another color
space profile to the file.  The color profile that one selects determines
the characteristics of the color space that is used including the shape,
range, and nature of the color gamut available for viewing, editing, and
other functions depending on the choices the user makes.

 

By proofing an image, I am assuming that you are referring to merely
previewing the image in the image file and not to what is called "soft
proofing" of the image, which enables one to simulate in RGB color space
what a printed CYMK image would look like and what areas of the image might
be out of the printer's color gamut.  I further think that one needs to
understand the difference between "assigning" a profile to a file and
"converting" an image file to a profile; they are two separate and
distinctly different things.  I will not go into a discussion since there is
much written on this already; but I will refer you to the following link for
a brief readable descriptive explanation:
http://www.earthboundlight.com/phototips/color-management-converting-assigni
ng.html.

 

 

From: colorvision_group@yahoogroups.com
[mailto:colorvision_group@yahoogroups.com] On Behalf Of rschoner
Sent: Monday, May 05, 2008 7:03 AM
To: colorvision_group@yahoogroups.com
Subject: [colorvision_group] Tag or not to Tag?

 

Hi,

When printing, proofing and evaluating images should they be "Tagged"? 
I notice that your test images are untagged so I get a warning when I 
open them in PhotoShop for Proofing. Other test images that I have are 
tagged with Adobe RGB or sRGB or something. Tagging your images or 
untagging the other images changes the proofing and printing results. 
So should I tag or not (I guess I'm really not very clear what a tag 
does for/to an image)?

Thanks,

Bob Schoner