Graphics Programs Reference
In-Depth Information
Fig. 2-1
Top: A 3D gamut
map showing the
Mitsubishi Wide Gamut
monitor (green) over the
gamut of a standard CRT
display (red). Although the
gamut is larger in many
areas, there are still a few
areas where the gamut is
slightly larger in the
standard CRT.
Bottom: A 3D gamut map
of Adobe RGB (1998)
(green) and the gamut of
my Pictrography 4500 (in
full color). Here you can
see that at this angle,
some yellows and magenta
colors fall outside the
gamut of Adobe RGB
(1998) although most of
the gamut is fully
contained. Although Adobe
RGB (1998) is a fairly large
gamut working space,
there's a still some
overlap. When comparing
the gamuts of dissimilar
devices or color spaces, it's
common for an overlap to
appear (mismatch of
gamut).
The Bottom Line—Numbers, Previews, and Conversions Are
All in Sync
The color architecture in Photoshop requires at least two ICC profiles in
order for users to see the same color, from the same numbers, on mul-
tiple displays, and to allow each to convert the data to a new color space
identically. An embedded profile for the document is necessary so the
numbers have a definition that Photoshop can interpret. The display
profile is necessary to allow the Display Using Monitor Compensation
mechanism to function properly. By dealing with documents in these
working spaces, we don't introduce specific device characteristics into the
documents we are editing. Think of this as a standardized method of
dealing with RGB documents by making the RGB working space
