Stephen
Opening the can of worms.
13/11/03 7:46 pm Stephen Shepherd <s.shep-at-virgin.net> wrote
>"Then Convert to the profile you want to work in - in this case it's
>Adobe 98."
You had some valid advice about how to do what you wanted to do, but
none I saw about why you'd want to do it (or not).
What could be the advantage in converting sRGB to Adobe RGB (unless
ARGB is, for some valid reason, imposed upon your workflow?).
Photoshop, since 6, will handle almost seamlessly (and display) files
from differing colour spaces alongside each other.
To say that Adobe RGB is always <better> without qualification is
ridiculous, although it is said often enough.
Converting sRGB to Adobe RGB is like taking a pint of beer and pouring
it into a litre glass. It sloshes around ;-). Imagine Kate Moss in
Jordan's bra. You might like the big bra but if you're putting Kate
into it it's somewhat pointless (prefer the Kate physique myself BTW).
Danny Devito in Arnolds suit?
OK - Enough analogies.
Say you now have that sRGB data in ARGB.
Because of the way the popular Perceptual gamut mapping works, any
(perceptual) conversion - down the line to a smaller colour space
(maybe a CMYK press?) - will unnecessarily compress the gamut of your
image. This happens whilst making room for the whole of that overized
workingspace - mapping the whole colour space to fit into the destination
colour space (regardless of image saturation).
There are often reasons to use larger workingspaces -
Especially so when taking account of the gamut of scanned trans and
moving data from scanner space to workingspace by ICC conversion, this
step is a conversion which is so brutal as to regularly clip detail in
saturated areas.
However for digi cam data which often starts as sRGB why bother, unless
you want to boost saturation to beyond that achievable in sRGB. (which
would usuallly be unprintable anyway).
Unless you really need Adobe RGB (maybe the agency expects it,
simplistic, but a valid reason) then stay in sRGB, to do otherwise is
more than somewhat ill advised.
sRGB aint that bad, you don't need a bucket to hold a pint of beer.
Regards, NeilB. Apple Solutions Expert
colourmanagement.net :: Consulting in Imaging & Colour Management
custom scanner and printer profiles, training on Imacon Scanning
supply Gretag + eyeOne, ColorSoloutions basICColor : Display etc. XRite
www.colourmanagement.net/ :: www.apple.com/uk/creative/neilbarstow/
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