Hi Mark
6/6/03 5:19 pm Mark Johann <mjohann-at-speakeasy.net> wrote
>Thanks for the reply Neil,
>
>> It's likely that the image viewer isn't using the profile - just
>> throwing the image at the calibrated screen. Whereas Photoshop uses
>> the profile [which describes the calibrated monitor and adjusts the
>> image that last few percent].
>
>I'm able to manually adjust my desktop monitor to such a white point
>that matches my target (5000�) via it's individual RGB guns. Hence
>images look close to how they appear in Photoshop when viewed through
>non color savvy apps. I attribute this to the ability to get my
>monitor in such a close matching state to my RGB working space:
>ColorMatch.
Colormatch is not generally a good choice, for some workflows it is, though.
>
>As for the Powerbook, is color accuracy being sacrificed when
>calibrated to a white point (5000�K) that's not native and can not be
>manually adjusted as such?
yes I'd think so
> If I've calibrated to a 5000/1.8 standard,
have you treid 6500 2.2 as I sugested?
>working in an RGB space
>that's similar (ColorMatch),
workingspace gamma and screen gamma are totally unrelated.
>and opening up a file in PS that I choose not
>to color manage,
why would you want to do that?
>shouldn't it look the same through a viewer that's not
>color savvy?
no
Photoshop does not obey the <do not colour manage> request but still
uses the screen profile and assigns the setup workingspace, I
discovered this after MANY hours of testing - you'd have to assign the
screen profile to the document (image) to get that to work.
to be fair this is getting a bit to complex to discuss by email
> If Photoshop is using the profile to compensate for the
>monitor's inability to render accurately the working space, does the
>difference between the two views reflect the monitor's inadequacy in being
>calibrated to such a difference of white points?
that sounds like a riddle
testing would be needed
>
>One thing I noticed is that the images match if I assign the monitor's
>profile to the one in PS.
aha
as i expected.
>I'm confused!
perhaps you need help?
>
>>>> Could this be due to the fact I'm calibrating the Powerbook to a D50
>>>> standard, and have no way of manually adjusting the "guns" of the
>>>> LCD to set it in such a "native" state? Is this causing Photoshop's
>>>> to compensate for the monitor difference between the calibration and
>>>> profile?
>> this is a bit confused, see above.
>>
>
>Mark Johann
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/
===============================================================
GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
