preview/photoshop
preview/photoshop
- Subject: preview/photoshop
- From: Ross Peterson <email@hidden>
- Date: Sun, 16 Jan 2005 12:40:37 -0600
Thanks John,
I'm running an Alu 20" Cinema off my 15" Powerbook (FW800) with 10.3.7.
Both displays are profiled with Monaco Optix XR Pro and I am using a
LUT table based profile for the Cinema and a matrix profile for the PB.
Exactly, thanks for not taking offense, better to start from the ground
up and not make assumptions. So, you open an image in Photoshop and in
Preview, on the same monitor, and they look different.
Only sporadically. Most of the time the match between Photoshop CS and
Preview (Safari,Mail) is very close. It is only on those occasions when
the match goes "off" that I am asking about. (Keynote never gets it
right from what I can tell)
In Photoshop if you are leaving the image in it's original space when
opening, then Photoshop should be doing a match from that image's
embedded profile to the profile of the display with the menu bar.
Not here. On my system it appears that PS is matching to the display
that the image was opened on. If I open an image on the PB display and
drag it to the 20" I get a bad color shift. It appears that PS CS is
matching to the display the image was opened on, not the colorSync
"default" display.
Preview will do a match from the image's embedded profile to the
profile of the default display set in ColorSync Utility. So for these
to be equivalent, you'll have to make sure the menubar display is the
default display in ColorSync Utility.
That appears to be how it works here. But that seems kind of bogus to
me in that it would guarantee that one always gets a "wrong" rendering
on the non-default display with Preview.
Sometimes calibration apps don't set the display profiles correctly, to
avoid that you can use System Prefs - Displays - Color to make sure the
profile you just created is really assigned to the right display by
selecting it in the list of profiles. By selecting different profiles
you'll see the screen change color somewhat if the profile contains a
VCGT tag, which it should.
Yes, I understand that and when this anomalie occurs I have carefully
checked ColorSync Utility to make sure that all devices have the
correct profiles associated with them.
It sounds to me like the problem is related to having multiple monitors
and the difference between which display profile Photoshop uses to
match to, and which display profile Preview uses to match to.
I can definitely see how that could cause some confusion, but I don't
think that's the case here as I only use my Powerbook display for
palettes etc. in a dual set-up. I rarely put an image on that display
and no image ever opens on the Powerbook in dual mode.
One problem you might run into is that you create a profile, it's
assigned to a monitor, but after you reboot it's not. This happens if
there's something about the profile that the display manager doesn't
like, something nonstandard, and when you reboot or log in the display
manager rejects the new profile and reverts to something else. That
might not affect your case if the Photoshop and Preview relevant
displays are the same, but it's worth keeping in mind.
Everything is working properly in that regard.
Another problem that can happen is when a calibration app creates a
profile but assigns it to your other display, that's why it's best to
check with System Prefs.
That's always the first thing I check when I see the mismatch has
reappeared.
Unfortunately everything you relate here is "normal" behavior and I am
trying to suggest that what I am observing is abnormal behavior and the
ONLY way I have found to correct it is to either Archive and Install
the OS, or better, trash the hidden Preference files referenced by
Jason Sewell via the terminal. Early on in this exchange you suggested
that there was no way for a preference file to become "corrupted" and
I'll concede that may be improper terminology, but the fact remains
that trashing those three files corrects the problem on my and at least
a few other's systems.
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