Re: Colorsync-users Digest, Vol 6, Issue 90
Re: Colorsync-users Digest, Vol 6, Issue 90
- Subject: Re: Colorsync-users Digest, Vol 6, Issue 90
- From: Rolf Gierling <email@hidden>
- Date: Wed, 29 Apr 2009 09:57:32 +0200
Hello Chris,
I agree the situation is that not all DeviceLinks contain the psid
tag to identify
the destination profile, and the presence would not help either if
the profile
does not exist on the system.
But a smart way until now would have been to use the destination menu
in the
convert to profile dialog, or an enforced dialog to assign the
destination profile.
You just could have asked in this list for ideas, as well as you
could have asked
DeviceLink software creators in this list for support of the psid tag.
Regards
Rolf Gierling
Am 28.04.2009 um 21:45 schrieb Chris Cox:
Marco;
No, most device link profiles that we found still don¹t have the
destination
profile information in them. Only the most recent tools appear to
embed the
destination profile data (and they're still inconsistent about how
much they
embed, and at least one had to fix a bug because they embedded
truncated
information).
That's why Photoshop can't reliably obtain the destination
information. We
have the code in place to do so, but, well, without widespread profile
support it was kinda hard to test -- so we turned it off for now.
Chris
Message: 10
Date: Tue, 28 Apr 2009 11:46:04 -0700
From: Marco Ugolini <email@hidden>
Subject: Re: Photoshop CS4 DeviceLink CMM Engine
To: Koch Karl <email@hidden>
Cc: ColorSync Users Mailing List <email@hidden>
Message-ID: <C61C9CFC.1AEB7%email@hidden>
Content-Type: text/plain; charset="ISO-8859-1"
In a message dated 4/28/09 1:14 AM, Koch Karl wrote:
Joseph, Marc,
let me try to explain:
The differences between the Adobe and Apple CMMs and the DeviceLink
CMM result from a bug (or should I call it a feature) in Adobe
Photoshop.
When you convert from one color space into another one with a
DeviceLink in Photoshop's Convert to Profile Advanced Conversion
Options, Photoshop does NOT assign the destination profile as the
new
document profile. You have to do that manually in order to get the
correct appearance on your (calibrated and profiled) monitor.
In contrast, basICColor demon reassigns the destination profile
automatically so that you have the correct appearance immediately
after the conversion ? the same as with the other CMMs after
assigning
the profile manually.
It seems that the device link conversion feature in Photoshop CS4
is still a
first step, a rough introduction to the functionality, with much
room for
improvement -- which hopefully will come.
One question I have, though, is the following: do *all* device
link profiles
contain precise information on the destination color space, or a
copy of the
destination profile within them? If they don't, how would
Photoshop know
which profile to assign post-conversion, if and when it should be
made
capable of doing that?
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