Re: Adobe CMM
Re: Adobe CMM
- Subject: Re: Adobe CMM
- From: "Ken Kameda" <email@hidden>
- Date: Wed, 1 Aug 2007 10:42:36 -0700
- Thread-topic: Re: Adobe CMM
Rolf,
> PS CMM Expected Happening
> On On BPC taking place OK 1*
> On Off BPC taking place NOT Ok, no BPC
happening 2*
> Off On BPC taking place OK 3*
> Off Off NO BPC OK 4*
Thanks for testing and documenting this behavior so thoroughly.
And, stop using the Adobe CMM inside of Photoshop! :-)
Seriously, though, we struggled with how to deal with the BPC setting
for the Adobe CMM. Our original goal was to offer the ACE functionality
for non-Adobe applications, but in order to get results to match between
Photoshop and a non-Adobe application, we needed to have the same
settings for both apps, including rendering intent and BPC. Most
applications have some control for rendering intent, but non-Adobe apps
don't have BPC settings, so we created the prefs file to control this
for the Adobe CMM.
To have matching results, the workflow would look something like this:
Photoshop + ACE + BPC in color settings dialog
Non-Adobe + Adobe CMM + BPC in CMM prefs file
Although the Adobe CMM can be used in Adobe apps, that is not its
primary use case. Thus, we have the problem of which BPC setting takes
precedence, the Adobe CMM's own setting, or Photoshop's. I think the
behavior you found is a bug, although one could argue that the Adobe CMM
is behaving properly by honoring its own prefs setting. Having the prefs
file take precedence makes Adobe and non-Adobe apps results consistent,
but it makes Photoshop color settings using the Adobe CMM inconsistent.
I'll need to look into what is happening in this situation with the
duelling settings, and think about which behavior makes the most sense.
Ken Kameda
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