Re: scanner profile not showing up in Photoshop
Re: scanner profile not showing up in Photoshop
- Subject: Re: scanner profile not showing up in Photoshop
- From: Marc Levine <email@hidden>
- Date: Sat, 21 Jun 2003 11:37:21 -0400
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From: email@hidden
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Reply-To: email@hidden
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Date: Fri, 20 Jun 2003 21:57:02 -0700
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To: email@hidden
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Subject: colorsync-users digest, Vol 3 #863 - 18 msgs
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Is there something inherantly different about scanner profiles that would
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not allow one to convert to it from some other space?
Hi Eric,
There IS something inherently different about scanner profiles....they are
input-only. This means that they have no inverse (PCS->device) table.
Scanner profiles contain only forward table (device->PCS) info. Basically,
the profile will allow the user to "label" his device data with Lab, but
contains no information on how to convert Lab's into the device space. I
would expect that the reason you might want to do this is because you have
some automated color processing tool that is expecting scanner-format data
and you have a set of files that you would like to convert to the scanner
space so that you could process them through the same set up. In such a
case, you would need to rewire your processing tool queues to use a more
standard color format and convert the existing scanner files into that
space. Also, neither archiving, nor editing would benefit from such a
process 9if it were possible) as it would introduce additional device
limitations and device non-linearities to your color data that would more
likely compromise your workflow than benefit it.
Unlike a scanner profile, a monitor profile IS an output profile (it renders
the Labs from your system into RGB to feed to your video card that drives
your monitor that lives in the house that Jack built). What this means is
that the profile has instructions for going both in and out of the PCS from
device data. In other words, photoshop will allow the user to select a
monitor profile under both "assign" and "convert to" functions.
Hope this helps.
Marc
--
Marc Levine
Monaco Systems
Sales Guy
Technical Guy
978.824.2220
email@hidden
www.monacosys.com
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