Re: XYZ or Lab space for profile info?? (WAS: PhotoCal+Spyder experience)

["Rew, Alan" <arew@gresham-computing.com>]

<x-charset iso-8859-1>On Wed, 29 Aug 2001 07:54:58 -0700,
Steve Upton <upton@chromix.com>, wrote:

<snip>
> The profile connection space (PCS)- where they all hook together - is 
> typically Lab but for many monitor profiles is XYZ. Again, not big 
> deal as the system will handle the conversion so we tend to think of 
> them as the same thing.
<snip>

So the PCS that's actually used to connect a particular set of profiles
together - which only comes into play inside a CMM (e.g. Adobe ACE) - is
usually Lab. In this case the CMM will have extra work to do where a profile
happens to use XYZ to hold it's PCS data. One reason for my confusion was my
failure to distinguish between the PCS data in a profile and the PCS used in
a CMM, and assuming that they had to be the same type.

<snip>
> Confused yet?
<snip>

Not at all - your explanation was very helpful (as usual!).

Thanks for your help.

Alan Rew
-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.

</x-charset>