Re: scanback profiling question
Re: scanback profiling question
- Subject: Re: scanback profiling question
- From: Roger Breton <email@hidden>
- Date: Sat, 03 May 2003 13:44:32 -0400
>
Bruce Fraser said
>
>
>
> If you have a LUT-based input profile, the input>PCS part of the
>
> conversion gets built using the specified rendering intent. The
>
> PCS>working space part of the conversion uses relcol unless the user
>
> requests abscol, because the working space profiles are matrix
>
> profiles, and matrix profiles contain only one rendering intent. In
>
> theory, you can build matrix profiles using any rendering intent, but
>
> the Photoshop WS profiles are all relcol.
>
>
I have been chewing on this for a week,
>
this is what I'm trying to swallow:
>
It sounds like we are saying that ONE
>
profiles and CMM-based conversion actually makes TWO
>
applications of rendering intent:
>
one from source to PCS, and
>
one from PCS to target.
>
True?
That is also my understanding. One the one hand, the Source profile is
invoked to convert the Device data to PCS (Lab) and then the Destination
profile is onvoked to convert the PCS data to Device. It so happens that on
either the Mac or Windows, the two Source and Destination profile are
"concatenated" into what is known as a "Gworld, the conceptual equivalent of
a Device Link profile. At which time, you can imagine that the conversions
are done at the speed of, well, silicium.
>
- - - Tom Vanderlinden
>
printing for preservation
Regards,
Roger Breton
Laval, Canada
email@hidden
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.