Re: null match
Re: null match
- Subject: Re: null match
- From: Graeme Gill <email@hidden>
- Date: Fri, 12 Jul 2002 11:40:39 +1000
Chris Murphy wrote:
>
Technically this is what device link profiles are for. If the source
>
color space is the same as the destination color space (which is what
>
you're saying when the source profile and destination profile are the
>
same), then it makes sense that you would get a null transformation.
Sorry I don't follow you. In what way is this "what device link profiles are for" ?
As far as I can tell, device link profile aren't "for" anything in particular,
they are just a labeling of a profile that represents a device to device color
transformation. Such a transformation may well have been created from a link between two
device <-> PCS profiles, but so what ?
Saying that "it makes sense" could be a dangerous assumption. I can see
that in many common situations, particularly dealing with 3 chanel profiles,
optimising out such transformation would probably be the best thing,
and might be what the majority of users expect. As soon as you
start dealing with CMYK profiles, this assumption could well
be counter intuitive.
>
>I'm pretty familiar with the ICC spec., and I don't recall
>
>any section specifying how ICC profiles are to be linked. Care
>
>to quote the section number ?
>
>
Not every convention adopted by the ICC is in the ICC spec which has to
>
do primarily with the file format for profiles. I believe the ICC posts
>
minutes of their meetings on their web page.
Not everyone involved in color is an institution, and has the
funds to be a member of the ICC, and in any case, something hidden
on a members only web page does not constitute an international standard.
Graeme Gill.
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