Re: v4 profiles and PRMG
Re: v4 profiles and PRMG
- Subject: Re: v4 profiles and PRMG
- From: Andrew Rodney <email@hidden>
- Date: Wed, 06 Jun 2007 11:31:34 -0600
- Thread-topic: v4 profiles and PRMG
On 6/5/07 6:54 PM, "Graeme Gill" wrote:
> It can only have an influence over color transforms performed using
> profiles that make use of the PRMG as the target gamut, ie.
> using profiles that are build using the PRMG. So to do
> a transform from sRGB to PrinterA, both the sRGB and PrinterA
> profiles need to have been built using the PRMG as the target gamut.
So the disconnect at this point is the lack of working space profiles in v4
format with the PRMG tag? Are we any closer to seeing this (and who's doing
this work, the ICC)?
> According to the proponents, it noticeably improves results for the
> casual color user. It may benefit the professional user as well,
> but there is limited flexibility, since the fundamental nature
> of making use of a standardized PCS gamut such as the PRMG is
> that you get a "Saturation" type intent, where the source
> gamut is both compressed and expanded to conform to
> the destination gamut.
When the rubber meets the road, what can an end user expect to see that
improves these results? It almost sounds like its a good idea on paper but
I'm wondering what we'd see if a sample of images where converted and output
using this new process and the old. I understand the results could be
anywhere from 'night and day' to 'so subtle, no one would notice.'
It seems as if this work has been going on awhile and there's still not way
for users to access this, I'm wondering why. Is it a chicken and egg issue?
The vendors are slow to adopt because end users don't know the advantages
and end users are not asking for it because it doesn't fully exist.
> since Argyll (currently) is
> tuned for a single step gamut mapping rather than a two step
> via the PRMG, and each profile tool will have different gamut
> mapping algorithms (as per usual!).
So where does that put us with respect to the advantages of this new
technology which is supposed to reduce ambiguity? Seems like a baby step if
that.
Thanks for explanations!
Andrew Rodney
http://www.digitaldog.net/
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