Re: sRGB, sCMYK, and RGM PCS
Re: sRGB, sCMYK, and RGM PCS
- Subject: Re: sRGB, sCMYK, and RGM PCS
- From: Roger Breton <email@hidden>
- Date: Tue, 04 Jan 2005 20:05:44 -0500
Paul and Harold,
> AN RGM (Reference Medium Gamut) and what is termed a 'single printer-like
> gamut' for inkjet I guess. This is suggested as an addition to the CIELab
> PCS, giving a smaller but standard colour space only a little larger then
> the gamut that the better CMYK printers can handle.
I watched the PDF presentation that Harold posted the URL in his post and
thought it was well done.
This is an idea that makes sense, if you ask me, in a way. On the one hand,
it will make the whole ICC framework less 'observer-oriented' and more
'device-oriented'. Instead of relying on an abstract model of color
representation it will rely on a limited gamut physical model. But since it
holds the potential of minimizing quantization issues associated with color
conversions, in that it proposes to encode transforms on a much smaller (and
realistic?) scale, then, in my view, this alternative 'reference' medium
should be welcome.
> This, if adopted by the ICC for ICC4,xx would first use an perceptual RI,
> and be called sCMYK.
Well, see, that is a dangerous sideproduct. I would hate people in prepress
or photography to start to refer to it as "sCMYK" because it's very easy to
be lured by a name. In my view and not to confuse it with the idea of a
"real" standard CMYK (we all know this is an oxymoron), HP should take a
humble stance on it and dub it "hp_inkjet sCMYK". Because then everyone will
clealy get the intention.
> This transform is considered by HP to be less harsh, a milder transform,
> when going from sRGB to CMYK, then using CIELab and the PCS ICC route.
That makes sense.
> This sCMYK can then, via a minor conversion, be changed for each inkjet
> printer.
Oh? We'll see some simplified tweaking editor based on that sCMYK? Why not.
I will only heighten people's awareness to digital color. Maybe HP will tie
this with Microsoft upcoming Longhorn new color paradigm?
> The concept seems to be aimed at the prosumer inkjet printing market?
It has potential. It could even become the next 'PhotoCD' for printers.
> Paul Sherfield
Regards,
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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