RE: Repurposing HSV on SGIs
RE: Repurposing HSV on SGIs
- Subject: RE: Repurposing HSV on SGIs
- From: Henrik Holmegaard <email@hidden>
- Date: Fri, 9 Feb 2001 09:08:34 +0100
So the files I'll be getting exported to me will be
basically untagged RGB.
Right, an assumed source CMYK profile doesn't work when the source is
RGB. Then it's back to figuring out what standard monitor phosphor
set the application uses for its internal RGB since it doesn't use
actual monitor phosphors measured by a colorimeter. Standard monitor
phosphor sets are built into software calibrators, for instance.
In this situation where all the monitors will be off by definition,
maybe a color server that does a global color correction with an
abstract profile inserted between assumed source RGB and printer CMYK
might be useful.
separated in-RIP blindly, with no specifically defined input or output
profiles/spaces.
Well, if there is a RIP then the printer relies on PostScript, and if
there is PostScript there is a default 'device color' matrix
conversion from RGB to CMYK with hardcoded black generation (level 1,
level 2 and level 3). A RIP level 2 and above also has CRDs.
They currently output to an Iris, and will be outputting to Epsons, both of
which, I believe look for RGB input, and would be profiled as "RGB"
printers.
If there is a RIP there is a PostScript printing pipeline and these
are CMYK printers. If there is no RIP then the printers rely on the
QuickDraw printing pipeline and these are RGB printers.
I'd think the IRIS has a RIP and the Epsons don't. To make things
work there should be a RIP in front of the Epsons, too.
BTW there used to be negotiations between Kodak and SGI on
implementing the Kodak ICC CMS in Irix. If I remember rightly Todd
Newman was the SGI representative to the ICC at the time. Maybe
nothing happened, I'm not sure.
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