Re: EFI RIP Quirks
Re: EFI RIP Quirks
- Subject: Re: EFI RIP Quirks
- From: Henrik Holmegaard <email@hidden>
- Date: Sun, 29 Oct 2000 02:34:20 +0100
Jeff Harmon <email@hidden> wrote:
>
Also, am I to safely presume that "Color Matching- Photo" means "relative
>
colorimetric" and "Photographic" means "perceptual"? How does "Color
>
Matching - Solid" relate to the ICC spec?
Color Matching - Solid : probably Relative Colorimetric as some think this
intent is right for solid areas of color.
Color Matching - Photo and Photographic: probably Perceptual in both cases,
with a UI typo to confuse matters.
>
I was asking
>
whether I needed to select "PostScript Color Matching" additionally.
If a RIP has an ICC front-end, then it supports what's in your profiles.
You can load the profiles in an application that supports softproofing,
like LinoColor 6 or Photoshop 6, and check them out.
With PostScript Color Matching you're blind, because any conversions in the
RIP aren't in a format that supports softproofing. A CSA -> CRD combination
is intended to convert into deviceCMYK and then the RIP will flush the
data. Because the data is intended to be flushed rather than be repurposed,
the format isn't built with a back transform to the connection space,
CIEXYZ in the PostScript CMS (that was architecturally adressed in the ICC
framework four years later). In the PostScript CMS the simulation is the
print itself, and anything that happens in the RIP can only be checked
after the fact with a spectrodensitometer, but the conversion tables can't
be.
Try leaving the option unchecked.
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