Re: Pass through profile?
Re: Pass through profile?
- Subject: Re: Pass through profile?
- From: Graeme Gill <email@hidden>
- Date: Fri, 02 Feb 2007 01:26:52 +1100
Jon Crook wrote:
Is there a way to create a profile (or does anyone have one to share) that
is empty or does nothing. We just received a new Fiery Rip on our new Konica
C6500 and I want to profile papers but there isnt a ³None² option for an
output profile. It appears that you must select a profile from a library or
select a media profile that they supply. Im looking to do an output on the
base calibration alone. I havent had much training on this RIP yet but I
thought that maybe one of you could help me.
For the most common type of profile (a device profile), there's no
such thing, since a device profiles translates between PCS and device
values. Only with device link or abstract profiles (device -> device,
PCS -> PCS respectively) can you create a do-nothing profile.
You can create a pair of do-nothing device profiles, as long as
the device is 3 channel (RGB or CMY), simply by using the
same profile for input space and output space, with colorimetric
rendering intent selected for both (ie., say using the sRGB profile).
For 4 channels (CMYK), this can't really work, since the
colors will pass though a PCS representation that looses
the black separation information.
Most RIP's will have some mechanism for printing out test charts
without translating colors through profiles, although they may not
document how. For a RIP that uses pure PostScript mechanisms for
color correction, it may be as simple as formulating the test chart
in PostScript Device space, and making sure that the UseCIEColor
page device parameter is turned off.
Graeme Gill.
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