Re: Profiling the ip5000
Re: Profiling the ip5000
- Subject: Re: Profiling the ip5000
- From: "Roberto Michelena" <email@hidden>
- Date: Thu, 18 May 2006 08:30:48 -0500
Marco,
> Isn't it the point of printing an *untagged* testchart to submit to the
> driver raw color *numbers* -- in all manners of combinations from 0 to 100
> in CMYK or 0 to 255 in RGB in all channels -- not married to any specific
> source space, and let them fall where they may in the output device's space?
That holds true if the printer is of the same colorspace of your test
target (CMYK or RGB) and if the data path is able to convey that
colorspace directly (which for example is impossible to do for CMYK
under Windows or MacOS9 when using system drivers).
Given that your printer is neither CMYK nor RGB, the driver *has* to
make a conversion. If you don't tag your source, it will just assume
one (whichever it's programmed to assume).
Andrew,
Tagged or not, that's probably what's going to happen if you set PwP and the
driver correctly (as you point out, No Color Management in CS2). Tagging the
file would make no difference here.
But again, I was talking about avoiding the system drivers and using
Canon's Photoshop Plugin, which among other niceties is reported to
take 16-bit input. I am assuming it also takes into account the source
profile (of the open document you are printing). Unless it has a
specific "max gamut RGB" or "RGB for profiling" setting, the most
likely outcome for untagged source is that it will assume sRGB or
something like that and print accordingly.
-- Roberto Michelena
Infinitek
Lima, Peru
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