Re: Gutenprint settings for profiling ?
Re: Gutenprint settings for profiling ?
- Subject: Re: Gutenprint settings for profiling ?
- From: "Roberto Michelena" <email@hidden>
- Date: Mon, 19 Jun 2006 09:20:28 -0500
* "Uncorrected" if you are applying a profile that assumes the output
is well-linearized (the most common case).
So if I understand this right, in "Uncorrected" mode the driver is
applying both an ink limit (table for different resolution/media
combinations), and linearization curve (also table for
resolution/media combination).
Are these driver tables readable/editable?
Is the linearization based on density, L*, Chroma, ?
I'd rather relinearize in the driver curves themselves than apply an
external linearization...
* "Density" if you are applying your own linearization curves, but
want to have the output value scaled for the correct amount of ink
(not recommended in 8-bit mode).
So here the driver only applies the ink limit table. Is this a per
channel limit only, or also a total ink limit or even 2-color limits?
* "Raw" if you are applying your own linearization curves, including
setting the total amount of ink (not recommended in 8-bit mode).
Correct ink amounts will be *highly* dependent on resolution.
Quite self explanatory this one. So here the driver just applies
screening algorithm to the data as it comes.
The default color correction when printing photos is normally High
Accuracy, which does cross-channel (HSL) corrections. I don't
recommend this if you're doing your own color management, but as
usual your mileage may vary. The other color correction modes that
do HSL adjustment are Bright Colors (which does the same correction
as High Accuracy but which hard clips saturation rather than
asymptotically approaching 1) and Correct Hue Only (which corrects
the hue, but doesn't adjust saturation or luminosity; this usually
achieves darker and more vivid, but less accurate, cyan-based
colors).
So none of this other modes would be recommended for profiling since
they all do cross-channel corrections; right?
How about the Light Inks integration? is there a way to drive as
6-color and generate 6-color profiles?
Or maybe a way to output a 6-color (CMYKcm) linearization chart, so as
to also define the mixing curves of C and Lc , M and Lm?
best regards,
-- Roberto Michelena
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