[argyllcms] v1.1.0 RC1 How the TAC is accounting while the calibration is provided?

  • From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Mon, 09 Nov 2009 16:09:52 +0300

From: Graeme Gill
Date: Mon, 09 Nov 2009 18:23:15 +1100

> Gerhard Fuernkranz wrote:
> > This applies indeed to the other, gamma-adjusted space presented by the
> > driver to the user. It certainly suffers from the problem that summing
> > the colorant values won't sum up the actual ink amounts (but there is a
> > non-linear relationship). I understand that this is the obvious reason
> > why you wanted to calibrate the _raw_ space of the halftoning engine
> > instead.
> V1.1.0 colprof takes care of that if the .ti3 ends up with calibration
> tables embedded into it, which will be the case if printtarg is supplied
> with the calibration using either the -K or -I options. Similarly
> collink will take the calibration into account when computing
> total ink limits if the profiles it is given have the calibration
> embedded in the .ti3 embeded in them by colprof.

Does it mean that I shouldn't use -nc option in colprof if I want to set the 
total ink limit in collink?

What does the total ink limit parameter mean for colprof when the calibration 
curves are provided? For example I have the calibration with limits detected by 
printcal C=79% M=68% Y=48% K=52%. If all channels is at their maximums, will 
the summ be account in colprof/collink as 247% or 400%?

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