[argyllcms] Re: Neutralize Grey Axis
- From: Nikolay Pokhilchenko <nikolay_po@xxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 12 Jan 2011 14:23:11 +0300
Klaus Karcher wrote:
> We have a bluish paper
> colprof uses paper color for adaptation by default
> (a= +3, b= -11 in this case). The midtones are as blue as the paper.
>
> My first attempt was to use a=b=0 for adaptation.
> The midtones were less blue now, but still not neutral
> (as the gamut mapping code reduces the effect of the tweaking)
> so one could argue the direction was right, but the magnitude was too small.
>
> Therefore my next guess was a= -3, b= +11 (i.e. same direction but twice
> the distance from paper white).
Klaus, I suppose there the parameter -da: may be impotrant. May be when You
increase it's value, the result become more
neutral? Or I'm mistaken? Unforunately I can't test it myself at a time.
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