[argyllcms] Re: targen options

Graeme Gill schrieb:

>That would be the logical thing to do. This is not
>unreasonable given how critical grey tones are in
>judging results.
>
I've the impression, for subjective judging they are even more critical 
than e.g. a dE94 weighting would suggest.

Unfortunately, a combined linearization of the channels cannot be done 
with 1D color ramps, but also requires 3D patches near the grayscale. 
And maybe, also an iterative approach might be necessary, which adds 
more points at each iteration, taking the errors of the previous 
iteration into account.

I'm even wondering whether it may be necessary to do this separately for 
the B2A tables for colorimetric and perceptual intent (since the 
perceptual gray axis may differ from the colorimetric one).

>If your basic control over the device is limited (such as by limited screen 
>levels),
>then yes, there is not much a color correction system can to do correct the 
>results.
>
Sure, I just wanted to mention this case as well, I did not complain. 
And in this case the flaws were clearly explainable.

Regards,
Gerhard

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