[argyllcms] Re: Version 0.53 - Gamut mapping warning message.
- From: Roger Breton <graxx@xxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 17 Dec 2005 14:05:26 -0500
> It's been noted that V0.53 (and V0.52) sometimes emit
> the following message when creating profiles or linking:
>
> "Warning: Gamut mapping is non-monotonic!"
>
> This seems to only happen when creating a gamut mapping for
> a saturation intent. It basically means that the saturation
> gamut mapping is not as smooth as it could be. I'm not sure
> of the practical significance - the gamut boundary values
> change a little more abruptly than I really like, but colors
> with the gamut still seem to still behave reasonably, and the
> generally expectation for saturation mapping is that saturation
> is favoured over other factors (such as smoothness).
Graeme,
When building the profile with argyll would it be possible that you help us
"peak" at the underlying device behavior with some smoothness statistics?
Like, your code makes some decisions based on the measurements but it's all
happening to some extent inside a black box, even though you supply us with
command line arguments to control the mapping. I'd really like to see what
those non-monotonics statistics look like as that would surely help
appreciate pinpoint errors.
Regards,
Roger Breton | Laval, Canada | graxx@xxxxxxxxxxxx
http://pages.infinit.net/graxx
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