Re: linearization - luminance, chroma or density?
Re: linearization - luminance, chroma or density?
- Subject: Re: linearization - luminance, chroma or density?
- From: Ray Maxwell <email@hidden>
- Date: Sun, 21 Jan 2007 14:07:09 -0800
Marco,
I agree with you.
All that is necessary, is to do an a* vs b* plot of step wedges for
each color. From this you can clearly see when you have achived
maximum chroma. Moving beyond this point is folly. You cannot get a
larger gamut than this point. You are only adding muddy density
beyound this point.
Ray Maxwell
Marco Ugolini wrote:
In a message dated 1/21/07 12:07 PM, Roger Breton wrote:
Personally, I don't feel one approach is all that superior to others
although I always liked GlobalGraphics approach more than the others
(ProofReady Plug-in used with SetGold). In the end, I'm always surprised to
see that good color matching results can be had despite what seems like poor
results out of some RIP's linearization procedures.
Personally, as a non-color-scientist, I suspect that chroma-based
linearization is the way to go, because I have seen density-based procedures
go too far and end up cutting some of the available saturation in the output
(specially the procedures that are based on visual evaluation, as opposed to
measurement-based).
Whereas it would seem to me that limiting the ink at the point just before
one starts to detect a decrease in chroma would guarantee the highest
saturation achievable in a given device. That way, the device will perform
at the peak of its color gamut while avoiding the pitfalls of excessive ink
amounts (first and foremost being the tortured profiles that usually
result).
I would be interested in hearing the opinion of other colleagues.
Regards.
Marco Ugolini
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