Re: Gamut Mapping choices in ProfileMaker 5
Re: Gamut Mapping choices in ProfileMaker 5
- Subject: Re: Gamut Mapping choices in ProfileMaker 5
- From: Marc Levine <email@hidden>
- Date: Fri, 04 Mar 2005 10:22:44 -0500
> Well, I'd like to hear it from the 'horse's mouth' to believe it. Anyone
> from Logo or X-Rite or Heidelberg or Fuji here?
Roger/Marco,
There is a unique compression scheme that is used in each of the rendering
intents (Lab to device, or B2A) that allows a profile to transform color
based on the objectives on the intent (in other words...render). I cannot
speak to competitive packages, but MonacoPROFILER uses one engine that
delivers both accuracy of in-gamut color rendering, as well as optimized
rendering of out-of-gamut colors.
I suppose there are many ways to skin a cat and - depending on your product
focus - there are many ways to implement updated compression models in your
software. The way we have done it in MonacoPROFILER is that we re-built our
math engine (all intents) to incorporate the benefits of earlier revisions,
and to push the quality further in each of the rendering methods. In
MonacoPROFILER, there is no new algorithm to select in version 4.7.
Functionally, the buttons are basically the same (there are some new
features, but I will leave that aside). The difference is that the new math
just makes the product work better.
In terms of whether or not colors move in the colorimetric tables....of
course they do. Otherwise, everybody would make the same profile. While the
intent of the colorimetric transform is to preserve color accuracy, simply
clipping out the colors that don't fit is probably not the best solution.
Finding the right combination of detail and color accuracy is probably
closer to the "real intent".
There's a lot of stuff that goes on under the hood when building profiles
that makes a difference in the end result such as the way the boundary of
the profile is measured and any science that is used to "adjust" Lab data on
which the compression models are applied.
Understanding the ICC spec is a good thing, but sometimes knowing more about
the science really isn't going to do you much good. Look at it this way: if
you get a flat tire, knowing how rubber is vulcanized may help you
understand how it came about, but it doesn't change the fact that you need a
new tire (which is something you probably knew the second you heard the
"pop"), and it won't change to cost of the tire either. What's more
important than what things are supposed to do is what they do do.
I've really got to look into this short-answer thing!
Marc
--
Marc Levine
Sales Guy
Technical Guy
X-Rite Incorporated
Email email@hidden
www.xrite.com
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