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QTR-Quadtone RIP

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Message

Re: linearization questions

2005-05-03 by Roy Harrington

Hi Tyler,

As things stand Linearization is a one-shot operation.  I.e. you always apply it
to the same "raw" output. However the gamma and (highlight/shadow) values
are applied first so you can get closer to linear before getting to the final
linearization.  These help a whole lot because the 21 steps are more evenly
spaced out.   

I've thought about allowing iterative linearizations or possibly linearizations
at other levels i.e. gray or toner linearizations.  How valuable do you think
this would be versus how more complicated it would be?

Roy


--- In QuadtoneRIP@yahoogroups.com, Daniel Staver <daniel@p...> wrote:
> Right now you can only do one linearization. Roy might correct me on 
> this, but looking at my Quadprofile source code I don't think there 
> would be anything to prevent me from building in a few more iterations. 
> (Quadprofile is only gluing together various components made by Roy so I 
> don't always have a complete overview of how everything works).
> 
> Linearization is applied after gamma, shadow and highlight. You're free 
> to set those to anything you like before you do the linearization.
> 
> --
> Daniel Staver
> http://daniel.staver.no
> 
> 
> Tyler Boley wrote:
> > I am trying some odd things with inks that lay down a great deal of ink.
> > Don't ask why <G>.
> > 
> > Two questions-
> > 
> > Is linearization iterative? In other words, will additional
> > linearizations over a previous fine tune it, or will any linearization
> > always be a correction from the "native state"?
> > 
> > If one enters a gamma of something other than 1 in the gray curve
> > section to initially bring things more in line, will linearization
> > correction include that gamma assuming the setting remains the same
> > from there on out?

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