QTR-Quadtone RIP

The QTR linearization is not per channel so overlaps of different inks
don'tchange.
 So there's no iterative issue and it isn't possible.
I think the biggest variables are the printer and the reader.   The 21x4
wedge is
the most effective because it'll average 4 patches and readings for each
step.
It works very well as long as there aren't a lot of wiggles in the basic
output -- you
can't fix that very well with a linearization correction.

Roy


On Jan 17, 2008 6:55 AM, Olivier <odesmais@...> wrote:

> > You could have a point that correction on the overlaps may
> > not work out as needed but I think the QTR linearisation on
> > the partitioned channels total as theoretically better than
> > calibrating individual channels and the partitioning done
> > after that like happens on my Z3100.
>
> To clear misunderstanding, I don't mean QTR linearization routine is
> any better or worse than others. It's simply that there's to my
> knowledge no modelling of overlapping densities. So one can not treat
> a multiple density output as a single density output.
>
> >Of course when iterative measuring is
> > implanted in QTR's linearisation this should mean finer
> > adjustment on the output if the adjustment was not fine
> > enough already. Roy is the one qualified to give an answer
> > on that but he was already qualified when he wrote that
> > linearisation tool so I guess it must be working correctly.
>
> I tried a double linearizeation in QTR without output, just
> evaluating the curve graph : it looks like it works.
>
> Olivier
>
>
>
>
> Yahoo! Groups Links
>
>
>
>


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