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QTR-Quadtone RIP

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Re: Qimage BPC cutting Dmax ?

2007-12-30 by ferdinand_paris

--- In QuadtoneRIP@yahoogroups.com, "Eric Neilsen" <e.neilsen2@...> wrote:
> And now that Mike has released v200, all your tests may change with
> the next upgrade. Darn frustrating : ( 

At the risk of someone thinking that I've become obsessive about this,
I did indeed rerun these tests.  Qimage 2008.200 results are at:

   http://www.ferdinand-paris.com/BPC-Qimage_V3.png

The only one that has changed compared to my V2 histograms from
2008.109 is converting to a generic profile in Qimage without BPC,
which now has a very large amount of black point clipping.  I don't
recall seeing any CM changes flagged in the release notes.

So now there is some reverse symmetry.  If you convert to a generic
QTR profile in Qimage, you *must* use BPC or else you will see a lot
of shadow blocking.  On the other hand if you convert to a custom
profile (or at least mine), then you should *not* use BPC or else you
will get a big dMax loss.

Go figure!

F_P

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