QTR-Quadtone RIP

Thank you very much Kentaro.  I have downloaded your newer qdensity.exe
file and will try it.

The increasing L* values you have tried go from darker to lighter.  So
it would seem the density values should also go from darker to lighter. 
Such as 1.30, 1.24, 1.18 . . . 0.05.  Not 0.05, 0.12, 0.18 . . . 1.30. 
Also, if I enter density values in the same way I do for making a QTR
profile to print a positive print (from lighter to darker), how would
the program module know that I want to linearize a digital negative
profile and not a profile for printing positive prints.

Do you agree?


  Bill Iverson

bill@... <mailto:bill@...>

--- In QuadtoneRIP@yahoogroups.com, "kumagaikentaro"  wrote:
>
> Hi bill_iverson
>
> Linearization Fixed patch (for Windows QTR)
>
> http://www.digital-negatives.jp/download.html
> /
> http://www.digital-negatives.jp/download/qdensity.zip
>
> Please copy qdensity.exe
> C:\Program Files (x86)\QuadToneRIP\bin
> or
> C:\Program Files\QuadToneRIP\bin
>
>
> Please the density values start out low and increase.
> I tried Lab(L*) values (26.3, 27.6, 31.2, 35.9.....) (EyeOne,
Colormunki, etc).
> But I have not tried the Optical density(1.18, 1.24, 1.30, ....)
>
> *For paper(positive print) the density values start out high and
decrease
> *For Altanative(Negative print) the density values start out low and
increase
>
>
> Please try it!
>
>
> Kentaro Kumagai
> http://www.digital-negatives.jp/
>
>
>
> --- In QuadtoneRIP@yahoogroups.com, "bill_iverson_washington"
bill.iverson@ wrote:
> >
> > I've recently been told that QTR can directly linearize profiles for
digital negatives by entering 21-step density values read from a print
made from the digital negative, so that the density values start out
high and decrease (e.g., 1.30, 1.24, 1.18 ... 0.05).  Sure enough, when
I enter these values in the linearization tab, QTRgui Curve Creation
generates new Ink Curves for the profile, which seem to be modified from
the previous Ink Curves generated simply with the ink description.
> >
> > My question is how do I know if my installed QTR has the newest
version of this digital negative linearization feature?  A posting by
Kentaro Kumagi in June 2012 (msg. 10358 Re: "starter profiles" for
digital negatives) provides a link to a "fixed patch for Win QTR ...
given by Roy [Harrington]" which provides this capability.  I never
installed such a patch,a but the fact that my QTR linearization tab will
accept density values running from high to low suggests I somehow
acquired the capability (I think).  I believe I have QTR 2.7.2,
downloaded in the past year, but determining just what I have is hard
since "QTR 2.7.2" apparently still uses the 2.7.0.0 QTRgui Windows
interface.  My QTR "About" panel and hard drive info indicate I have the
following modules:
> > QTRgui 2.7.0.0 file date 3/27/2010 size 10,574,404
> > QuadToPrinter 2.7.2.0 file date 8/14/2011 size 827,392
> > QuadProfile 2.7.2.0 file date 9/8/2011 size 917,570
> >
> > Sorry to pose such a tedious question, but using the wrong
linearization feature or using it in the wrong way would make my already
somewhat time-consuming and expensive efforts to create digital negative
profiles for PtPd printing even so.  Thanks.
> >
>



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