QTR-Quadtone RIP

Hi Roy!

Thanks for your answer...

That bring mutch light in my darkness!!! ;-)))

CU

Peter

--- In QuadtoneRIP@yahoogroups.com, "Roy Harrington" <roy@...> wrote:
>
> Hi Peter,
> 
> There are 3 create icc programs because some editing programs have
> restrictions and anomolies.
> 
> QTR-Create-ICC makes a grayscale ICC for printing and softproofing.
> Photoshop handles these and works great.
> 
> QTR-Create-ICC-RGB makes a functionally identical ICC but it's in
RGB format.
> Programs such as Lightroom, Qimage, and I think others don't work in
> grayscale so you need an RGB format ICC file.
> 
> QTR-Create-ICC-RGB-bpc is similar to the above but maps black-to-black
> directly.  This takes away softproofing with simulate-ink-black
capability.
> But some programs seem to get the "Black Point Compensation" wrong with
> the above ICC profiles so this ensures that everything is correct.
> 
> It's unfortunate that there seems to be variation of how different
programs
> handle B&W issue but that is the current state of things -- so
different ICCs
> are needed for them.
> 
> Roy
> 
> 
> On Wed, Oct 15, 2008 at 9:32 AM, grayscale2008 <pm2003@...> wrote:
> > Hi Joost!
> >
> > Thanks for your answer...
> >
> > Is there perhaps somebody who can answer my question 2???
> >
> > Or where can I find some more docu about creating curves?
> >
> > CU
> >
> > Peter
> >
> >
> > --- In QuadtoneRIP@yahoogroups.com, "Joost Horsten" <j.h.j.h@> wrote:
> >>
> >> --- In QuadtoneRIP@yahoogroups.com, "grayscale2008" <pm2003@>
> >> wrote:
> >> >
> >> > Hi guys!
> >> >
> >> > I am new to QTR
> >>
> >> Welcome!
> >>
> >> > and I am trying do create some curves for my EPSON
> >> > 2100 using Hahnemühle Photo Rag with the original UltraChrome ink.
> >>
> >> Frankly, I thought these curves were already shipped with QTR but I
> >> checked and indeed they're not. You may try the the Epson Enhanced
> >> Matte curves though as EEM is rather similar to Photorag.
> >>
> >> > Here are my questions:
> >> >
> >> > 1.) I want to linearize my curves now. Which file for measuring
> >> should
> >> > I use?
> >> >
> >> > There is a "21step.tif" in the "QTR"-directory and there are
several
> >> > Step-21*.tif files in the "Eye-One"-directory.
> >>
> >> From a fundamental point there's no difference. It depends how you
> >> want to proceed. This is how it is with an Eye-one and Measuretools
> >> download from the Gretag-MacBeth website (URL is in the QTR doc):
> >>
> >> The "21step.tif" and the "step21-gray" are both single sequential
> >> stepwedges. I always use a modified version of the 21step.tif as I
> >> can easier align me Eye-one on it. But then I tell Measuretools I'm
> >> using step21-gray.
> >>
> >> Step-21-random is meant for a line scanning mode in Measuretools.
> >> Instead of measuring the 21 areas one by one it should be possible to
> >> have one single movement over the step wedge. Measuretools in then to
> >> detect the transitions between the areas. Therefor neigbhoring areas
> >> must have sufficient contrast, not true for the sequential step
> >> wedge. However, I've never been able to get this feature to work
> >> well. So I just have a manual process. So  use the sequential one.
> >>
> >> The setp-21x4-random allows for four measurements thus averaging out
> >> noise.
> >>
> >> As matter of fact, I do have made a sequential QTR-21x4-gray.txt file
> >> (the input files that measure tools reads) to allow for the averaging
> >> over four measurements using the sequential stepwegde.
> >>
> >> So all and all, it's 1) mostly personal preference 2) depending if
> >> you want to add accuracty by averaging out some noise.
> >>
> >> > 2.) Which file should I use to create a icc profile?
> >> >
> >> > There are 3 exe-files in the "Eye-One"-directory:
> >> >
> >> > QTR-Create-ICC.exe
> >> > QTR-Create-ICC-RGB.exe
> >> > QTR-Create-ICC-RGB-bpc.exe.
> >>
> >> I'm afraid I can't help you on this one as I don't use them
> >>
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>