QTR-Quadtone RIP

Terry,

> Is there some write-up or info sheet somewhere on how to manipulate the
> numbers to change the ink curves in these files?
>
There is no write up - but it's really simple.
Each ink channel is a list of 256 values one for each 8 bit Gray value (0
-255).
Each of these values represents the amount of ink that is put down from that
channel for a given Gray value.
The ink values are 16 bit i.e. the max value is  65536 = 100 on the graph.

That's it - really really simple. Change the ink value for a given Gray
value and the RIP puts a more (or less) ink from that channel for that Gray
value

Mike

>
>

> --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com>,
> Michael King <drmrking@...> wrote:
> >
> > Terry,
> >
> > So you can manipulate quad file values directly in excel or another
> > spreadsheet (Opencalc for example). This actually gives you greater
> control
> > than you get with a QIDF file as you control the ink curve data directly
> > rather than through the QIDF descriptor.
> >
> > I do this to linearize QUAD files for different papers.
> >
> > If you just want to view the curves you can do that in QTR print app by
> > selecting the quad file as though you were going to print with it and
> then
> > right click on it to display its ink curve graph.
> >
> > Mike
> >
> >
> >
> > On 25 January 2011 14:59, Terry <TerryGls@...> wrote:
> >
> > >
> > >
> > > Mike,
> > > Thanks for the the response.
> > > I assume you understand the PC Curve Creation feature in QTR for
> Windows
> > > that allows one to easily view the ink curves and easily modify an
> exsisting
> > > ink profile. It is very easy compared to what the Mac people need to do
> with
> > > the QIDF text file IMHO.
> > >
> > > I downloaded some ink files from the forum (QUAD only) that look like
> they
> > > would be close for another paper use...and I want to view and
> "engineer" the
> > > ink settings before printing with QTR.
> > >
> > > Thanks again, Terry
> > >
> > >
> > > --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com><QuadtoneRIP%
> 40yahoogroups.com>,
> > > Michael King <drmrking@> wrote:
> > > >
> > > > Terry,
> > > >
> > > > >>So, I have some QUAD files that I would like to see in the Curve
> > > Creation.
> > > > I tried opening the QUAD files with Notepad, Wordpad, etc and it is
> just
> > > a
> > > > bunch of meaniless numbers not organized like the QIDF Text Files
> which I
> > > > understand.
> > > >
> > > > You can't create a QIDF from a QUAD. But the Quad files are far from
> > > > meaningless numbers, they actually describe in detail the ink curves.
> You
> > > > can load them into excel and graph /edit them.
> > > >
> > > > What do you want to actually do with these quad files?
> > > >
> > > > Mike
> > > >
> > > > On 25 January 2011 01:44, Terry <TerryGls@> wrote:
> > > >
> > > > >
> > > > >
> > > > > I too have the same question.
> > > > > I use QTR on a PC which has the Curve Creation which allows viewing
> and
> > > > > changes to QIDF files to create new profiles and creates the QUAD
> file
> > > (as I
> > > > > understand it)
> > > > >
> > > > > So, I have some QUAD files that I would like to see in the Curve
> > > Creation.
> > > > > I tried opening the QUAD files with Notepad, Wordpad, etc and it is
> > > just a
> > > > > bunch of meaniless numbers not organized like the QIDF Text Files
> which
> > > I
> > > > > understand.
> > > > >
> > > > > Any help appreciated.
> > > > >
> > > > >
> > > > > --- In QuadtoneRIP@yahoogroups.com <QuadtoneRIP%40yahoogroups.com><QuadtoneRIP%
> 40yahoogroups.com><QuadtoneRIP%
>
> > > 40yahoogroups.com>,
> > >
> > > > > Michael King <drmrking@> wrote:
> > > > > >
> > > > > > Will,
> > > > > >
> > > > > > The QUAD file is the one you want to edit. It is the file that
> > > contains
> > > > > that
> > > > > > actual curve data.
> > > > > >
> > > > > > Mike
> > > > > >
> > > > > > On 30 August 2010 22:33, Will <bill.clark@> wrote:
> > > > > >
> > > > > > >
> > > > > > >
> > > > > > > Using Windows 7 Pro. Using QTR 2.7 Is there a way to "convert"
> a
> > > QUAD
> > > > > file
> > > > > > > to a QIDF file so I can edit the "text file" and modify the
> curve?
> > > I
> > > > > hope to
> > > > > > > modify an existing "almost right" curve to suit my needs, but I
> > > have
> > > > > only
> > > > > > > the QUAD from which to begin.
> > > > > > >
> > > > > > > Any help appreciated!
> > > > > > >
> > > > > > > Will Clark
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > > > [Non-text portions of this message have been removed]
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> > >
> > >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>  
>


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