QTR-Quadtone RIP

In the excellent tutorial Tom Moore has put together he mentions that 'Roy 
Harrington ... has a semi-automated process that can use the Eye-One 
spectrophotometer'.  Has Roy posted the procedure to the group?  I was not 
successful finding it on his website.  I think such a process would speed my 
rather tedious efforts at building my own profiles.

Thanks in advance for the help.  I certainly get a lot from the interchanges 
amongst this group.

--- In QuadtoneRIP@yahoogroups.com, "Fred Drury" <fotofred2@e...> wrote:
> In the excellent tutorial Tom Moore has put together he mentions that 'Roy 
> Harrington ... has a semi-automated process that can use the Eye-One 
> spectrophotometer'.  Has Roy posted the procedure to the group?  I was not 
> successful finding it on his website.  I think such a process would speed my 
> rather tedious efforts at building my own profiles.
> 
> Thanks in advance for the help.  I certainly get a lot from the interchanges 
> amongst this group.

In the main folder   \Program File\QuadToneRIP  there's a write up about using
the Eye-one and MeasureTool so you can scan an whole stepwedge in one swipe.
On the Mac there's a utility to convert Lab values to density, but now its possible
to just enter the Lab (just L) values directly.

Roy

--- In QuadtoneRIP@yahoogroups.com, "Roy Harrington" <roy@h...> wrote:

> In the main folder   \Program File\QuadToneRIP  there's a write up 
about using
> the Eye-one and MeasureTool so you can scan an whole stepwedge in 
one swipe.
> 
Roy, I am interested in using Eye-one and MeasureTool to scan step-
wedges. I've looked in the "Files" section and all I get access
to is two files (QTR mini Tutorial on Curves.rtf  and UCpk-
EPremSemiGloss-cool2.zip). As a new member do I have restricted
access 
to files or am I looking in the wrong place for the mentioned files? 
I've tried looking for "main folder \Program File\QuadToneRIP" but I 
don't know where the main folder is.

Regards, Kev Bell

--- In QuadtoneRIP@yahoogroups.com, "Kevin Bell" <kevbell@e...> wrote:
> --- In QuadtoneRIP@yahoogroups.com, "Roy Harrington" <roy@h...> wrote:
> 
> > In the main folder   \Program File\QuadToneRIP  there's a write up 
> about using
> > the Eye-one and MeasureTool so you can scan an whole stepwedge in 
> one swipe.
> > 
> Roy, I am interested in using Eye-one and MeasureTool to scan step-
> wedges. I've looked in the "Files" section and all I get access
> to is two files (QTR mini Tutorial on Curves.rtf  and UCpk-
> EPremSemiGloss-cool2.zip). As a new member do I have restricted
> access 
> to files or am I looking in the wrong place for the mentioned files? 
> I've tried looking for "main folder \Program File\QuadToneRIP" but I 
> don't know where the main folder is.
> 
> Regards, Kev Bell

I meant the folder on your PC where you installed QTR.  Usually it's
C:\Program Files\QuadToneRIP  but you might have a different drive letter.

There's an Eye-One-ReadMe that tell where to get MeasureTool and what
targets to use.  They are also in the same folder.

Roy

Many thanks for the reply Roy.  I found the write up you mentioned and
have been successful scanning the 21 step random strip and saving as
text file.  Now my problem is finding the Calc-Density program needed
to convert my text file (Lab values, I presume) into density values.

Once again, thanks in advance for the help.

Note to All: I hate to think where I would be in this profiling effort
were it not for the help and assistance so readily available on this
forum!

Fred Drury
Markland Imaging

--- In QuadtoneRIP@yahoogroups.com, "Roy Harrington" <roy@h...> wrote:
> --- In QuadtoneRIP@yahoogroups.com, "Fred Drury" <fotofred2@e...> wrote:
> > In the excellent tutorial Tom Moore has put together he mentions
that 'Roy 
> > Harrington ... has a semi-automated process that can use the Eye-One 
> > spectrophotometer'.  Has Roy posted the procedure to the group?  I
was not 
> > successful finding it on his website.  I think such a process
would speed my 
> > rather tedious efforts at building my own profiles.
> > 
> > Thanks in advance for the help.  I certainly get a lot from the
interchanges 
> > amongst this group.
> 
> In the main folder   \Program File\QuadToneRIP  there's a write up
about using
> the Eye-one and MeasureTool so you can scan an whole stepwedge in
one swipe.
> On the Mac there's a utility to convert Lab values to density, but
now its possible

> to just enter the Lab (just L) values directly.
> 
> Roy

> From: fotofred2
>
> Many thanks for the reply Roy.  I found the write up you mentioned and
> have been successful scanning the 21 step random strip and saving as
> text file.  Now my problem is finding the Calc-Density program needed
> to convert my text file (Lab values, I presume) into density values.

Like he said, you don't have to do that. The QTR curve maker is equally
happy with density values or Lab values.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

Paul ...

Thanks for the input.  It is helpful, but I would also like to check
the Dmax and the charts in Tom Moore's tutorial are based on density.
 Once again, thanks for the input.

Fred Drury,
Markland Imaging.

--- In QuadtoneRIP@yahoogroups.com, "Paul D. DeRocco" <pderocco@i...>
wrote:

> > From: fotofred2
> >
> > Many thanks for the reply Roy.  I found the write up you mentioned and
> > have been successful scanning the 21 step random strip and saving as
> > text file.  Now my problem is finding the Calc-Density program needed
> > to convert my text file (Lab values, I presume) into density values.
> 
> Like he said, you don't have to do that. The QTR curve maker is equally
> happy with density values or Lab values.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...

Hi Fred,

The nice thing about using Lab is that the ideal values just a straightline.
The L values are exactly what QTR linearizes to.  Densities are a more complicated
function.

If you do want to convert so you can compare dMax etc. these are the formulas:

first compute Y = luminance
Y = L/903.2               if L < 8
Y = ((L+16)/116)^3   if L >=8

second compute d = density
d = -log(Y)

typical whites are around L=95 to L=97
typical blacks on matte paper are around L=14 to L=17
  on photo paper more like L=4 to L=8

Roy


--- In QuadtoneRIP@yahoogroups.com, "fotofred2" <fotofred2@e...> wrote:

> Paul ...
> 
> Thanks for the input.  It is helpful, but I would also like to check
> the Dmax and the charts in Tom Moore's tutorial are based on density.
>  Once again, thanks for the input.
> 
> Fred Drury,
> Markland Imaging.
> 
> --- In QuadtoneRIP@yahoogroups.com, "Paul D. DeRocco" <pderocco@i...>
> wrote:
> > > From: fotofred2
> > >
> > > Many thanks for the reply Roy.  I found the write up you mentioned and
> > > have been successful scanning the 21 step random strip and saving as
> > > text file.  Now my problem is finding the Calc-Density program needed
> > > to convert my text file (Lab values, I presume) into density values.
> > 
> > Like he said, you don't have to do that. The QTR curve maker is equally
> > happy with density values or Lab values.
> > 
> > --
> > 
> > Ciao,               Paul D. DeRocco
> > Paul                mailto:pderocco@i...

> From: Roy Harrington
>
> The nice thing about using Lab is that the ideal values just a
> straightline.
> The L values are exactly what QTR linearizes to.  Densities are a
> more complicated
> function.
>
> If you do want to convert so you can compare dMax etc. these are
> the formulas:
>
> first compute Y = luminance
> Y = L/903.2               if L < 8
> Y = ((L+16)/116)^3   if L >=8
>
> second compute d = density
> d = -log(Y)
>
> typical whites are around L=95 to L=97
> typical blacks on matte paper are around L=14 to L=17
>   on photo paper more like L=4 to L=8

Or, just go to
<http://www.brucelindbloom.com/index.html?CompandCalculator.html> and let
the machine do it.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

Paul & Roy

Many thanks for your assistance.  Very much appreciated!

Fred Drury
Markland Imaging

--- In QuadtoneRIP@yahoogroups.com, "Paul D. DeRocco" <pderocco@i...>
wrote:
> > From: Roy Harrington
> >
> > The nice thing about using Lab is that the ideal values just a
> > straightline.
> > The L values are exactly what QTR linearizes to.  Densities are a
> > more complicated
> > function.
> >
> > If you do want to convert so you can compare dMax etc. these are
> > the formulas:
> >
> > first compute Y = luminance
> > Y = L/903.2               if L < 8
> > Y = ((L+16)/116)^3   if L >=8
> >
> > second compute d = density
> > d = -log(Y)
> >
> > typical whites are around L=95 to L=97
> > typical blacks on matte paper are around L=14 to L=17
> >   on photo paper more like L=4 to L=8
> 
> Or, just go to
> <http://www.brucelindbloom.com/index.html?CompandCalculator.html>
and let

> the machine do it.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...