Digital BW, The Print

Carl,

Are you using Windows XP?  I think one problem I'm having is that the Create
ICC program doesn't seem to want to run at all.  I assume this is a
different program than the Create Curve program -- or am I totally confused?

Paul
www.PaulRoark.com 


> -----Original Message-----
> From: DigitalBlackandWhiteThePrint@yahoogroups.com
> [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Carl
> Schofield
> Sent: Monday, October 17, 2005 5:02 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: Re: [Digital BW] ICC v. Transfer Function in Epson driver
> 
> Paul,
> 
> A simple text file with a column of Lab L values or density values
> measured from a 21 step wedge is probably all you need (use a column
> heading of D for density values or L for Lab L values).  Just drag
> and drop the text file onto the Create-icc script and it should
> create both the icc profile and a text file with a plot of the data.
> 
> Carl
> 
> On Oct 17, 2005, at 8:42 PM, Paul Roark wrote:
> 
> > Steve,
> >
> >
> >> ...
> >>
> >
> >
> >>> So, does black point compensation mean the curve hits (0,0)?
> >>>
> >>
> >> Yes.  ...
> >>
> >
> > OK, BPC is used to take care of the end point issues, as I
> > understand it.
> >
> >
> >
> >> ... in XYZ (for B&W we only care about Y)
> >>
> >
> > I thought Y in CIE XYZ was green.  Or do you mean the Y in xyY?
> >
> >
> >> ...
> >> BPC scales the data such that the curve begins at 0,0.
> >> So when you send pixel value 0 to the printer
> >> it gets left at 0 and hence prints as dark as the printer possibly
> >> can.
> >>
> >
> > This is what I'd want.
> >
> >
> >> ...
> >>
> >
> >
> >>> Is the QTR Curve Creator Linearization tab a look-up take interface?
> >>>
> >>
> >> Now it is.
> >>
> >
> >
> > I think I'm only able to open the Curves Creator and not the
> > "QTR-Create-ICC.exe."  Is this just a Mac program, or does it
> > require i1?
> > (It's in the i1 folder.)
> >
> >
> >
> >
> >> ... [Roy's] aim is to proof hue and luminance correctly.
> >>
> >
> > Ultimately, that could be useful, but for the B&W I'm targeting now
> > it's
> > complexity that gets in the way of the basics of B&W printing.
> >
> >
> >> ...  ICC profiles have the advantage
> >> that people can set up soft proof in the normal fashion.
> >>
> >
> > That sounds like another complex story.  If we're in PS the custom
> > dot gain
> > curves do it, but we do need to get a simpler method.
> >
> >
> > ...
> >
> >>> Is there a place that describes the specific ways in which a
> >>> Windows XP user
> >>> can use QTR to make an ICC that can be used in the Print with
> >>> Preview
> >>> workflow and then the Epson driver?
> >>>
> >>>
> >> Not sure but it is really very easy.  Print a step wedge with the
> >> workflow
> >> of your choice eg Epson Adv B&W with a particular set of
> >> settings.  Scan
> >> the
> >> step wedge with an EyeOne or other device that will provide the
> >> sort of
> >> data
> >> QTR Create ICC can read. ...
> >>
> >
> > I'm not sure I can even open Create ICC.  So far I just get a
> > momentary
> > flash on the monitor.
> >
> >
> >
> >
> >
> >>> Are those ICCs useable in the Print with Preview procedure
> >>> with the Epson driver?
> >>>
> >>
> >>
> >
> >
> >>   Yes I use them all the time.  I have profiled my Epson Adv B&W
> >> settings, one for each hue - neutral, warm, sepia and cool.  I do
> >> not mess
> >> with the darker and other settings (other than hue).  I prefer to
> >> edit the
> >> image in PS rather than in the driver which has limited editing
> >> ability.
> >>
> >
> > The possible advantage with using the driver controls as much as
> > possible is
> > that they may well be doing hardware linearization in the driver --
> > with no
> > loss of grayscale steps.  The ICC or TF in the Print with Preview
> > -- or
> > anywhere in PS -- loses some information with each transformation.
> >
> > Interesting stuff, but I don't seem to have an easy way to make the
> > ICCs at
> > this point.
> >
> > Paul
> > www.PaulRoark.com
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
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