Digital BW, The Print

Bob Marsolais wrote:
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
> <roy@...> wrote:
> 
>> There is one other issue with grayscale handling.  Some editing,
> image processing
>> programs themselves do not handle grayscale image files.  This
> includes some 
>> majors ones like: InDesign, Lightroom, Aperture and Qimage.
> 
> I asked Jonathan Saks, the author of PictureWindowPro, whether PWP
> recognized gray scale ICC's.  His answer was, "No it does not.
> However, a gray profile is just a curve."
> 
> I keep seeing the mention of ICC's with imbedded curves.  (I don't
> think this is what Jonathan meant, IMO.)  Is an "ICC with imbedded
> curves" an ICC plus a curve or a completely self-contained ICC?  What
> is meant by "ICC with imbedded curves"?

There's a bit of a misunderstanding here I think. Qimage 
doesn't work correctly with the QTR grayscale profiles but 
there's no issue when you use a QTR RGB paper profile in 
Qimage and feed it with greyscale files with 2.2 Gamma or 
the QTR Lab profile. That Qimage translates that to an RGB 
image internally doesn't influence the outcome with for 
example the ABW drivers of Epson and HP. At least it works 
for me.

With PWP I have seen problems with both the QTR RGB and the 
QTR Lab profiles, odd BPC influences and more. With both the 
LittleCMS and the M$ (Heidelberg) color engine. To a degree 
that I more or less dropped PWP use in total.


Met vriendelijke groeten,  Ernst


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