Datacolor User to User Support Group.

>I've tried to read the QTr 51-gray target with PrintFix Pro 2.0 and to
>export the file to QTR-create-ICC in order to make a grayscale profile
>to be used with ABW on the Epson 3800 (I've followed the suggestions
>in the interesting Epson 3800 Diary by Giorgio Trucco at Outback
>Photo).
>I've measured the gray target with PrintFix Pro 2.0 andI've exported
>the measurements creating and renaming a file.All seems OK,but when I
>drag and drop the file to QTR-create-ICC I get a window showing no
>measurements(or part of them) and a warning "The Lab values are not in
>order.Cannot make a profile".
>Is PrintFix Pro unvalid as tool (Giorgio speaks of Eye-one,that I
>don't own)or am I missig anything?
>

No, that should work for QTR-create-ICC. How many steps of gray are
you measuring, though? All of the PFP code was done and tested with the
21 step QTR targets; if you're trying it with something else (I thought
the other options was 100 step, or so?) then maybe something needs to be
changed in PFP for that.

Same comment with the first set of measurements for QTR linearization.

The overall process (I haven't done this in months, but I'm working from
memory):

- Set up your ink limits, do all the rest of that initial QTR setup. Then
build a QTR "profile" (which are actually curves for the GIMP rip, it's not
an ICC profile) and print the 21 step gray through that.

- Measure it with the PFP 2.0 Measure tool and use the QTR override controls
to get the proper text formatting for the "LINEARIZE=" line that you'll paste
at the bottom of the QTR file. This should give you an ascending series of
density values. NOTE: the first few times I tried this, I had problems getting
QTR to build a profile from the resulting file, even though everything "should"
have been correct. Eventually I dug into old entries in the DigitalBlackAndWhite
list on Yahoo and found references to similar problems. It had to do with the
ink limits; once I changed those some more, rebuilt the original QTR profile
and reprinted/remeasured the 21 steps, it suddenly worked as it was supposed
to.

- Now you have a QTR profile that's got linearization. (based on your ink
limit setups, and whatever other QTR keywords you used, and the linearization
coming from the PFP measurements of density on the 21 step scale). You now
use THAT profile to reprint the 21 steps; then measure those again with
PFP 2.0, and this time, export the values into CreateICC format using the
override controls in the Measure dialog. This makes a text file in the format
that CreateICC expects (which is actually a Gretag Macbeth format...:-)
CreateICC -should- be able to swallow that file and produce the right results.

Try this with 21 steps, first, and see if you can get through the entire
workflow. Can you send me a copy of the file you're creating for CreateICC
so that I can have a look? Just email it to davem@...


Best regards,

-- 
David Miller
Senior Software Developer, Digital Color Solutions
ColorVision