QTR-Quadtone RIP

I have just printed Step-51-random.tif, run MeasureTool and measured
the three strips as strip-without-gaps. When I put the saved .txt file
into QTR-Create-ICC it tells me the Lab values are not in order and it
can't make the profile. And yes, I observe some Lab values out of
order in the "out" text file.

I have repeated the measurement multiple times. I tried measuring as
patches but I couldn't properly center the spectrophotometer on the
patches, so it had the same problem only worse.

What might be wrong and how do I correct it?

I am running QTR v. 2.6.1.0, with CreateICC dated 9/18/2007.

Thank you,

  - susan

So measure tool reports the readings in the "random" order of the
print out and you need to sort the results before you give them to
QTR-Create-ICC. I do this in Excel. Don't sort by the actual Lab
reading, sort by the expected value. That way if you really do have
some out of order readings, QTR-Create-ICC  will warn you.

Mike

2008/10/10 slcphoto73 <slchapin@...>:

> I have just printed Step-51-random.tif, run MeasureTool and measured
> the three strips as strip-without-gaps. When I put the saved .txt file
> into QTR-Create-ICC it tells me the Lab values are not in order and it
> can't make the profile. And yes, I observe some Lab values out of
> order in the "out" text file.
>
> I have repeated the measurement multiple times. I tried measuring as
> patches but I couldn't properly center the spectrophotometer on the
> patches, so it had the same problem only worse.
>
> What might be wrong and how do I correct it?
>
> I am running QTR v. 2.6.1.0, with CreateICC dated 9/18/2007.
>
> Thank you,
>
> - susan
>
>

Actually on reflection I don't think you need to sort them.
I do that because I like to view a graph of the results before I give
it to QTR-Create-ICC.

I presume your out of order values are in the dark blacks?
If so then your problem is simply that you are putting down too much ink.

Mike

2008/10/10 Michael King <drmrking@...>:

> So measure tool reports the readings in the "random" order of the
> print out and you need to sort the results before you give them to
> QTR-Create-ICC. I do this in Excel. Don't sort by the actual Lab
> reading, sort by the expected value. That way if you really do have
> some out of order readings, QTR-Create-ICC  will warn you.
>
> Mike
>
> 2008/10/10 slcphoto73 <slchapin@...>:
>> I have just printed Step-51-random.tif, run MeasureTool and measured
>> the three strips as strip-without-gaps. When I put the saved .txt file
>> into QTR-Create-ICC it tells me the Lab values are not in order and it
>> can't make the profile. And yes, I observe some Lab values out of
>> order in the "out" text file.
>>
>> I have repeated the measurement multiple times. I tried measuring as
>> patches but I couldn't properly center the spectrophotometer on the
>> patches, so it had the same problem only worse.
>>
>> What might be wrong and how do I correct it?
>>
>> I am running QTR v. 2.6.1.0, with CreateICC dated 9/18/2007.
>>
>> Thank you,
>>
>> - susan
>>
>> 
>

Thanks, Michael. I might be putting down too much ink; I'll try
adjusting that. What would your recommendation be for how, using the
Epson ABW driver on a 3800?

If I want to try your Excel trick, so I can see what is out of order
without relying on create-icc.exe, (I am very ignorant when it comes
to Excel): how do I get the values into Excel and which field in the
.txt file is the expected reading?

Also interestingly, when I look at the .txt files from a strip mode
reading of the original .tif file and a patch mode reading of the same
file stretched huge so each patch is about 1" on a side, the values
are noticeably different. Photoshop reports the same RGB values in
both, and they are printed on the same piece of paper using the same
ABW settings, so do I deduce that MeasureTool can't handle the tiny
squares in strip mode? 

Warmly appreciative of your help,

  - susan

--- In QuadtoneRIP@yahoogroups.com, "Michael King" <drmrking@...> wrote:
>
> Actually on reflection I don't think you need to sort them.
> I do that because I like to view a graph of the results before I give
> it to QTR-Create-ICC.
> 
> I presume your out of order values are in the dark blacks?
> If so then your problem is simply that you are putting down too much
ink.
> 
> Mike
> 
> 2008/10/10 Michael King <drmrking@...>:
> > So measure tool reports the readings in the "random" order of the
> > print out and you need to sort the results before you give them to
> > QTR-Create-ICC. I do this in Excel. Don't sort by the actual Lab
> > reading, sort by the expected value. That way if you really do have
> > some out of order readings, QTR-Create-ICC  will warn you.
> >
> > Mike
> >
> > 2008/10/10 slcphoto73 <slchapin@...>:
> >> I have just printed Step-51-random.tif, run MeasureTool and measured
> >> the three strips as strip-without-gaps. When I put the saved .txt
file
> >> into QTR-Create-ICC it tells me the Lab values are not in order
and it

> >> can't make the profile. And yes, I observe some Lab values out of
> >> order in the "out" text file.
> >>
> >> I have repeated the measurement multiple times. I tried measuring as
> >> patches but I couldn't properly center the spectrophotometer on the
> >> patches, so it had the same problem only worse.
> >>
> >> What might be wrong and how do I correct it?
> >>
> >> I am running QTR v. 2.6.1.0, with CreateICC dated 9/18/2007.
> >>
> >> Thank you,
> >>
> >> - susan
> >>
> >> 
> >
>

Susan,

Sorry I just don't have the time to walk you though this in detail.

You might be better using Eric's 3800 ABW ICC profiles available here.
http://people.csail.mit.edu/ericchan/dp/Epson3800/abwprofiles.html

Or if you really want to create your own profiles, at least use his
recommended settings and it should give you an ink load that's
acceptable to QTR Create ICC.

Mike



2008/10/10 slcphoto73 <slchapin@...>:

> Thanks, Michael. I might be putting down too much ink; I'll try
> adjusting that. What would your recommendation be for how, using the
> Epson ABW driver on a 3800?
>
> If I want to try your Excel trick, so I can see what is out of order
> without relying on create-icc.exe, (I am very ignorant when it comes
> to Excel): how do I get the values into Excel and which field in the
> .txt file is the expected reading?
>
> Also interestingly, when I look at the .txt files from a strip mode
> reading of the original .tif file and a patch mode reading of the same
> file stretched huge so each patch is about 1" on a side, the values
> are noticeably different. Photoshop reports the same RGB values in
> both, and they are printed on the same piece of paper using the same
> ABW settings, so do I deduce that MeasureTool can't handle the tiny
> squares in strip mode?
>
> Warmly appreciative of your help,
>
> - susan
>
> --- In QuadtoneRIP@yahoogroups.com, "Michael King" <drmrking@...> wrote:
>>
>> Actually on reflection I don't think you need to sort them.
>> I do that because I like to view a graph of the results before I give
>> it to QTR-Create-ICC.
>>
>> I presume your out of order values are in the dark blacks?
>> If so then your problem is simply that you are putting down too much
> ink.
>>
>> Mike
>>
>> 2008/10/10 Michael King <drmrking@...>:
>> > So measure tool reports the readings in the "random" order of the
>> > print out and you need to sort the results before you give them to
>> > QTR-Create-ICC. I do this in Excel. Don't sort by the actual Lab
>> > reading, sort by the expected value. That way if you really do have
>> > some out of order readings, QTR-Create-ICC will warn you.
>> >
>> > Mike
>> >
>> > 2008/10/10 slcphoto73 <slchapin@...>:
>> >> I have just printed Step-51-random.tif, run MeasureTool and measured
>> >> the three strips as strip-without-gaps. When I put the saved .txt
> file
>> >> into QTR-Create-ICC it tells me the Lab values are not in order
> and it
>> >> can't make the profile. And yes, I observe some Lab values out of
>> >> order in the "out" text file.
>> >>
>> >> I have repeated the measurement multiple times. I tried measuring as
>> >> patches but I couldn't properly center the spectrophotometer on the
>> >> patches, so it had the same problem only worse.
>> >>
>> >> What might be wrong and how do I correct it?
>> >>
>> >> I am running QTR v. 2.6.1.0, with CreateICC dated 9/18/2007.
>> >>
>> >> Thank you,
>> >>
>> >> - susan
>> >>
>> >>
>> >
>>
>
>

Thanks, Michael. I got create-icc.exe to work by decreasing the Optical
Density by 3. But the result soft-proofs as rather flat.

 

The reason I am doing this is that I have some Entrada 190 weight paper and
I really want to use the sheet feeder, but the surface is mostly like
Watercolor Radiant White, and the @!*@*! Epson driver won't let me use the
sheet feeder with WRW media type. So I am telling the driver the media is
Enhanced Matte, but then I need to compensate somehow, and I thought a
profile would do the job.

 

Someone ought to tell Epson that we often use 3rd party papers - oh, I guess
they are all too aware of that. Maybe I'll get a Canon printer next time.

 

  - susan



[Non-text portions of this message have been removed]

--- In QuadtoneRIP@yahoogroups.com, "slcphoto73" <slchapin@...> wrote:
>

I'm not using QTR-Create-ICC but I had this error message also 
sometimes in the QTR curve creation tool. In my case the problem was 
the 51 step wedge. The noise in the measurements may be larger than the 
actual differences between the consecutive steps. After I switched to 
the 21-step wedge the problem disappeared. 

Joost