[argyllcms] Re: New user - chartread error
- From: "tony22p" <tony22p@xxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Thu, 30 Jun 2011 08:19:35 -0400
Hmm, my Canon Pro9000 MarkII is supposed to be able to print via a 16 bit data
path. They supply a XPS printer driver which runs in Windows 7 (I’m in Win7
x64), which supports this. This is my default driver for this printer and one
which I’ve used with Photoshop for a while. I opened the test charts in PS
without converting to a working space, and it opened as a 16 bit image.
Printing of course was done with no color management. I’ve done this before
with other print profiling solutions and have not run into the problems I’m
having now.
However, one can always learn something by trying. I will try an 8 bit target
to see what happens.
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx] On
Behalf Of Nikolay Pokhilchenko
Sent: Thursday, June 30, 2011 2:24 AM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: New user - chartread error
Graeme, here were my original generation commands:
targen -v -d2 -G -f2310 -g256 -s256 name
printtarg -v -ii1 -T360 -p203x254 name
May be Your printing software can'd deal with 16-bit tiffs? And there was patch
miss-coloring when you've printed the charts?
Are the chart images on display looks like the printed images? Can You view the
chart images through another image viewing program for reference? If Your
program haven't correct support of 16-bit images, it can display and print
these files equally wrong. I'd recommend You to re-generate the charts with
8-bit tiffs:
printtarg -v -ii1 -t360 -p203x254 -Q8 name
-----Original Message-----
From: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
On Behalf Of Graeme Gill
Sent: Wednesday, June 29, 2011 10:36 PM
To: argyllcms@xxxxxxxxxxxxx
Subject: [argyllcms] Re: New user - chartread error
tony22p wrote:
> Alastair, I tried re-reading the first row (A) after having recreated the
> ti2 file from the seed number. I got the same error. It thinks I'm reading
> row CD and not row A.
Note that such warnings are not 100% reliable, particularly if
you did not use a realistic profile as an argument to targen -c.
But it is suspicious if every read gives this warning, and if the expected
values differ wildly from the values you are reading. Very high self-fit
delta E's
in colprof would confirm a mis-read chart.
Graeme Gill.
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