[argyllcms] Re: ArgyllCMS: shadow details and blue color issues. What I'm doing incorrectly?
- From: "Xavi" <aruiz@xxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Thu, 25 Oct 2012 01:22:10 +0200
Hi Nikolay.
Thanks for confirming that the deltaE values are disappointing.
"May be You poorly washed the head and ink path in the printer while
changing the inks? "
No. I haven't changed the inks. I have two Canon printers. A Pro9000MKII and
a MP540. I have changed the ink to the Pro9000 but on the MP540 I use a ink
from Image Specialists form some years ago. All the tests are did with the
MP540 and with the same ink then I discard any option of ink mixed.
The visual poblem that I see on my prints are a non neutral ramp of grays,
from black to white. I see some grey with magesta cast and other grays with
cyan cast.My test patch uses 64 grays. Then I suppose that it mus be
prectically neutral on all the ramp.
It is possible a error with the color management on my Windows 7 Ultimate or
in the printer driver?
I have found on internet some afirmationsas for instance: "Anybody that has
been the victim of a a Mac or Windows OS update that completely hosed their
color and printer settings and/or made it virtually impossible to disable
color management to profile their printer properly can maybe appreciate this
advantage of using RIP software."
and a reply to this question: "Why did Adobe get rid of
<http://forums.adobe.com/message/4372926#4372926> 'No Color Management'
option in CS5"
Reply: "Because the OS print pielines basically dis-allow it...actually only
the Mac completely disables it, but it's discourged on Windows."
I am worried about some issue on color management with Windows 7 and/or the
Canon printer drivers.
Thank you,
Best Regards,
Xavi.
_____
De: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
En nombre de Nikolay Pokhilchenko
Enviado el: miércoles, 24 de octubre de 2012 20:59
Para: argyllcms@xxxxxxxxxxxxx
Asunto: [argyllcms] Re: ArgyllCMS: shadow details and blue color issues.
What I'm doing incorrectly?
The results are disappointing. I hoped to see dE about 0,35-1,2. Delta of
4..9 are enormous for inkjet printer in order.
There is some source of the error. May be You poorly washed the head and ink
path in the printer while changing the inks? There is obvious difference in
printing process between initial target
MP_B01_396p64g3bArgyllv140_121011.ti3 and this small target. This is typical
for the case when the inks was changed and the profiling target was printed
with ink mixture (not so pure inks).
Wed, 24 Oct 2012 20:32:29 +0200 от "Xavi" <aruiz@xxxxxxxxxxx>:
Hi Nikolay.
Thank you for doing a ti3 file for me to try to check that everything is
correct on my case.
I have resized a little your tiff file because I have a colormunki and the
size of the patches were too small.
The patch 29,14,50 [Lab] is out of gamut but the original patch that I print
is diferent. The original was the blue color patch of the simulation color
checker chart: 29,14,-50 [Lab]
I haven't modified the colors of your file. Only the size to be read with
CM.
I have printed yout test4.tif using the ACPU utility from Adobe and exactly
the same media settings (I have recorded them as a preset). The test target
was also printed with ACPU. I use ACPU because after some tests, seems that
ACPU prints different than the PS CS4 disabling color management.
I have let dry for about 8 hours and I have read it using the same spectro
that was used for reading the test patches, and on strip mode.
The results of the verify.exe command are:
.\..\verify.exe -v -D test4_grans_ACPU_2.ti3 Test4_fakeread.
ti3
No of test patches = 4
1: 55.685061 1.050502 1.474861 <=> 50.000000 -0.000200 -0.000300 de
5.966573
2: 50.098214 15.311162 47.347346 <=> 46.397000 13.620000 42.779000 de
6.117908
3: 83.059447 2.768188 76.146682 <=> 82.000000 4.000400 80.000000 de
4.181966
4: 43.876601 14.647638 20.301919 <=> 38.000000 14.000000 14.000000 de
8.641068
No of test patches in worst 10% are = 0
No of test patches in best 90% are = 4
Verify results:
Total errors: peak = 8.641068, avg = 6.226878
Worst 10% errors: peak = 0.000000, avg = 0.000000
Best 90% errors: peak = 8.641068, avg = 6.226878
Are the expected results? If not, when do you think that can be the issue?
I attach the used ti3 file.
Thank you for your appreciate help.
Best Regards,
Xavi.
_____
De: argyllcms-bounce@xxxxxxxxxxxxx [mailto:argyllcms-bounce@xxxxxxxxxxxxx]
En nombre de Nikolay Pokhilchenko
Enviado el: miércoles, 24 de octubre de 2012 8:39
Para: argyllcms@xxxxxxxxxxxxx
Asunto: [argyllcms] Re: ArgyllCMS: shadow details and blue color issues.
What I'm doing incorrectly?
Wed, 24 Oct 2012 02:06:02 +0200 "Xavi" wrote:
Then, on Photoshop I create 4 rectangles, that I fill, one by one, with the
RGB values obtained. I save them on Tiff format and I print the file with
the same program and the same printing options that I have used to print the
test chart.
Hello, Xavi!
I think You can introduce the error at this stage because there may be a
difference between AgyllCMS chart image generation and the Photoshop.
Try to print the target in attached Test4.zip the same way as You have
printed the targets for MP_B01_396p64g3bArgyllv140_121011.ti3.
Then read the chart the same way as You've read
MP_B01_396p64g3bArgyllv140_121011.ti3 (I'd recommend the reading in the
strip mode, not patch-by-patch).
After reading, compare the targets:
verify.exe -v Test4.ti3 Test4_fakeread.ti3
And You'll see actual workflow errors.
By the way, the patch 29.000000 14.000000 50.000000 [Lab] is out-of-gamut
for Your printer. You can't check the tolerance by out-of-gamut colors. So,
it's Lab value was replaced by the nearest possible (by xicclu -fif then
-ff): 46.397 13.620 42.779
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