[argyllcms] Re: ArgyllCMS: shadow details and blue color issues. What I'm doing incorrectly?

  • From: "Xavi" <aruiz@xxxxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Wed, 24 Oct 2012 20:32:29 +0200

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
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.


No of test patches = 4

1: 55.685061 1.050502 1.474861 <=> 50.000000 -0.000200 -0.000300  de

2: 50.098214 15.311162 47.347346 <=> 46.397000 13.620000 42.779000  de

3: 83.059447 2.768188 76.146682 <=> 82.000000 4.000400 80.000000  de

4: 43.876601 14.647638 20.301919 <=> 38.000000 14.000000 14.000000  de

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,


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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