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Bug #12270

Darktable-chart fails to open ColourCheckerPassport.cie

Added by William Brown over 1 year ago. Updated 3 months ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
General
Target version:
-
Start date:
07/24/2018
Due date:
% Done:

0%

Estimated time:
Affected Version:
2.4.4
System:
openSUSE
bitness:
64-bit
hardware architecture:
amd64/x86

Description

When using darktable chart with the provided ColourCheckerPassport.cie file, the following error is encountered.

"error with the IT8 file, can't find the SAMPLE_ID column"

The file is located: /usr/share/color/argyll/ref/ColorCheckerPassport.cie

I am attaching the provided cie file, but it's distributed as part of suse in argyllcms-1.9.2-2.2.x86_64

darktable-2.4.4-156.3.x86_64

ColorCheckerPassport.cie (4 KB) ColorCheckerPassport.cie William Brown, 07/24/2018 02:23 AM

History

#1 Updated by Teemu Mäntynen 8 months ago

William Brown wrote:

When using darktable chart with the provided ColourCheckerPassport.cie file, the following error is encountered.
"error with the IT8 file, can't find the SAMPLE_ID column"

I encountered the very same error message. Darktable 2.6.1, ArgyllCMS 2.0.1, Kubuntu 18.04.

I was able to circumvent the problem by following instructions found in here:
https://darktable-users.narkive.com/rOPvnnxT/anyone-know-where-to-find-a-cie-it8-file-for-the-color-checker-passport#post2

"The file ColorCheckerPassport.cie as shipped by Argyll uses "SAMPLE_LOC"
instead of "SAMPLE_ID" to refer to the colors. Just changing the line
SAMPLE_LOC XYZ_X XYZ_Y XYZ_Z LAB_L LAB_A LAB_B
to
SAMPLE_ID XYZ_X XYZ_Y XYZ_Z LAB_L LAB_A LAB_B
made it work for me."

#2 Updated by Bogdan Hlevca 3 months ago

I had the same issue an initially I added an extra columm SAMPLE_ID and increased the number of fields to 8. That did not work as I was getting

error with the IT8 file, can't find sample `WBL4'

The idea behind this came after looking at other cie files that had 8 fields, for example: /usr/share/color/argyll/ref/CMP_Digital_Target-4.cie

By the way, that failed has both SAMPLE_ID and SAMPLE_LOC

and fails with the same error

Reading this thread I replace LOC with ID and lefte the original 7 columns. The cie file was loaded, but the style generated with it has washed out colors and is practically unusable for practical purposes.

I believe that this needs investigation as it appears that the darktable-chart only does a good job with a reference image or as the original poster suggested here:
[[https://darktable-users.narkive.com/rOPvnnxT/anyone-know-where-to-find-a-cie-it8-file-for-the-color-checker-passport#post2]]
it may only work well it it8 files but not with cie files.

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