Possibility to convert csv-file with only L*A*B* values into a ArgyllCMS ti3 file

[pharmacist]

Yesterday I received a cheap aliexpress colorimeter that measures patches on surfaces and it gets only LAB-values registered. Is there somebody here, who is capable to convert this csv file into a CGAT compatible value so it can be converted to a ti3 file. My idea is to use this cheap colorimeter as a poor man's spectro to generate printer profiles. I already created a 228 patch target with 1.4x1.4 cm large patches so the target can be easily read with this colorimeter. The device can read D50/D55/D65 etc including with/without UV included so I think with the right software and conversion it should be capable device to do so. All help is appreciated. I will upload the files this evening.

 

[pharmacist]

From the luminous landscape website I have found this:

https://forum.luminous-landscape.com/index.php?topic=131848.0

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Good day.
Thank You everybody for answers.

I got RGB value from my .ti2 file and inserted in .ti3 file and add my measured lab data (by Excel):

CTI3

DESCRIPTOR "Argyll Calibration Target chart information 3"
ORIGINATOR "Argyll printread"
CREATED "Tue Aug 20 19:16:40 2019"
DEVICE_CLASS "OUTPUT"
COLOR_REP "iRGB_LAB"

NUMBER_OF_FIELDS 7
BEGIN_DATA_FORMAT
SAMPLE_ID SAMPLE_LOC RGB_R RGB_G RGB_B LAB_L LAB_A LAB_B
END_DATA_FORMAT

NUMBER_OF_SETS 441
BEGIN_DATA
1 "A1" 47.45098 23.13725 0.00000 25.13 10.5 14.31
2 "A10" 57.64706 17.64706 38.43137 24.51 21.49 -2.15
3 "A11" 0.00000 59.60784 48.23529 21.54 -24.67 -17.43
....
END_DATA

and built profile without error.

Another way is use argyll fakeread tool and
create a .ti3 file from .ti1 file, and paste L*a*b* values into the .ti3 file.

I hope it is correct

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So essentially I have to use fakeread.exe to generate a dummy ti3 file and paste the LAB data of my el cheapo colorimeter generated csv file into this ti3 file and generate the target. I will give it a try this evening and report back and if succesfull I will compare it with a profile made with the more advanced i1Pro2 with the same ink/printer/paper combination. Finger crossed....

 

[crenedecotret]

Hi.. You could try using chartread with the -x switch. There is probably a way to feed your CSV data through STDIN

Something like

type data.csv | chartread -xl profile

I'm not 100% sure it will work.. Do you have any files you could send me? I could try to figure it out

 

[crenedecotret]

Here is some info from our spyderchart thread where I was able to read an export from the datacolor software directly into argyllcms.

https://www.printerknowledge.com/th...-patch-target-to-i1profiler.16879/post-144507

 

[pharmacist]

This is the upload of the files in a single zip file. NOTE: I probably have read each row in reverse order (So instead A1>A19 I did read from A19>A1, so each set of 19 readings should probably be reversed in order to fit into the ti3 file, as each row has 19 patches and in total 12 rows).

The testprofile.csv contains the readings in LAB values of the patches (each 19 values should be reverse in orde) The rest of the files are the ti1 and the ti2 files in order to inject the values of the csv file to creat the final ti3 file. Yesterday I did try it but the patch order seems to be so scrambled to me I did not know what values to inject into which row line.

 

[pharmacist]

I took the time to reread the patches again, this time hopefully in the right configuration from A1-A19, B1-B19....up to the last row. @crenedecotret: I suggest to use this csv file to have a look at (others are also invited to have a look at).