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

pharmacist

pharmacist

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The software under Windows gives this as scan values:

1757700826198.png


1757700887749.png


1757700934421.png


1757701519166.png


There is no much information about how to use this device: I have chose M0 /D50 at 2 degrees angle . Not sure in the UV-setting I should choose UV400 or not ???

Anyhow It picks up the color patches in LAB values.
 
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x64

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So the luminance data is available!

I used it to create a simple script to do a lab to xyz conversion, and generated a sample conversion of some of your attached zip and csv files. To avoid a deep dive into the Argyll software to save a few cents, before we try again, deliver a properly prepared scenario (ti1, ti2, correctly scanned csv, known good ti3 file created using compatible scanner).

Attached is the sample output .ti3 (renamed to .txt for upload compliance), I used the data from the 288-target.ti1 and testprofile v2.csv.
 

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pharmacist

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Hi x64,

I got this when trying to create the profile:

1757765041571.png


It reads only 200 sets and expected 228 sets.....

I changed some description too like Colore Rep into iRGB_LAB (was i1RGB_XYZ).
 

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Epatcola

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pharmacist said:
It reads only 200 sets and expected 228 sets.....
Click to expand...
The file says NUMBER_OF_FIELDS = 7 while the DATA_FORMAT statement has 8 fields.

228 * 7/8 = 200

Looks like it just reads data elements according to the data format ignoring new lines.

Are you sure argyll needs RGB and XYZ values anyway? If you can generate them from Lab then argyll could as well.

It looks like chartread with -L and -n switches creates a ti3 file with only Lab values. I presume if such a file isn't useful it wouldn't allow creation of it.

Is the colorimeter you got one of these https://en.chnspec.com/Product/list.aspx?lcid=228 ?
 
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pharmacist

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Yes I get it....unfortunately there is te sample_Loc that is gone. I have to merge it with the ti2 file I think.

No the colorimeter is this one:

https://nl.aliexpress.com/item/1005...t_main.10.191b1802jFySiv&gatewayAdapt=glo2nld

The CR30

Strangely enough the Spyderprint4 also gives LAB values.....I might think that it should be able to use LAB values only to generate a profile.

The ti3 is a fake one: I tried to paste the values that @x64 created into a dummy ti3 file, hoping it would work, but it did not unfortunately.
 
x64

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Epatcola said:
The file says NUMBER_OF_FIELDS = 7 while the DATA_FORMAT statement has 8 fields.
Click to expand...
In my example, the NUMBER_OF_FIELDS is correct:

SAMPLE_ID RGB_R RGB_G RGB_B XYZ_X XYZ_Y XYZ_Z (7 fields)

Pharmacist introduced SAMPLE_LOC to the configuration (field 2 out of 8) but did not add the location index to the sets:

1 0.00000 0.00000 0.00000 7.404274 5.772079 12.826289 (7 fields)

But the SAMPLE_LOC field is optional, and out of scope for what we are trying now.

Looking at your screenshots this spectrometer can create a lot more output than what you produced with the current config (e.g. spectral data). I took a quick look at the .ti3 specification and we can definitely generate straight from lab with argyll. Do a deeper investigation of what data we can produce with this spectrometer, what argyll accepts (and in what format we need to provide to comply)
 
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