Hello Marti.
Thanks for your answer.
My results are different from those of Photoshop.
Now I'm trying to get the same color in monitor as the one in a CMYK
Photoshop document.
I´m trying the following:
transicc -i *Lab -o ISOnewspaper26v4.icc -t1
C = 100, M = 0, Y = 0, K = 0
My results are:
L = 70.0934, A = -28.1484, B = -36.5586
I guess I can convert this Lab color, to display the CMYK pure cyan color
into monitor.
transicc -i *Lab -o CalibratedDisplay... -t1
The RGB result is different from the one showed in Photoshop. Could it be
that Photoshop is doing badly the CMYK painting?
Thanks.
2014-02-13 11:52 GMT+01:00 <marti.ma...@littlecms.com>:
>
> Hi Victor,
>
> · I create a doc CMYK with color profile Iso.
>>
>> · I create a doc RGB with color profile Adobe.
>> · I select color 100% pure cyan.
>> · I paint the docs with this pure cyan.
>>
>> The results are different in monitor.
>>
>
> That is the expected behavior. In the CMYK space this corresponds
> to a color which is different in RGB space. If you want the same
> color, use the same Lab values. I.e. crate the CMYK doc, then
> "convert to profile" and use AdobeRGB as destination.
>
>
> I´ve used transicc to obtain the color displayed on monitor and it´s the
>> same in RGB docs but, what is sequence for CMYK docs?
>>
>
> To get the same color, take the Lab value and convert it to
> AdobeRGB.
>
> transicc -i ISOnewspaper26v4.icc -o AdobeRGB1998.icc -t1
> LittleCMS ColorSpace conversion calculator - 4.2 [LittleCMS 2.06]
>
> Enter values, 'q' to quit
> C? 100
> M? 0
> Y? 0
> K? 0
>
> R=103.6409 G=186.1771 B=234.5724
>
> This is the value of that color in AdobeRGB. Now you may want to
> use your calibrated display to view that color:
>
> transicc -i AdobeRGB1998.icc -t1 -o CalibratedDisplay.icc
>
> This can be done in a simple step without going across AdobeRGB
>
> transicc -i ISOnewspaper26v4.icc -o CalibratedDisplay.icc -t1
>
> Make sure to use relative colorimetric intent in all paths,
> this may well be the source of discrepancies you report.
>
> Regards
> Marti
>
>
>
>
>
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