[argyllcms] Re: Devicelink Black Generation

  • From: Klaus Karcher <lists@xxxxxxxxxxxxxxxxx>
  • To: argyllcms@xxxxxxxxxxxxx
  • Date: Thu, 07 Aug 2008 14:44:55 +0200

Fabrizio Levati schrieb:

Klaus,
No luck even with littleCMS.
I tried the option you suggested, then I read again what you posted and
realized that the ISOnewspaper26v4.icc I am using had a GCR with maxK
limited to 95%. At this point I tried editing the original profile and
recreated the DVLP but, as soon as I use the profile to convert my PDF file
(I am using Callas PDF toolbox to do so), I get my 100K text transformed to
something like 78C 72M 62Y 81K that is by the way exceeding the original
profile TAC limit.
Any idea about where am I going wrong?



... here is my very crude proof of concept:

kmb:~ klaus$ mkdir fabrizio

kmb:~ klaus$ cd fabrizio/

kmb:fabrizio klaus$ curl http://www.color.org/IFRA26L.txt -o IFRA26L.txt

kmb:fabrizio klaus$ logo2cgats IFRA26L.txt IFRA26
kmb:fabrizio klaus$ colprof -kr -l240 -L100 -cpp -dpp -S /Library/ColorSync/Profiles/ISOwebcoated.icc IFRA26
kmb:fabrizio klaus$ icclink -t0 -f1 -o web2news_lcms.icc /Library/ColorSync/Profiles/ISOwebcoated.icc IFRA26.icc 

kmb:fabrizio klaus$ icclu -s100 web2news_lcms.icc
0 0 0 0
0.000000 0.000000 0.000000 0.000000 [CMYK] -> Lut -> 0.000000 0.000000 0.000000 0.000000 [CMYK] 
0 0 0 10
0.000000 0.000000 0.000000 10.000000 [CMYK] -> Lut -> 0.000000 0.000000 0.000000 10.502785 [CMYK] 
0 0 0 50
0.000000 0.000000 0.000000 50.000000 [CMYK] -> Lut -> 0.000000 0.000000 0.000000 63.166247 [CMYK] 
0 0 0 100
0.000000 0.000000 0.000000 100.000000 [CMYK] -> Lut -> 0.000000 0.000000 0.000000 100.000000 [CMYK] 

Klaus

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