Re: [Lcms-user] How transform specific colors/ More informations.

[Kai-Uwe B. <ku...@gm...>]

Am 12.09.12, 07:54 -0000 schrieb PILLET Céline:
> I know how create a DeviceLink, but i don't know how specify specific colors :
> By exemple : I got a RGB color gray( 128 128 128)and i want specify in the output device link, that
> this RGB color will be transform in a CMYK color cyan (100% 0 0 0 ).
> Is it possible ?

That means you need a profiler to create a ICC profile for you. 
Which can later be used by a profle linking tool. Typical 
that involves creation of a CGATS text file, which contains the 
colour association. But those CGATS files are most often created in a 
automatic way and are not recommended to create by hand by novel users.

In case you are still interested look at ArgyllCMS:
http://www.argyllcms.com

A other way, is to provide the table entries of the colour transform 
yourself and create a ICC profile. lcms has API's for doing this on the 
appropriate low level. Using such API for your purpose involves 
interpolating the colours in a programmatic way.
See the API in lcms2.h under cmsStageSampleCLut16bit() and in the manual.

kind regards
Kai-Uwe Behrmann
-- 
developing for colour management 
www.behrmann.name + www.oyranos.org