Hi,
Glad to see lcms worked for you. For the linearization, there is a ready-to
use function doing exactly that:
cmsCreateLinearizationDeviceLink(icColorSpaceSignature ColorSpace,
LPGAMMATABLE TransferFunctions[])
It creates a virtual device-link, working in "ColorSpace" (icSigCmykData in
your case) and applying "TransferFuntions" 1-D linearization ramps. You can
then link this profile to the output profile using
cmsCreateMultiprofileTransform. Note that the linearization should be done
AFTER the otuput profile, if you feeded the profililer with linearized data.
Hope this helps,
Marti.
Kai-Uwe Behrmann <[EMAIL PROTECTED]> said:
> Hi,
>
> first thanks for the quality work on the lcms library, Marti! I showed an
> calibrated print on the Chemnitzer Linuxtag and was unable to detect any
> failures on an modern state of art printer. Gray cloud regions were very
> constant, very much better than the manufacturer provided sample prints.
> Pale regions were shown very detailed.
> (My source images came from an sinar back and from RVP slides read in by
> an imacon 646. Dont know how to get better real world samples.)
>
> Now to my questions:
> I did an calibration of my printer and want to merge the linearisation of
> the RIP, I did before profile generation, back to the generated output
> profile.
>
> Did somebody manage to integrate an device link profile, from
> linearisation of the printer, into the final PCS-CMYK separation profile
> with lcms?
>
> I was able to put the device link profile cmyk->cmyk in an
> cmsMultiProfileTransform. Writing it out as profile means to obtain an
> Lab/Lab device link.
> The linearisation profile I created with lcms has the A2B0/mft2 tag.
> Unfortunately the generated profile has this tag as well but as cmyk->Lab.
> During the linearisation I created gamma tables in cmyk mode, cmyk->cmyk.
>
> I tried to read the tag of the separation profile into an LPGAMMATABLE, in
> order to merge the two gammas and write it back to the separation profile,
> but failed to load the A2B0 tag of booth profiles. Even so it seems
> difficult as the cmyk/cmyk and cmyk/Lab gamma tables dont match. I dont
> know how to proceede.
>
> Till now I tried to use lcms functions only. Is it possible to do, what
> I want, with the lcms library interface or do I need other methods outside
> lcms to finish the merge.
>
> Any help is appreciated. As well I would like to know about commercial
> tools to finish the task and give the profiles to the public.
>
> I like to release the code and people are already waiting for it :)
> Only they dont like to select each time two profiles for one printer they
> said to me.
>
> thanks
> Kai-Uwe
>
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by: IBM Linux Tutorials
> Free Linux tutorial presented by Daniel Robbins, President and CEO of
> GenToo technologies. Learn everything from fundamentals to system
> administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
> _______________________________________________
> Lcms-user mailing list
> [EMAIL PROTECTED]
> https://lists.sourceforge.net/lists/listinfo/lcms-user
>
--
-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click
_______________________________________________
Lcms-user mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/lcms-user
