Hi Craig,
craig.revie(a)ffei.co.uk wrote Tue, 26 Apr 2005 17:31:21 +0100
Hi Olaf,
I have been looking at your presentation and look forward to discussing
it in further detail next week at the ICC meeting. In the meantime I
have some simple questions:
(1) You mention as part of your proposed solution:
"output intent must consist of
- CMYK output profile
- information about tone value increase"
What information do you think the tone value increase would add to that
already present in the ICC profile? Have you considered the possibility
that TVI can be estimated from the ICC profile?
that's a good point - I haven't looked into that possibility yet. Are
there generally available sources describing this? Is it possible to
identify different TVIs for the process color channels (if they happen to
be different)?
There may also be better
measures for the future than that of TVI, for example a measure of dE
relative to the paper. This measure is available from the ICC profile.
How could this be used to adjust tint values of a given color channel?
This would mean that PDF/X-3 documents already meet
this part of your
requirement.
That may be true, and it would be sufficient to simply promote this concept.
(2) The addition of a new rendering intent [Maintain
Colorants] is an
interesting idea but I think needs further definition.
It is clear how the 'Maintain Colorants' intent should map colours that
use only a single colorant but how should C=M=50% be mapped? And what
about CMYK [20,30,10,20]?
My idea is that it would be used on a per colorant basis (regardless of
how many channels happen to be there for the given color space), so each
of CMYK [20,30,10,20] independent of the other channels. It's also
important to keep in mind that it only is applicable to device colors.
Best regards,
Olaf
Best regards,
_Craig
----------------------------------------------------------------------------
CONFIDENTIALITY AND DISCLAIMER NOTICE
This message and any attachment is confidential and is protected by
copyright. If you are not the intended recipient, please email the sender
or telephone +44 (0)1442 213440 and delete this message and any
attachment from your system. Dissemination and or copying of this email
is prohibited if you are not the intended recipient.
We believe, but do not warrant, that this email and any attachments are
virus free. You should take full responsibility for virus checking.
No responsibility is accepted by FUJIFILM Electronic Imaging Limited for
personal emails or emails unconnected with FUJIFILM Electronic Imaging
Limited's business.
----------------------------------------------------------------------------
_______________________________________________
bcm mailing list
bcm(a)lists.callassoftware.com
http://lists.callassoftware.com/mailman/listinfo/bcm