[tex-live] ICC profiles for PDF/A compliance

[Ross Moore]

Hi all.

We got a report today of the missing sRGB Profile, when processing
a document using  pdfx.sty .

So we need to finalise this.
I’ve started to work on a revised package, but it means:
*  including an  sRGB  profile, and
*  adjusting  pdfx.sty  for the new default name.
*  revising some documentation.

On 14 Sep 2018, at 1:30 pm, Peter Selinger <selinger at mathstat.dal.ca<mailto:selinger at mathstat.dal.ca>> wrote:

Yes, why not. The /usr/share/color/argyll/ref/sRGB.icm profile is also
free, it states "Created by Graeme W. Gill. Released into the public
domain. No Warranty, Use at your own risk.”

Nice and simple, but how do I get the file?
It’s from a Linux distribution. I’m on MacOS.

Aaah, here it is:   http://www.argyllcms.com/sRGB.icm
but where is a simple License statement to be found?



An alternative is from ICC, with Licence:

"This profile is made available by the International Color Consortium, and may be copied, distributed, embedded, made, used, and sold without restriction. Altered versions of this profile shall have the original identification and copyright information removed and shall not be misrepresented as the original profile."

http://www.color.org/srgbprofiles.xalter#v2
It downloads as  sRGB2014.icc  when you click:  “accept licensing terms”
The actual URL is    http://www.color.org/profiles/sRGB2014.icc .

So I can go with this straight away, if that’s acceptable to everyone.



I don't have personally prefer one sRGB profile over another. Since
that website makes a careful investigation and reasoned argument, it
is better than no data at all, so why not go with that one then.

-- Peter

Norbert Preining wrote:
>
> Dear Peter, dear all,
>
> > sRGB.iccprofile.xml
> > sRGB.icc
> > FOGRA39L_coated.iccprofile.xml
> > FOGRA39L_coated.icc
>
> Thanks a lot.
>
> BUT ...
>
> I was pointed in private by a pdfx user to
> https://ninedegreesbelow.com/photography/srgb-profile-comparison.html<https://protect-au.mimecast.com/s/R0R0CBNqgBCVgYvgTjQA7t?domain=ninedegreesbelow.com>
> which gives a *very* detailed and interesting comparison, though
> slightly dated (2012/2015) of different sRGB color profiles, and argues
> strongly in favor of the Argyllcms sRGB profile as being the one closest
> to the specification with the best properties.
> https://www.argyllcms.com/<https://protect-au.mimecast.com/s/IT1FCD1vRkCBR4XRcl4M4p?domain=argyllcms.com>

Yeah, but I couldn’t find a licence that clearly applied just to the color Profile.
The whole Argyll CMS system is under
    GNU  AFFERO GENERAL PUBLIC LICENSE
which probably does allow us to take just a single file.
But I don’t really want to include all of that, when a couple of sentences suffices.


> The original mail to me also contained the following statement
> > Regarding other sRGB profiles, there are some that are also close to the
> > specification, but there are others that have got a different white
> > point, a different tone response curve or a different black point.
> > Please try to avoid the latter.
>
> The file contained in the argyll-ref package in Debian is
> /usr/share/color/argyll/ref/sRGB.icm
>
> The discussion at the above mentioned web site - although I couldn't
> check all the details - makes me somehow tempted to use the sRGB from
> ArgyllCMS.
>
> Peter, what is your opinion on this?
>
> Thanks
>
> Norbert


Cheers,

Ross


Dr Ross Moore

Mathematics Dept | 12 Wally’s Walk, 734
Macquarie University, NSW 2109, Australia

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M:+61 407 288 255<tel:%2B61%20409%20125%20670>  |  E: ross.moore at mq.edu.au<mailto:rick.minter at mq.edu.au>

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