[Digikam-users] Microstock and IPTC

[Leonardo Giordani]

Thank you for the useful information. Could you share your bash script?

Thanks

Leonardo

2009/9/6 Milan Knížek <knizek.confy at volny.cz>

> Leonardo Giordani píše v So 05. 09. 2009 v 19:28 +0200:
> > Hi all,
> >
> > since I'm trying to enter the microstock market I'would like to ask if
> > someone of you has experience in this field (with digiKam of
> > course :) ) and expecially if you can provide me some advice on IPTC
> > tags. In particular:
> >
> > 1. What tags are needed (or almost useful) and where to find them on
> > digikam IPTC editor: for example I know that TITLE is a needed tag but
> > I do not find it; the first tag I find is Content|Summary, and do not
> > know if they are the same.
> >
> You would have to check with Microstock what they mean by "TITLE". Most
> probably "HeadLine" or "ObjectName"?
>
> You can also have a look at IPTC web site, or directly at one of the
> documents describing the tags:
>
> http://www.iptc.org/std/photometadata/specification/IPTC-PhotoMetadata(200907)_1.pdf<http://www.iptc.org/std/photometadata/specification/IPTC-PhotoMetadata%28200907%29_1.pdf>
> (page 27 compares the tags with Photoshop XMP).
>
> > 2. Is it possible to tag multiple images at once? For example I shoot
> > 20 photos in the same location: if I select all the photos and try to
> > edit IPTC tags I just get two additional "Previous" and "Next" button
> > to navigate the list of selected images but cannot set all of them on
> > the fly.
> >
> Not yet in digiKam. I use MaPiVi to edit IPTC location for multiple
> images at once (but do not touch other tags like keywords, caption, etc.
> not to interfere with the way digiKam synchronises metadata).
> > 3. Looking on microstock web sites I see that photos are also well
> > categorized by content  with a taxonomy: for example see this Fotolia
> > image http://www.fotolia.com/id/16535435 (a random one), where
> > Representative Category is set to Landscape>Water>Lake/Pond and
> > Conceptual Category to Leisure>Holiday>Tourism. Are those IPTC
> > categories or Fotolia ones? In the first case how can I set them? In
> > the IPTC editor I found a "Subject Information" tab, but the
> > navigation through standard reference codes is not usable (too many
> > codes, it is not hierarchical).
> >
> I do not know here, but can guess: First, you need to find out if these
> are "IPTC keywords" or "IPTC categories" tags. "IPTC categories" are
> depreciated from the standard, so I guess these are keywords.
>
> digiKam uses hierarchy in keywords (stored as Xmp.digiKam.TagsList and
> synchronised to Xmp.lr.hierarchicalSubject for Lightroom compatibility).
>
> However, IPTC standard does not define hierarchy for keywords and the
> keywords are sync'ed to IPTC without hierarchy by digiKam. We could
> consider it a bug, but some people may actually like it. (I do not
> mind.)
>
> You can test yourself in digiKam (edit caption, keywords, ratings, iptc
> data manually) and quickly see all the tags (at the end of the list):
>
> $ exiv2 -pa imagename.jpg | less
>
> Since I store various information (incl. personal notes, which I do not
> want to get published on the internet) in the metadata, before
> publishing I use a bash script to re-organise the metadata to fit my
> needs.
>
> You could do the same: copying the hierarchy from XMP to IPTC keywords
> and then deleting everything but IPTC. exiv2 or exiftool would be your
> friends there.
>
> I can imagine that in the future, digiKam could have an export plugin
> allowing the user to define what information (a single branch in
> keywords hierarchy, no ratings, etc.) should be exported and how (in
> which standard).
>
> regards,
>
> Milan Knizek
> knizek (dot) confy (at) volny (dot) cz
> http://www.milan-knizek.net - About linux and photography (Czech
> language only)
>
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