saving tags and rating into IPTC tags...

[Gilles Caulier-2]

Hi all,

digiKam 0.9.0-svn use now Exiv2 instead libkexif at all (note : today i have
removed definitivly libkexif depency from digiKam core)

New horizon can be done using Exiv2, especially to save new metadata in image.

Many users have reported some request to save in image the Tags and Rating
informations into photograph like it does into databasein both of database.
This is can be done using IPTC metadata...

About digiKam Tags, i propose to use "Iptc.Application2.Keywords". From
www.iptc.org, the IPTC documentation (page 32) said :

2:25 Keywords :
              Repeatable, maximum 64 octets, consisting of graphic char-
              acters plus spaces.
              Used to indicate specific information retrieval words.
              Each keyword uses a single Keywords DataSet. Multiple key-
              words use multiple Keywords DataSets.
              It is expected that a provider of various types of data that are            
              re-lated in subject matter uses the same keyword, enabling the
              re-ceiving system or subsystems to search across all types of
              data for related material.

              Examples:
                       "GRAND PRIX"
                       "AUTO"


About digiKam Ratings, i propose to use "Iptc.Application2.FixtureId". From
www.iptc.org, the IPTC documentation (page 32) said :

2:22 Fixture
                Not repeatable, maximum 32 octets, consisting of graphic char-
                acters. Identifier Identifies objectdata that recurs often and
                predictably. Enables users to immediately find or recall such
                an object.
                Example:
                         "EUROW EATHER"

More informations about IPTC :

http://www.exiv2.org/iptc.html
http://www.iptc.org/IIM/4.1/specification/IIMV4.1.pdf

Let's me hear your viewpoints, and your feedback if you have already used an
another photo-management program running like this.

Regards

Gilles Caulier
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

Gilles Caulier wrote:

> Let's me hear your viewpoints, and your feedback if you have already used an
> another photo-management program running like this.

it's a very good thing to save the info data with the file.
with the present system, backing up the images data is
tedious (the place the database is matters).

good evolution :-)

jdd


--
http://www.dodin.net
http://dodin.org/galerie_photo_web/expo/index.html
http://lucien.dodin.net
http://fr.susewiki.org/index.php?title=Gérer_ses_photos
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Markus Spring]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Just my 0.02?:

* I greatly appreciate the possibility to write IPTC tags - this is definitely a
very useful enhancement

* regarding the saving of information in images, however I would strongly to
make it configurable in a very fine grained way

* I for my person definitely want to have my name and copyright/copyleft written
into the image - this could even be an automatic action after downloading the images

* however I myself am not sure if I would really want to save all keywords into
all my images. Having them in the database is just fine for me, others will
decide differently. Having a choice however is one of the things that makes
linux and its applications so appealing for me

* the possibility to export/import parts of the image library should be seen
separately from the issue of writing information into the images. However I
regard this as a missing feature, together with the topic of having off-line
stored images remaining in the database. Calculating a md5-checksum of the image
information to identify files seems to be a logical step in this contect

Ok, now it's 0.05? ;-)

Regards - Markus
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFEK/tFxxUzQSse11ARAmB9AJ9a6ckWpK5b+GOERPTxc2piSa5bdwCfbU9k
euLShQm8G+vqVh8pzD06M2o=
=q9k7
-----END PGP SIGNATURE-----
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-2]

Le Jeudi 30 Mars 2006 05:37 PM, Markus Spring a écrit :
> Just my 0.02?:
>
> * I greatly appreciate the possibility to write IPTC tags - this is
> definitely a very useful enhancement
>
> * regarding the saving of information in images, however I would strongly
> to make it configurable in a very fine grained way

sure at setup metadata dialog page.

>
> * I for my person definitely want to have my name and copyright/copyleft
> written into the image - this could even be an automatic action after
> downloading the images

camera gui improvement will be done later 0.9.0. There are a lot changes to
0.9.0.

>
> * however I myself am not sure if I would really want to save all keywords
> into all my images. Having them in the database is just fine for me, others
> will decide differently. Having a choice however is one of the things that
> makes linux and its applications so appealing for me

Saving rating is in svn. take a look in setup dialog and give me a feedback.

TODO :
- saving tags.
- fix scanlib to get rating and tags IPTC metadata like Comments and datetime
are does.


>
> * the possibility to export/import parts of the image library should be
> seen separately from the issue of writing information into the images.
> However I regard this as a missing feature, together with the topic of
> having off-line stored images remaining in the database. Calculating a
> md5-checksum of the image information to identify files seems to be a
> logical step in this contect

Later 0.9.0 : B.K.O

Gilles
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-2]

Le Jeudi 30 Mars 2006 05:05 PM, jdd a écrit :
> Gilles Caulier wrote:
> > Let's me hear your viewpoints, and your feedback if you have already used
> > an another photo-management program running like this.
>
> it's a very good thing to save the info data with the file.
> with the present system, backing up the images data is
> tedious (the place the database is matters).
>

The database is always updated. Nothing will be changed about. Not all image
file formats support metadata like Exif and IPTC. A database is necessary for
that.

Gilles
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

Caulier Gilles wrote:

> Le Jeudi 30 Mars 2006 05:05 PM, jdd a écrit :
>> Gilles Caulier wrote:
>>> Let's me hear your viewpoints, and your feedback if you have already used
>>> an another photo-management program running like this.
>> it's a very good thing to save the info data with the file.
>> with the present system, backing up the images data is
>> tedious (the place the database is matters).
>>
>
> The database is always updated. Nothing will be changed about. Not all image
> file formats support metadata like Exif and IPTC. A database is necessary for
> that.

yes, I know that. But the location of the database file
should be very clearly stated and how it can be saved/restored

thanks
jdd


--
http://www.dodin.net
http://dodin.org/galerie_photo_web/expo/index.html
http://lucien.dodin.net
http://fr.susewiki.org/index.php?title=Gérer_ses_photos
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Daniel Bauer-2]

As Gilles post is a bit to "computerish" for my skills (and I didn't really
understand what will be saved in the image files and what not), I'd like to
subscribe to the view of Markus:

Am Donnerstag, 30. März 2006 17:37 schrieb Markus Spring:
> Just my 0.02?:
>
> * I greatly appreciate the possibility to write IPTC tags - this is
> definitely a very useful enhancement

yes
>
> * regarding the saving of information in images, however I would strongly
> to make it configurable in a very fine grained way
>
> * I for my person definitely want to have my name and copyright/copyleft
> written into the image - this could even be an automatic action after
> downloading the images

yes, and/or the possibility to write name/copyright to all (selected) files at
once
>
> * however I myself am not sure if I would really want to save all keywords
> into all my images. Having them in the database is just fine for me, others
> will decide differently. Having a choice however is one of the things that
> makes linux and its applications so appealing for me

this is a very important point for me, too.

One should be able to differ clearly between "private" and "official" tags,
where the "private" tags are those used in the digikam album as it is now
(0.8.1) and the "official" tags are those that will be saved as IPTC tags to
the picture.

(for explanation of my point:
I use the tags in digikam for sorting my pictures to my personal needs. These
are private notes that are nothing to everybody else. In contrast to this
IPTC tags are ment for copyright information and tags that can be used by
agencies etc. So IPTC and digikam tags must be two clearly different things,
as I dont want my customers to know how I classify my photos in-house and on
the other hand, the "official" [published with the picture file] IPTC tags
are not very useful for my sorting work...)

> * the possibility to export/import parts of the image library should be
> seen separately from the issue of writing information into the images.
> However I regard this as a missing feature, together with the topic of
> having off-line stored images remaining in the database. Calculating a
> md5-checksum of the image information to identify files seems to be a
> logical step in this contect
>
> Ok, now it's 0.05? ;-)
>
> Regards - Markus

Sorry, if I explain too much at length. My english and computer knowledge are  
not that good and it could easily be that Gilles already did exactly this and
I just haven't understood. In this case I apologise for the noise...

Daniel

--
Daniel Bauer photographer Basel Switzerland
professional photography: http://www.daniel-bauer.com
special interest site: http://www.bauer-nudes.com
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-2]

Le Jeudi 30 Mars 2006 08:50 PM, Daniel Bauer a écrit :

> As Gilles post is a bit to "computerish" for my skills (and I didn't really
> understand what will be saved in the image files and what not), I'd like to
> subscribe to the view of Markus:
>
> Am Donnerstag, 30. März 2006 17:37 schrieb Markus Spring:
> > Just my 0.02?:
> >
> > * I greatly appreciate the possibility to write IPTC tags - this is
> > definitely a very useful enhancement
>
> yes
>
> > * regarding the saving of information in images, however I would strongly
> > to make it configurable in a very fine grained way
> >
> > * I for my person definitely want to have my name and copyright/copyleft
> > written into the image - this could even be an automatic action after
> > downloading the images
>
> yes, and/or the possibility to write name/copyright to all (selected) files
> at once
>
> > * however I myself am not sure if I would really want to save all
> > keywords into all my images. Having them in the database is just fine for
> > me, others will decide differently. Having a choice however is one of the
> > things that makes linux and its applications so appealing for me
>
> this is a very important point for me, too.
>
> One should be able to differ clearly between "private" and "official" tags,
> where the "private" tags are those used in the digikam album as it is now
> (0.8.1) and the "official" tags are those that will be saved as IPTC tags
> to the picture.
>
> (for explanation of my point:
> I use the tags in digikam for sorting my pictures to my personal needs.
> These are private notes that are nothing to everybody else. In contrast to
> this IPTC tags are ment for copyright information and tags that can be used
> by agencies etc. So IPTC and digikam tags must be two clearly different
> things, as I dont want my customers to know how I classify my photos
> in-house and on the other hand, the "official" [published with the picture
> file] IPTC tags are not very useful for my sorting work...)
>
> > * the possibility to export/import parts of the image library should be
> > seen separately from the issue of writing information into the images.
> > However I regard this as a missing feature, together with the topic of
> > having off-line stored images remaining in the database. Calculating a
> > md5-checksum of the image information to identify files seems to be a
> > logical step in this contect
> >
> > Ok, now it's 0.05? ;-)
> >
> > Regards - Markus
>
> Sorry, if I explain too much at length. My english and computer knowledge
> are not that good and it could easily be that Gilles already did exactly
> this and I just haven't understood. In this case I apologise for the
> noise...
>
> Daniel

No problem for the sound, Daniel, especially when it come from a
pro-photographer (:=)))

But my purpose of my mail is... witch IPTC tags is need to use to store
digiKam tags and rating informations !

My proposal is just a first approach. If you have already used a photo
managment software witch use IPTC with the same digiKam functionnalities
(under MAC or Win32), i would a feedback about that, to give a compatibily.

IPTC tas descriptions are very generic (take a look in IPTC spec. for
example), because IPTC isn't dedicaced to photograph only. We need to choose
the right tags to store digiKam information

Writting digiKam tags to IPTC ins't really difficult with Exiv2 library. Today
i have implemented Rating to IPTC implementation (to svn). Still digiKam tags
to do.

Regards

Gilles
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Daniel Bauer-2]

Am Donnerstag, 30. März 2006 21:21 schrieb Caulier Gilles:
> No problem for the sound, Daniel, especially when it come from a
> pro-photographer (:=)))
>
> But my purpose of my mail is... witch IPTC tags is need to use to store
> digiKam tags and rating informations !

I've read a long professional and in-deep article about the use of IPTC in the
picture market two month ago or so. I'll try to find it again over the
weekend and submit the info therein - if I find it...

As much as I remember rating informations are not interesting for IPTC,
because this is subjective and always only for "in-house"-use (to store in a
database but not in the picture). IPTC data should be descriptive in a more
objective way.

Lets say, you're a picture researcher. Then you search for "palm-lined beach
with tourists", but you would not search for a "good" picture, simply because
as an art buyer you assume that the pictures are "good" - and it's not
interesting info for you, if the photographer thinks, his picture is "top" or
"mediocre". If you don't like them it's again subjective and you can put this
info in your own database (that would be a digikam tag in my eyes) but not in
the IPTC of the file.

Well, ok, if people want to use IPTC tags for their personal notes, why should
they not be able to do it. But it's not for professionals and so one must
have the possibility to differentiate, what will be saved directly in the
picture file and what "only" in the digikam database. I'd even prefer if IPTC
and "digikam-tags" would be regarded as two fully independent features.

But ok, I'm gonna search for the article and then let you know what I found...
>
> My proposal is just a first approach. If you have already used a photo
> managment software witch use IPTC with the same digiKam functionnalities
> (under MAC or Win32), i would a feedback about that, to give a compatibily.

I haven't yet allthough I should have to... Until now I simply leave the work
of indexing to the agencies ;-) On Win the problem was, that such software is
far too expensive for me (and many others). So I guess, it's a great thing if
digikam can do this, too.
>
regards

Daniel
--
Daniel Bauer photographer Basel Switzerland
professional photography: http://www.daniel-bauer.com
special interest site: http://www.bauer-nudes.com
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Daniel Bauer-2]

I think I found the articles. As they are published in a members area I send
the saved pages to you as a private message. Hope it's interesting...

regards

Daniel

--
Daniel Bauer photographer Basel Switzerland
professional photography: http://www.daniel-bauer.com
special interest site: http://www.bauer-nudes.com
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Markus Spring]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi digikam-users,

re IPTC my proposal would be as such:

* Offer a broad range of IPTC fields to be filled in
* offer full configurability of the usage of fields and their location of
storage, i.e. in digikam db and or not in the image file itself
* A migration path to XMP data should be considered for the future.

I would consider such a matrix of selection fields:

IPTC field               used and stored in digikam          stored in the image
- --------------------------------------------------------------------------------
Caption                           0/1                              0/1
By-Line                           0/1                              0/1
Keywords                          0/1                              0/1
Credit                            0/1                              0/1
Copyright                         0/1                              0/1
City                              0/1                              0/1
Province/State                    0/1                              0/1
Country                           0/1                              0/1
Special Instructions              0/1                              0/1
Category                          0/1                              0/1
Headline                          0/1                              0/1
Source                            0/1                              0/1

If the user decides to select a field, then by default it will be stored in
digikam, the storage in the image can be selected additionally.

The Copyright field should offer the Creative Commons licenses in correct
nationalized form, including the link to the license on the web, additional
licenses can be filled in in free text forms (the licenses should be saved in a
database table)

I hope this helps in implementing a much wanted feature of this great program.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFELZu0xxUzQSse11ARAnRUAJwMvrych5SPkhAObHLiCxMsdYZ1igCcCt2+
uTe/6+c2a/vIuEsxmWNTL+8=
=A6Bg
-----END PGP SIGNATURE-----
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

Hi Digikam Developers,

Its nice to hear that all image editor plug-ins have been ported to support 16
bit images!
Regarding to this:
My camera's (Canon 350D) output can be two different file types. Either an 8 bit
JPG or a 12 bit RAW. How can I efficiently use digikam's 16 bit support? Using
the built-in dcraw RAW converter? What will this conversion do with the 12 bit
RAW images? Will it convert them into 16 bit data with some extrapolation?

By the way: is there any camera on the market that supports _real_ 16 bit images
   (real means the A/D conversion and all the signal processing is done on 16
bits inside the camera) ?

Thanks!
Gabor Dudas
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

Hi,

I am playing with raw conversion and white balance settings in the fresh svn
version of digikam, and I have a question related to this:

After converting a raw to an adjustable image, I am trying to set the white
balance of the picture. Lets say, I set it to 6500K. Calculation done, the
picture is almost perfect. However it needs a slight adjustment with the white
balance. If I re-invoke the white balance settings I will find that it says:
Temperature: 4750.
However, I know it is 6500!

I suppose this is not a bug. I guess digikam doesn't know the color temperature
of a picture by itself. It needs this information either from the camera or from
the user, which is normal. But I think digikam does not get this information
from the camera, or - after setting it to a value - it does not store it
somewhere in a database.

Am I right?

Thanks!

Regards,
Gabor Dudas
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users

[Gilles Caulier-2]

Le Lundi 03 Avril 2006 12:07 AM, Dudas Gabor a écrit :

> Hi,
>
> I am playing with raw conversion and white balance settings in the fresh
> svn version of digikam, and I have a question related to this:
>
> After converting a raw to an adjustable image, I am trying to set the white
> balance of the picture. Lets say, I set it to 6500K. Calculation done, the
> picture is almost perfect. However it needs a slight adjustment with the
> white balance. If I re-invoke the white balance settings I will find that
> it says: Temperature: 4750.
> However, I know it is 6500!
>
> I suppose this is not a bug. I guess digikam doesn't know the color
> temperature of a picture by itself. It needs this information either from
> the camera or from the user, which is normal. But I think digikam does not
> get this information from the camera, or - after setting it to a value - it
> does not store it somewhere in a database.
>
> Am I right?
>

yes nothing is stored somewhere in database about white balance.

About JPEG there is an Exif/makerNote tags about white balance, this is
relevant of 8 bits images.

About RAW, there is a tags but it's can be used actually in digikam directly.

Gilles

> Thanks!
>
> Regards,
> Gabor Dudas
_______________________________________________
Digikam-users mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-users