[Bug 199461] New: picture quickinfo doesn't show isospeed

https://bugs.kde.org/show_bug.cgi?id=199461

           Summary: picture quickinfo doesn't show isospeed
           Product: digikam
           Version: 0.10.0
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           0.10.0 (using 4.2.4 (KDE 4.2.4), Kubuntu packages)
Compiler:          cc
OS:                Linux (i686) release 2.6.28-13-generic

The quickinfo doesn't show the isospeed from my Nikon D50 files. Not the *.nef
or *.jpg.
Please let me know, if you need original files.

I attached a screenshot. There can you see, that the information in the file is
exist.

Thanks

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--- Comment #1 from Ulf Dietrich <ulger gmx de>  2009-07-08 19:45:41 ---
Created an attachment (id=35164)
 --> (http://bugs.kde.org/attachment.cgi?id=35164)
Screenshot from no quickinfo from isospeed

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=199461


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|general                     |Metadata




--- Comment #2 from Gilles Caulier <caulier gilles gmail com>  2009-07-08 19:52:38 ---
You look ISO value from nikon makernotes. this is not standard Exif value.

The value given in tooltip is taken from standard Exif...

Question : why Nikon makernotes value exist ? Which one is the good value.

In all case : Exif values is standardized. This is the reference value which
will use for that. Are you sure that Nikon values is right. Perhaps it's a
decoding problem with Exiv2 and Nikon makernotes parser (Markernote are not
documented, not standardized, and use a private format).

Try to use Exiftool to compare this value with Exiv2. Look which one is right.

Gilles Caulier

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--- Comment #3 from Ulf Dietrich <ulger gmx de>  2009-07-08 20:42:04 ---
Thanks for that fast answer, but i can not find any information to the isospeed
in the digikam EXIF part.

Where is the place where i have to look to give you the information that you
need?

In my part i can say, that the nikon part is right. It shows the information to
the isospeed like the time i take the pictures.

Ulf

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--- Comment #4 from Mikolaj Machowski <mikmach wp pl>  2009-07-08 21:29:55 ---
Nikon plays dirty with users by removing some vital info from official
standards and using them only in proprietary Makernotes This caused some
brouhaha few years ago when they started this practice.

Now this is question what digiKam should do? It shows this value but in another
place, basic functionality is provided.

Make some workaround `if ( maker == "NIKON" ) { Exif-ISO = NIKON-ISO }` ?

How far should that go - apply only to interface (tooltips, properties panel)
or "fix" this by filling proper Exif ISO field?

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Andreas Huggel <[hidden email]> changed:

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--- Comment #5 from Andreas Huggel <ahuggel gmx net>  2009-07-09 02:45:31 ---
There is Exiv2 functionality to help with such cases, introduced in 0.18.1. ISO
Speed is only one example for this mess. Have a look at the links below and it
will be quite clear.

http://www.exiv2.org/doc/easyaccess_8hpp.html
http://dev.exiv2.org/repositories/entry/exiv2/trunk/src/easyaccess.cpp?rev=1760

Andreas

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--- Comment #6 from Gilles Caulier <caulier gilles gmail com>  2009-07-09 08:17:08 ---
Thanks Andreas,

I have already some wrappers like this in digiKam and libkexiv2. For exemple,
About ISO speed :

http://lxr.kde.org/source/extragear/graphics/digikam/libs/dmetadata/dmetadata.cpp#511

...where makernotes are not yet parsed as in Exiv2 :

http://dev.exiv2.org/repositories/entry/exiv2/trunk/src/easyaccess.cpp?rev=1760#L78

Mik, a patch is very easy to do...

Gilles

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--- Comment #7 from Gilles Caulier <caulier gilles gmail com>  2009-07-20 13:15:50 ---
Marcel,

I can see redondant code everywhere in DMetadata. For ex. :

http://lxr.kde.org/source/extragear/graphics/digikam/libs/dmetadata/dmetadata.cpp#541

http://lxr.kde.org/source/extragear/graphics/digikam/libs/dmetadata/dmetadata.cpp#1162

We need really to factorize code...

Gilles

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED




--- Comment #8 from Gilles Caulier <caulier gilles gmail com>  2011-12-16 16:08:14 ---
Git commit f8e878cbc287741f8e7aee3e345ab49d057ba613 by Gilles Caulier.
Committed on 16/12/2011 at 17:07.
Pushed by cgilles into branch 'master'.

new wrapper to extract ISO speed info from more tags, especially makernotes
BUGS: 199461

M  +65   -21   libs/dmetadata/dmetadata.cpp
M  +4    -1    libs/dmetadata/dmetadata.h

http://commits.kde.org/digikam/f8e878cbc287741f8e7aee3e345ab49d057ba613

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Version Fixed In|                            |2.5.0

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