[Digikam-devel] [Bug 196228] New: EXIF Information reported as Unavailable

[Paul Waldo]

https://bugs.kde.org/show_bug.cgi?id=196228

           Summary: EXIF Information reported as Unavailable
           Product: digikam
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel at kde.org
        ReportedBy: paul at waldoware.com


Version:            (using KDE 4.2.1)
OS:                Linux
Installed from:    Ubuntu Packages

Some EXIF parameters are shown as "Unavailable" for images from my Canon
Digital Rebel, e.g. Mode/Program, Flash, White Balance.  

I'm guessing that the problem is that these parameters are in non-standard
locations in the metadata.  For example, the information mentioned above is
stored in the Canon MakerNotes (CanonCs and CanonSi).

I know that trying standardize a non-standard is difficult, so I have a
solution that is a wish.  Even if the above information was displayed properly,
I would like to be able to see additional information on thumbnails and tool
tips.  Lens Type, Metering Mode, ISO Speed, etc. would be nice to see. 
Additionally, this EXIF data cannot be searched upon since it is non-standard. 
For example, if I want to search on Metering Mode, "Any" is the only choice
that will yield hits, presumably because Digikam does not know where to look
for this information.

Apparently Digikam has a "dictionary" of image properties it would like to know
about, such as Mode/Program, Flash, White Balance.  At a bare minimum, there
should be some way to map these things that Digikam wants to arbitrary fields
in the metadata.  So when Digikam wants to display White Balance, it does not
look for "WhiteBalance" in the EXIF part of the metadata, it consults its
lookup table and finds that the value for its concept of White Balance can be
found at MakerNote/CanonSi/WhiteBalance.

A broader wish is to make any metadata available for Digikam to use.  Maybe the
user specifies a display tag, like "Subject Distance", specifies where this
value can be found, like "MakerNote/CanonSi/Subject Distance", and a data type,
like Integer.

Thanks for your consideration!

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