[Digikam-devel] [digikam] [Bug 338753] New: Exif ImageDescription field is being used incorrectly

[DrSlony]

https://bugs.kde.org/show_bug.cgi?id=338753

            Bug ID: 338753
           Summary: Exif ImageDescription field is being used incorrectly
           Product: digikam
           Version: 4.2.0
          Platform: Gentoo Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Metadata
          Assignee: digikam-devel at kde.org
          Reporter: bugs at londonlight.org

I had a hard time figuring out where the software chain I used in my workflow
is broken. I traced it down to digiKam using the EXIF:ImageDescription field
for the image description. While this seems perfectly fine, reading the Exif
specification reveals that the unfortunate circumstance is that this field is
actually reserved for the title!

CIPA DC- 008-Translation- 2012
" ImageDescription
A character string giving the title of the image. It is possible to be added a
comment such as "1988
company picnic" or the like. Two-byte character codes cannot be used. When a
2-byte code is
necessary, the Exif Private tag UserComment is to be used.
Tag = 270 (10E.H)
Type = ASCII
Count = Any
Default = None"

One ends up with a long image description where the title should be, and when
you use other software which stick to the spec this causes problems and more
work.

I edited the metadata like this:
http://i.imgur.com/YF5qPP7.png

exiftool -G -s -a -m -u -args apg363.tif | egrep "Description panel|Title
panel"
-EXIF:ImageDescription=Description panel..ASCII   Kolor stitching | 3 pictures
| Size: 599 x 512 | Lens: Fisheye | RMS: 2.23 | FOV: 73.76 x 49.34 ~ 28.90 |
Projection: Planar | Color: None |
-EXIF:UserComment=Description panel..ASCII   Kolor stitching | 3 pictures |
Size: 599 x 512 | Lens: Fisheye | RMS: 2.23 | FOV: 73.76 x 49.34 ~ 28.90 |
Projection: Planar | Color: None |
-XMP:ImageDescription=Description panel..ASCII   Kolor stitching | 3 pictures |
Size: 599 x 512 | Lens: Fisheye | RMS: 2.23 | FOV: 73.76 x 49.34 ~ 28.90 |
Projection: Planar | Color: None |
-XMP:Title=Title panel.
-XMP:Description=Description panel..ASCII   Kolor stitching | 3 pictures |
Size: 599 x 512 | Lens: Fisheye | RMS: 2.23 | FOV: 73.76 x 49.34 ~ 28.90 |
Projection: Planar | Color: None |
-XMP:UserComment=Description panel..ASCII   Kolor stitching | 3 pictures |
Size: 599 x 512 | Lens: Fisheye | RMS: 2.23 | FOV: 73.76 x 49.34 ~ 28.90 |
Projection: Planar | Color: None |
-IPTC:ObjectName=Title panel.
-IPTC:Caption-Abstract=Description panel..ASCII   Kolor stitching | 3 pictures
| Size: 599 x 512 | Lens: Fisheye | RMS: 2.23 | FOV: 73.76 x 49.34 ~ 28.90 |
Projection: Planar | Color: None |

As you can see, according to the spec this is wrong, as EXIF:ImageDescription
should be "Title panel."

Any chance this could be fixed in 4.3.0?

Reproducible: Always

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