[Bug 142564] New: digiKam-signature in iptc and exif tags

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http://bugs.kde.org/show_bug.cgi?id=142564         
           Summary: digiKam-signature in iptc and exif tags
           Product: digikam
           Version: unspecified
          Platform: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: Metadata
        AssignedTo: digikam-devel kde org
        ReportedBy: cmaessen casco demon nl


Version:           0.9.1 (using KDE 3.5.6 "release 31.2" , openSUSE )
Compiler:          Target: i586-suse-linux
OS:                Linux (i686) release 2.6.18.2-34-default

I recently noticed that digiKam edits the tags Exif.Image.Software,
Iptc.Application2.Program and Iptc.Application2.ProgramVersion by
placing its signature in it. In doing so it is replacing information
that was originally put there by the camera or by myself.
I think this is not the correct way to go. Especially in the case of the
exif-tag where the camera's firmware version is overwritten. As the
standard states for the exif-tag; "This tag records the name and
version of the software or firmware of the camera or image input device
used to generate the image."
In the case of the IPTC-tags, which are meant to "identify the program
and programversion used to originate the object data", my personal
information is overwritten.

I would appreciate if this behavior is corrected, or made optional by
implementing a configuration-setting.

Caspar.
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------- Additional Comments From mikmach wp pl  2007-03-06 22:27 -------
Agree - Digikam shouldn't overwrite device tag but IMO it is acceptable to enter info about D. when tags where empty. Even if it doesn't follow to the letter specification - D. isn't "camera or image input device". For exif tag it could even not be configurable.

IMO for IPTC tags it should be configurable.
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[Gilles Caulier-4]

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http://bugs.kde.org/show_bug.cgi?id=142564         
caulier.gilles gmail com changed:

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



------- Additional Comments From caulier.gilles gmail com  2007-03-11 11:29 -------
SVN commit 641435 by cgilles:

libkexiv2 from trunk : set the Exif.Image.Software tag only if it doesn't exist.
BUG: 142564


 M  +16 -4     kexiv2.cpp  


--- trunk/extragear/libs/libkexiv2/kexiv2.cpp #641434:641435
 @ -450,10 +450,22  @
 {
     try
     {
-        QString software(program);
-        software.append("-");
-        software.append(version);
-        d->exifMetadata["Exif.Image.Software"]              = software.ascii();
+        // Check if Exif.Image.Software already exist. If yes, do not touch this tag.
+            
+        if (!d->exifMetadata.empty())
+ {
+            Exiv2::ExifData exifData(d->exifMetadata);
+            Exiv2::ExifKey key("Exif.Image.Software");
+            Exiv2::ExifData::iterator it = exifData.findKey(key);
+      
+            if (it == exifData.end())
+    {
+                QString software(program);
+                software.append("-");
+                software.append(version);
+                d->exifMetadata["Exif.Image.Software"]      = software.ascii();
+    }
+ }
 
         d->iptcMetadata["Iptc.Application2.Program"]        = program.ascii();
         d->iptcMetadata["Iptc.Application2.ProgramVersion"] = version.ascii();
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