[Kde-imaging] [Bug 144604] Rotation causes Exif data corruption

[Gerhard Kulzer]

Am Thursday 26 April 2007 schrieb Andreas Huggel:
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> http://bugs.kde.org/show_bug.cgi?id=144604
>
>
>
>
> ------- Additional Comments From ahuggel gmx net  2007-04-26 13:26 -------
> Gilles,
>
> Exiv2 typedef unsignedLong is correct for Exif type LONG.
>
> There is a misunderstanding here. The Exif standard uses a terminology
> which is different from C++:
>
> Types as defined in the Exif standard (page 14)
> Value  Name    Desc
> 4      LONG    A 32 bit unsigned integer
> 9      SLONG   A 32 bit signed integer
>
> Exiv2 uses typedefs unsignedLong and signedLong and names "Long" and
> "SLong" respectively.
>
> Can you please point me to the libkexiv2 code I should look at?
>
> Have you tried to reproduce the problem in digiKam on your computer? If you
> can, can you also reproduce the problem with the exiv2 tool alone, just by
> running the same commands using the modify action?
>
>
> Gerhard,
>
> I suggest you report this as a separate issue, once you have more
> information and it still looks like digiKam/exiv2 is not doing the right
> thing. The question here is whether the GPS tags in those images conform to
> the Exif standard. For a start, use exiv2 -pt and exiv2 -pv to check.

Digikam JPG exiv2 -pt
Exif.GPSInfo.GPSVersionID                    Byte        4  2 0 0 0
Exif.GPSInfo.GPSLatitudeRef                  Ascii       2  North
Exif.GPSInfo.GPSLatitude                     SRational   3  63deg 59.35280'
Exif.GPSInfo.GPSLongitudeRef                 Ascii       2  West
Exif.GPSInfo.GPSLongitude                    SRational   3  22deg 35.68542'
Exif.GPSInfo.GPSAltitudeRef                  Byte        1  Above sea level
Exif.GPSInfo.GPSAltitude                     SRational   1  37.6 m
Exif.GPSInfo.GPSMapDatum                     Ascii       7  WGS-84

exiv2 -pv
0x0000 GPSInfo      GPSVersionID                Byte        4  2 2 0 0
0x0001 GPSInfo      GPSLatitudeRef              Ascii       2  N
0x0002 GPSInfo      GPSLatitude                 Rational    3  29/1 29/1 
2314/100
0x0003 GPSInfo      GPSLongitudeRef             Ascii       2  W
0x0004 GPSInfo      GPSLongitude                Rational    3  89/1 42/1 
723/100
0x0005 GPSInfo      GPSAltitudeRef              Byte        1  0
0x0006 GPSInfo      GPSAltitude                 Rational    1  4294967273/1
0x0007 GPSInfo      GPSTimeStamp                Rational    3  14/1 4/1 31/1

Other source JPG exiv2 -pt (this one works with Gallery 2.2)
Exif.GPSInfo.GPSVersionID                    Byte        4  2 2 0 0
Exif.GPSInfo.GPSLatitudeRef                  Ascii       2  North
Exif.GPSInfo.GPSLatitude                     Rational    3  29deg 29' 23.140"
Exif.GPSInfo.GPSLongitudeRef                 Ascii       2  West
Exif.GPSInfo.GPSLongitude                    Rational    3  89deg 42' 7.230"
Exif.GPSInfo.GPSAltitudeRef                  Byte        1  Above sea level
Exif.GPSInfo.GPSAltitude                     Rational    1  4294967296 m
Exif.GPSInfo.GPSTimeStamp                    Rational    3  14:04:31

exiv2 -pv
0x0000 GPSInfo      GPSVersionID                Byte        4  2 0 0 0
0x0001 GPSInfo      GPSLatitudeRef              Ascii       2  N
0x0002 GPSInfo      GPSLatitude                 SRational   3  63/1 
59352804/1000000 0/1
0x0003 GPSInfo      GPSLongitudeRef             Ascii       2  W
0x0004 GPSInfo      GPSLongitude                SRational   3  22/1 
35685424/1000000 0/1
0x0005 GPSInfo      GPSAltitudeRef              Byte        1  0
0x0006 GPSInfo      GPSAltitude                 SRational   1  376285/10000
0x0012 GPSInfo      GPSMapDatum                 Ascii       7  WGS-84

This is my first diagnostics.
Gerhard

> -ahu.
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-- 
Hakuna matata
http://www.gerhard.fr
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