[Digikam-devel] [Bug 146714] IE, showfoto, album view rotation: rotated TIFs are losing metadata about picture

[Gilles Caulier]

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http://bugs.kde.org/show_bug.cgi?id=146714         
caulier.gilles gmail com changed:

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------- Additional Comments From caulier.gilles gmail com  2007-06-12 23:09 -------
Mik,

I know this problem with tiff and Exif.

This relevant of 2 issues :

1/ libtiff : this library is used to create/read tiff file. This library do not support Exif metadata (but XMP and IPTC yes). libtiff is used by JPEGLossLess kipi-plugin to perform rotation on non-jpeg files (via ImageMagick), and by image editor to save tiff file. There is an alternative to libtiff : opentiff library, but the license is not fully opensource if i remember...


2/ Exiv2 : this library is used by digiKam to handle all metadata. It do not support yet tiff file format in writting mode. This job is under developpement (Andreas work on it). I hope that it will available for future version of Exiv2.

Note TIFF file based include major RAW files format, like DNG, NEF, CR2, etc... witch will be normally available on writting mode in the future using Exiv2

Andreas, can you give us some fresh info about tiff writting mode support in Exiv2 ? Thanks in advance...

Gilles