[Digikam-users] Rotatation method based on EXIF

Marcel Wiesweg marcel.wiesweg at gmx.de
Wed Jun 7 18:03:15 BST 2006

> > Both 0.8.x and 0.9.0-svn. Just set the right option in cameragui and
> > metadata setup
> >
> > Note : 0.9.0 only will set :
> >
> > - The embedded JPEG thumb using the rotated image.
> > - The image size Exif tags to the right values.
> >
> > Gilles
> Sorry..I don't quite understand...:)
> "Both 0.8.x and 0.9-svn" means both versions are possible?

Both versions support both rotation methods.

> As I see in the Configuration/Embedded Info panel I have to select the
> "Rotate images and thumbnails according to EXIF tag" and the "Set EXIF
> orientation tag to normal after rotate/flip" options to have a physically
> rotated picture. Please confirm...

That's for the image editor. While downloading, look at the advanced options.

> About the rotation: Is it done in a "losless" way? Or with recompression?

The CameraUI is lossless. The image editor is pixel-based and thus lossless if 
you save back to JPEG. For already downloaded images, use the Jpeglossless 
kipi plugin, it's the same method as the CameraUI rotation.

> Actually in my opinion the real rotation of the picture during the
> downloading phase is better (only if it is possible to done without data
> loss), since some of the image programs/viewers are still not dealing with
> the EXIF tag, thus they will open a portrait horizontally.

That's right, but you have the choice.


> Regards,
> Gabor

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