[Digikam-users] Rotatation method based on EXIF

[Dudas Gabor]

Gilles Caulier wrote:
> On Wednesday 07 June 2006 04:45 pm, Dudas Gabor wrote:
>> Gilles Caulier wrote:
>>> On Wednesday 07 June 2006 04:17 pm, Dudas Gabor wrote:
>>>> Hello,
>>>>
>>>> I would like to know which version is correct from below:
>>>>
>>>> 1:
>>>>   When I download a vertically oriented picture with digiKam, it will
>>>> rotate _physically_ the picture according to the EXIF tag, and then it
>>>> sets the EXIF tag back to the "normal" value
>>>>
>>>> 2:
>>>>   When I download a vertically oriented picture with digiKam, it will
>>>> _not_ rotate the picture, it will only display it according to the EXIF
>>>> note
>>> 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?
> 
> Autoraotation are implemented in both version. 0.9.0-svn is more advanced.
> 
>> As I see in the Configuration/Embedded Info panel I have to select the
>> "Rotate images and thumbnails according to EXIF tag" 
> 
> This option perform a rotation of render in the screen. Nothing is changed 
> into image.
> 
>> and the "Set EXIF 
>> orientation tag to normal after rotate/flip" options to have a physically
>> rotated picture. Please confirm...
> 
> Set orientation tag to normal when the image is saved using editor.
> 
>> About the rotation: Is it done in a "losless" way? Or with recompression?
> 
> cameragui autorotation is lossless. The same about kipi plugin JPEGLossLess 
> (witch give Image/Rotate menu option in main interface) 
> 
>> 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.
> 
> It's done like this. You have an option to perform this transformation in the 
> cameragui during picture downloading.
> 
> Gilles
> 
> 


Perfect!
Thanks for the fast reply!

Regards,
Gabor