Bug 128309 - editing Exif rotation info
Summary: editing Exif rotation info
Status: RESOLVED NOT A BUG
Alias: None
Product: digikam
Classification: Applications
Component: Metadata-Orientation (show other bugs)
Version: unspecified
Platform: Gentoo Packages Linux
: NOR normal
Target Milestone: ---
Assignee: Digikam Developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-05-30 11:57 UTC by Francesco D'Offizi
Modified: 2022-01-19 10:56 UTC (History)
0 users

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Latest Commit:
Version Fixed In: 7.6.0

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Description Francesco D'Offizi 2006-05-30 11:57:35 UTC 
Version:            (using KDE KDE 3.5.2)
Installed from:    Gentoo Packages

I think it could be useful to be able to rotate images by hand using exif instead of opening jpeg, rotating it and saving it again (recompressing it!).
I don't know if it's there but I can't find an Exif rotate 90° option.
Comment 1 Francesco D'Offizi 2006-05-30 12:09:04 UTC 
Well I found the option in digikam image menu. Well it should be even on right click on image menu don't you think? And even in Editor menu... this way is too slow to edit a lot of pics while viewing them!
Comment 2 caulier.gilles 2006-05-30 12:21:38 UTC 
Hi Francesco,

The main interface Image/Rotate menu entry is generated by a kipi plugin, not digiKam itself.

The option is also available in RMB menu of album items.

http://docs.kde.org/development/en/extragear-graphics/digikam/maininterfaceassigntags.png

There is an option in camera interface to autorotate JPEG file in the same way

This plugin operate in LossLess with JPEG images. Image editor operate using a generic Pixel based mode.

Gilles Caulier
Comment 3 Francesco D'Offizi 2006-05-30 12:36:27 UTC 
Sure that chosing rotate from rmb menu of album items uses the lossless rotation? It's slower than Image menu Exif option as it has to do a lot of work... and even image size isn't the same after rotating this way.
Still valid my suggestion to add it in Editor/Viewer menu...
Comment 4 caulier.gilles 2006-05-30 12:42:41 UTC 
Yes, i'm sure. I maintain the JPEGLossLess kipi plugin. From Main interface :

'Rotate' perform loosless 90°/180°/270° rotation
'Flip' perform loosless horizontally/vertically flipping
'Correct Exif orientation tag...' only change the Exif tag and don't touch the image.

Gilles Caulier
Comment 5 Francesco D'Offizi 2006-05-30 12:56:08 UTC 
Ok so I'd like to see Correct Exif orientation tag... on right click on image, and in editor view... Maybe I'm blind but I can't see it! :P
Comment 6 caulier.gilles 2006-05-30 13:02:59 UTC 
Kipi plugins are for main interface not image editor.

In current implementation (0.9.0), editor fix/update automaticly :

- exif orientation tag when you save your picture
- exif image dimensions.
- exif/iptc descriptions text informations (photograph, copyright, etc.)
- exif thumbnail 

Because 0.9.0 depand of Exiv2 library. This is cannot be done in 0.8.x serie (old and obsolete libexif library)
!
Gilles caulier