Bug 274318

Summary: Add keyboard shortcut for Exif orientation information to operate relative (not absolute) rotation.
Product: [Applications] digikam Reporter: Tex <Tex2571>
Component: Usability-KeyboardAssignee: Digikam Developers <digikam-bugs-null>
Status: REPORTED ---    
Severity: wishlist CC: caulier.gilles
Priority: NOR    
Version: 1.9.0   
Target Milestone: ---   
Platform: Unlisted Binaries   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Tex 2011-05-28 01:49:45 UTC 
Version:           1.9.0 (using KDE 4.6.2) 
OS:                Linux

Exif orientation shortcuts are difficult to find and are absolute only.
It would be great to have something like cntrl-shift left that effectively rotates the image 90 degress left of whatever it is now, by modifying the exif orientation tag.  

Presently absolute manipulations are possible.  In other words one sets the orientation to "rotated left" regardless of how it was already set. What I mean is if it is already set to "rotated left" then the left rotation action should set instead it to "rotated 180".

One option for this might be to have a configuration setting that lets the usual rotation keys act on just the orientation metadata instead of the image.  This behavior, separately from the existing absolute options, could then work in a relative way.

A couple of related points
1)The orientation shortcuts in the shortcut editor are completely not obvious.  One for instance one is just called "normal", The others are like "rotated left". It is not at all clear that these are exif orientation modifications, and for "normal" it's not even clear that's related to rotations at all.

2)"rotated left" actually means the camera was rotated left so the stored picture is in fact rotated right and the outcome after setting the tag, when interpreted by a viewer will be to rotate the picture to the left.  I'm not sure there's a good way to solve that confusion though. 

I would think calling the shortcut "exif rotate left" (not rotated) would help solve both confusions and would put "exif rotate normal" near "exif rotate left" in the shortcut list.



Reproducible: Didn't try
Comment 1 caulier.gilles 2011-06-20 18:05:38 UTC 
Do you know that JPEGLossLess plugin rotate image accordingly to 90° Left or Right (keyborad shortcuts : CTRL+SHIFT+Left/Right)

Gilles Caulier
Comment 2 Tex 2011-10-21 04:09:04 UTC 
Yes; thank you for the reply.  I know of them and mentioned them as an example in the original bug report.  

I have my reasons for liking to use the exif orientation method, partially related to my own custom duplicate fingerprinting/detection methods/needs (you can probably sort of connect the dots there and yes I'm aware of digikam's duplicate detection).  If nobody needed exif re-orientation, it shouldn't be there.  I'm just asking for it to be more user-friendly. It's definitely a wish-list item, not a bug.  But it's a valid wish.
Comment 3 Tex 2012-09-24 13:19:05 UTC 
instead of changing to major it keeps changing to wish list.  A bug is not a wishlist though... trying to change it back to normal at least.
Comment 4 Tex 2012-09-24 13:20:32 UTC 
sorry last post was for wrong bug... not sure how I ended up editing this one.
Comment 5 caulier.gilles 2023-05-13 13:15:16 UTC 
This entry is for the menu to fix Exif tags about orientation, not to rotate the item physically.

Gilles Caulier