how to rotate image files of GENERIC angles?

[Kaj Haulrich]

On 19.11.2022 15.34, Marco Fioretti wrote:
> Hello all,
> 
> I am scanning lots of A4 sheets with 6/7 small photographs glued on each 
> side. The problem is that most of those photographs, were deliberately 
> NOT glued parallel to the sheet edges, and often each at a different angle
> 
> So to get images that display well on screen I should crop every image, 
> ROTATE it so that the bottom side is "horizontal", and then crop it again.
> 
> The problem is the rotation. I Have searched before posting, but only 
> found tools like jpegtran that only rotate of multiple of 90 degrees.
> 
> What I would need, instead, is any Linux-compatible tool to which I can 
> say "rotate this file N degrees", for every N integer between (at least) 
> 0 and 90.
> 
> Suggestions? CLI or GUI is the same, albeit I'd prefer a command line 
> solution.

Marco, you can use digikam: menu --> Transform  --> Free Rotation.
HTH
Kaj Haulrich.
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