[Digikam-users] Is jpeg rotation loseless?

[Florian Lindner]

Am Samstag, 10. Juni 2006 16:23 schrieb Dudas Gabor:
> Florian Lindner wrote:
> > Hello,
> > is the jpeg rotation in digikam loseless or not?
> >
> > Thanks,
> >
> > Florian
> > _______________________________________________
> > Digikam-users mailing list
> > Digikam-users at kde.org
> > https://mail.kde.org/mailman/listinfo/digikam-users
>
> I can only quote from an email from 2 days ago:
>
> *************
>
>  >>> 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
>  > >
>  > > Sorry, thats of course not true what I wrote here. Corrected version:
>  > > "The image editor is pixel-based and thus lossy if you save back to
>  > > JPEG"
>  > >
>  > > kipiplugin and cameraUI rotation is lossless, but JPEG specific. The
>  > > image editor supports lossless PNG.
>
> And tiff of course.

And how can I tell when I use the image editor rotating feature and when the 
feature from a KIPI plugin? The rotation I can do from a thumbnails context 
menu. Is this done by a plugin or by the image editor?

Thanks,

Florian