[Digikam-users] Is jpeg rotation loseless?

[Gilles Caulier]

Le Samedi 10 Juin 2006 18:04, Florian Lindner a écrit :
> 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?
>

By a kipi plugin.

Gilles