As far as I'm aware, you wont get lossless jpeg rotation.
There does appear to be an orientation tag of some sort in the jpeg
header, so rewriting that could cause a jpeg to be displayed with a
different orientation. I'm not aware of any software that will do
this however.
All editors that I've seen will re-encode a jpeg whenever any change
is made. Whenever that happens, you'll lose information.
(Actually, lossless jpeg encoding is possible but I've never seen a
publicly available app or library that impliments it.)
paulm
On 8/10/2009, at 10:38 AM, Frank Bax wrote:
I'm looking for basic image editor: crop, resize, lossless jpg
rotation.
Something minimalistic would be nice, so GIMP is out.
