David Gerard wrote:
On 10/09/07, Florian Straub <Flominator(a)gmx.net>
wrote:
Platonides <Platonides(a)gmail.com> wrote on
Sat, 08 Sep 2007 22:23:45 +0200:
> Imagemagick doesn't do lossless
rotation.
>
what does?
jpegtran, which is part of the standard JPEG software.
What does under Windows?
jpegtran for Win32, of course!
http://sylvana.net/jpegcrop/jpegtran/
http://sourceforge.net/projects/gnuwin32 (JPEG package)
there is also a program call jpegcrop from the jpegtran guys that among
other things can do lossless rotation and do it visually.
note however that not all jpegs can be losslessly rotated. The top and
left sides of a jpeg must be on a block boundry and for lossless
rotation the block boundries must not change and .