David Gerard wrote:
On 10/09/07, Florian Straub Flominator@gmx.net wrote:
Platonides Platonides@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 .