[UPHPU] Lossless jpg operations

[Gary Thornock]

--- On Fri, 6/5/09, Brandon Stout <bms at mscis.org> wrote:
> Is there a simple Linux tool that lets me losslessly rotate a
> camera image, and change the exif 'orientation' tag - hopefully
> at once?

jhead can rotate images losslessly (I believe it uses jpegtran to
do this), based on EXIF data.

http://www.sentex.net/~mwandel/jhead/

Alternatively, someone posted a shell script to rotate images
losslessly with jpegtran based on EXIF data, at:

http://www.velocityreviews.com/forums/t244613-imagemagick-and-lossless-jpeg-rotation.html