(from FreeBSD)
exiftran is a command line utility to transform digital image jpeg
images. It can do lossless rotations like jpegtran, but unlike jpegtran
it cares about the EXIF data: it can rotate images automatically by
checking the exif orientation tag, it updates the exif informaton if
needed (image dimension, orientation), it also rotates the exif
thumbnail. It can process multiple images at once.
requested by jsg@
ok jasper@