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NAME

       jpegexiforient - reads or writes the Exif Orientation Tag

SYNOPSIS

       jpegexiforient [switches] jpegfile

DESCRIPTION

       This  is a utility program to get and set the Exif Orientation Tag.  It
       can be used together with jpegtran in scripts for automatic orientation
       correction of digital camera pictures.

       The Exif orientation value gives the orientation of the camera relative
       to the scene when the image was captured.  The  relation  of  the  ’0th
       row’ and ’0th column’ to visual position is shown as below.

              Value | 0th Row     | 0th Column
              ------+-------------+-----------
                1   | top         | left side
                2   | top         | rigth side
                3   | bottom      | rigth side
                4   | bottom      | left side
                5   | left side   | top
                6   | right side  | top
                7   | right side  | bottom
                8   | left side   | bottom

       For  convenience,  here is what the letter F would look like if it were
       tagged  correctly  and  displayed  by  a  program  that   ignores   the
       orientation tag:

                1        2       3      4

              888888  888888      88  88
              88          88      88  88
              8888      8888    8888  8888
              88          88      88  88
              88          88  888888  888888

                  5            6           7          8

              8888888888  88                  88  8888888888
              88  88      88  88          88  88      88  88
              88          8888888888  8888888888          88

       jpegexiforient  output  the  Exif  Orientation Tag in a JPEG Exif file.
       With the options -1 .. -8, it can also be used to set the tag.

   OPTIONS
       --help display this help and exit

       --version
              output version information and exit

       -n     Do not output the trailing newline

       -1 .. -8
              Set orientation value 1 .. 8

AUTHOR

        Guido Vollbeding <guido@jpegclub.org>

SEE ALSO

       jpegtran(1) exifautotran(1)