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         | right side
                3   | bottom      | right 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)