JPEGEXIFORIENT(1)						   User Commands						 JPEGEXIFORIENT(1)

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 orienta-
       tion 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 orienta-
       tion 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)

jpegexiforient							   February 2005						 JPEGEXIFORIENT(1)