Section: User Commands (1)
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- output the properties contained in a JPEG Exif section
or, by default, its standard input, looking for a JPEG APP1 section
containing Exif (Exchangeable Image File) data. The properties contained in
these data are then printed to the standard output.
Digital cameras typically add Exif data to the image files they produce,
containing information about the camera and digitized image. The options
described below may be used to control output verbosity and section
Output camera-specific, image-specific, and verbose properties contained in
Output camera-specific properties contained in the file.
Output Exif parse debug information.
Output image-specific properties contained in the file.
Make lens characteristics image-specific. Useful for higher-end cameras
that have removable lenses (i.e., not "point-and-shoot" cameras).
Suppress output of a property section header.
Separate field name and value with the string
The default is ': '.
Output unknown or unsupported properties contained in the file. Also,
output invalid properties when debugging information is requested.
Output verbose properties contained in the file.
Some camera manufacturers include a "maker note" section with additional
information about the camera or image not part of the Exif standard.
The format of these maker notes varies wildly and manufacturers are not
forthcoming with implementation details. Therefore,
maker note support is the result of experimentation and reverse engineering
(see below for credits) and incomplete.
is known to have at least partial support for the following manufacturers'
If you wish support for additional
manufacturers or cameras, please send any information you have
about the data format or, better yet, patches, and a sample image file
to the author. (Though he makes no promises.)
utility exits 0 on success, and >0 if an error occurs.
utility was developed using the 2003 draft Exif standard, version 2.21
(http://tsc.jeita.or.jp/) and the June 1992 TIFF specification, revision 6.0
Not all Exif 2.21 properties are supported, due either to the author's laziness
or incomplete information. Maker note support is spotty due to lack of
utility and this man page were written by Eric M. Johnston <email@example.com>.
Portions of the utility were developed while referencing the public domain
Jhead utility, version 1.2, by Matthias Wandel <firstname.lastname@example.org>.
Some maker note support is the result of TsuruZoh Tachibanaya's
and its contributers. Minolta maker note support was contributed by
Javier Crespo <email@example.com>. Panasonic maker note support was
contributed by Tom Hughes <firstname.lastname@example.org>.
Special thanks to the following folks for submitting sample camera files:
Bradley Bailey, Kirk Bauer, Marcy Brown, Frank Fortunato, Per Kristian Hove,
Brian Jackson, Stan Jirman, Kaye Kirsch, Meder Kydyraliev, Kevin Layer,
Henrik Levkowetz, Jamie Mayberry, Jason Montojo, Nick Reid, Frank Reiff,
Christian Schmid, Michael Shostak, Nathan Treadway, Mathieu Vanasse,
Mark Westling, Phillip Wherry, and Christian Zuckschwerdt.
- MAKER NOTES
- SEE ALSO
linux.jgfs.net manual pages