NAME
exiftags - output the properties contained in a JPEG Exif section
SYNOPSIS
exiftags [ -acdilquv ] [ -s delim ] [ file ... ]
DESCRIPTION
The exiftags utility parses file 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 formatting.
OPTIONS
-a Output camera-specific, image-specific, and verbose properties
contained in the file.
-c Output camera-specific properties contained in the file.
-d Output Exif parse debug information.
-i Output image-specific properties contained in the file.
-l Make lens characteristics image-specific. Useful for higher-end
cameras that have removable lenses (i.e., not "point-and-shoot"
cameras).
-q Suppress output of a property section header.
-s Separate field name and value with the string delim. The
default is ’: ’.
-u Output unknown or unsupported properties contained in the file.
Also, output invalid properties when debugging information is
requested.
-v Output verbose properties contained in the file.
MAKER NOTES
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, exiftags maker note support is the result of experimentation
and reverse engineering (see below for credits) and incomplete.
exiftags is known to have at least partial support for the following
manufacturers’ maker notes:
Asahi/Pentax
Canon
Casio
Fujifilm
Leica
Minolta
Nikon
Olympus
Panasonic
Sanyo
Sigma
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.)
DIAGNOSTICS
The exiftags utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
exifcom(1), exiftime(1)
STANDARDS
The exiftags 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
(http://partners.adobe.com/asn/developer/pdfs/tn/TIFF6.pdf).
BUGS
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 information.
AUTHOR
The exiftags utility and this man page were written by Eric M. Johnston
<emj@postal.net>. Portions of the utility were developed while
referencing the public domain Jhead utility, version 1.2, by Matthias
Wandel <mwandel@rim.net>. Some maker note support is the result of
TsuruZoh Tachibanaya’s compendium
(http://www.ba.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html) and
its contributers. Minolta maker note support was contributed by Javier
Crespo <jcrespoc@dsland.org>. Panasonic maker note support was
contributed by Tom Hughes <tom@compton.nu>.
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.