:
##########################################################################
# Title : exifinfo - print EXIF information of an image file
# Author : Heiner Steven
# Date : 2004-01-09
# Category : Graphics
# Requires : identify
# SCCS-Id. : @(#) exifinfo 1.4 13/05/01
##########################################################################
# Description
#
# Caveats
# o EXIF tags that would result in invalid shell variable names
# should be rewritten, e.g. by replacing invalid characters with a
# '_' character
# o Individual tag names (e.g. "ImageWidth") should be allowed
#
# Bibiliography
# o exif.org: "Specifications"
# http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
# o TsuruZoh Tachibanaya: "Description of Exif file format",
# http://park2.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html
#
# Output example (identify 5.5.4)
# EXIF_Make='EASTMAN KODAK COMPANY'
# EXIF_Model='KODAK DX4530 ZOOM DIGITAL CAMERA'
# EXIF_Orientation='1'
# EXIF_XResolution='230/1'
# EXIF_YResolution='230/1'
# EXIF_ResolutionUnit='2'
# EXIF_YCbCrPositioning='1'
# EXIF_ExifOffset='506'
# EXIF_ExposureTime='1/30'
# EXIF_FNumber='28/10'
# EXIF_ExposureProgram='2'
# EXIF_ExifVersion='0220'
# EXIF_DateTimeOriginal='2003:01:03 08:41:52'
# EXIF_DateTimeDigitized='2003:01:03 08:41:52'
# EXIF_ComponentsConfiguration='...'
# EXIF_ShutterSpeedValue='50/10'
# EXIF_ApertureValue='3/1'
# EXIF_ExposureBiasValue='0/1000'
# EXIF_MaxApertureValue='30/10'
# EXIF_MeteringMode='5'
# EXIF_LightSource='0'
# EXIF_Flash='25'
# EXIF_FocalLength='80/10'
# EXIF_MakerNote='KDK0002IDX4530 ..'
# EXIF_FlashPixVersion='0100'
# EXIF_ColorSpace='1'
# EXIF_ExifImageWidth='2580'
# EXIF_ExifImageLength='1932'
# EXIF_InteroperabilityOffset='2320'
# EXIF_unknown='R98'
# EXIF_unknown='0100'
# EXIF_ExposureIndex='140/1'
# EXIF_SensingMethod='2'
# EXIF_FileSource='.'
# EXIF_SceneType='.'
# EXIF_unknown='0'
# EXIF_unknown='0'
# EXIF_unknown='0'
# EXIF_unknown='0/100'
# EXIF_unknown='38'
# EXIF_unknown='0'
# EXIF_unknown='1'
# EXIF_unknown='0'
# EXIF_unknown='0'
# EXIF_unknown='0'
# EXIF_unknown='0'
##########################################################################
PN=`basename "$0"` # Program name
VER='1.4'
usage () {
echo >&2 "$PN - print EXIF information of an image file, $VER
usage: $PN [-p prefix] image [image ...]
-p: variable prefix (default is \"EXIF_\")
Prints the EXIF information from the image files. The output is printed
as "var=value" pairs in a way suitable as input to the shell, e.g.
eval \`$PN image.jpg\`
can be used to set variables e.g. \"EXIF_ExifVersion\". Note that EXIF
tags with names that would be invalid shell variable names are silently
ignored."
exit 1
}
msg () {
for MsgLine
do echo "$PN: $MsgLine" >&2
done
}
fatal () { msg "$@"; exit 1; }
Prefix=
while getopts :hp: opt
do
case "$opt" in
p) Prefix=$OPTARG;;
h) usage;;
?) usage;;
esac
done
shift `expr $OPTIND - 1`
[ $# -lt 1 ] && usage
prefix=${Prefix:-EXIF_}
info='*'
for file
do
# Explanation of the "sed" expressions:
# o remove all lines not containing a "="
# o remove "exif:" prefix appearing with e.g. identify(1) 6.7.7
# o remove all lines containing tag names that would form invalid
# shell variable names
# o quote all apostrophy characters ' as '\''
# o add an apostrophy at the front and the end of the value
# string
# o write the variable name prefix in front of each variable
identify -format "%[EXIF:$info]" "$file" |
sed \
-e 's/^exif://g' \
-e '/^[^=]*$/d' \
-e '/[^A-Za-z0-9_=][^=]*=/d' \
-e "s/'/'\\\\''/g" \
-e "s/=/='/" \
-e "s/\$/'/" \
-e "s/^/$prefix/"
done