4 # forked from http://code.sotun.de/git/anondcim/
6 # copyright 2012-2014 Jan Huwald, Felix Kästner (fpunktk)
8 # This program is free software: you can redistribute it and/or modify
9 # it under the terms of the GNU General Public License as published by
10 # the Free Software Foundation, either version 3 of the License, or
11 # (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
31 # random number between 0 and $1 - 1
32 # read from urandom, sh interpretes numbers with leading 0 wrong, so prepend $1 which doesn't change the result
33 echo $(( $1$(tr -dc "0-9" < /dev/urandom | head -c $((${#1} + 2))) % $1 ))
36 type convert >/dev/null 2>&1 || die "ImageMagick (convert, identify) is not installed"
37 type jhead 1>/dev/null 2>&1 || type exiftool 1>/dev/null 2>&1 || die "jhead or exiftool has to be installed"
45 [ $# -gt 0 ] || die "Usage: $0 [-p image_file_prefix] [-s destination_size (absolute or percentage, default: $dst_size)] [-d destination_directory] [-q destination_jpg_quality (default: $jpg_quality)] imagefile(s)"
47 while getopts ':p:s:d:q:' OPTION
51 file_prefix="${OPTARG}_"
57 dst_dir="${OPTARG%/}/" # enforce a trailing "/"
58 [ -d "$dst_dir" ] || die "destination directory \"$dst_dir\" does not exist"
64 err "not recognised: OPTION=$OPTION, OPTARG=$OPTARG"
68 shift $(($OPTIND - 1))
76 [ -f "$fn" ] || { err "source \"$fn\" does not exist and is skipped"; continue; }
78 if [ "$dst_dir" = "--same--" ]
80 # use the directory of the source file
81 dst="$(dirname "$fn")/"
86 # always use a padded number as destination filename suffix
87 dst_jpg="$dst$file_prefix$(echo -n "0000000000$cur" | tail -c ${#total}).jpg"
88 while [ -e "$dst_jpg" ] && [ $addend -lt 1000 ]
90 dst_jpg="$dst$file_prefix$(echo -n "0000000000$(($cur + $addend))" | tail -c ${#total}).jpg"
91 addend=$((addend + 1))
93 [ -e "$dst_jpg" ] && { err "destination \"$dst_jpg\" for source \"$fn\" already exists, anonymization is skipped"; continue; }
95 echo "anonymizing \"$fn\" to \"$dst_jpg\" ($cur/$total)"
98 $(identify -format '%w %h' "$fn")
102 if [ $w -ge 100 ] && [ $h -ge 100 ]
104 if [ $w -ge 1000 ]; then dw=$(($w / 100)); else dw=10; fi
105 if [ $h -ge 1000 ]; then dh=$(($h / 100)); else dh=10; fi
112 -distort Perspective "$(rand $dw) $(rand $dh) 0 0, $(($w - $(rand $dw))) $(rand $dh) $w 0, $(rand $dw) $(($h - $(rand $dh))) 0 $h, $(($w - $(rand $dw))) $(($h - $(rand $dh))) $w $h" \
113 -filter gaussian -define filter:support=5 -define filter:sigma=0.5 \
114 -attenuate 2 +noise Uniform \
115 -resize "$dst_size" \
117 -quality "$jpg_quality" \
120 err "image is too small to be distorted and will just be filtered and resized"
123 -filter gaussian -define filter:support=5 -define filter:sigma=0.5 \
124 -attenuate 2 +noise Uniform \
125 -resize "$dst_size" \
127 -quality "$jpg_quality" \
132 if [ -x "$(which jhead)" ]
134 jhead -purejpg -q "$dst_jpg" || err "removing meta-data with jhead failed"
136 if [ -x "$(which exiftool)" ]
138 exiftool -quiet -overwrite_original -all= "$dst_jpg" || err "removing meta-data with exiftool failed"