Initial commit

diff --git a/anonpic.sh b/anonpic.sh
new file mode 100755 (executable)
index 0000000..5684bf1
--- /dev/null
+++ b/anonpic.sh
@@ -0,0 +1,56 @@
+#!/bin/sh -e
+
+function die() { 
+    echo -e "$*" >&2
+    exit 1
+}
+
+function r() {
+    echo $(($RANDOM % $1))
+}
+
+max=$#
+cur=1
+
+[ $max -gt 0 ] || die "Usage:\n[IMG_PREFIX=your_prefix] $0 img1.jpg img2.jpg ..."
+[ -x "$(which convert)" ] || die "ImageMagick is not installed"
+[ -x "$(which jhead)" ] || die "jhead is not installed"
+
+while [ $# -gt 0 ]; do
+    dst="$IMG_PREFIX$(seq -w $cur $max|head -n1).jpg"
+    echo -e "[$((100*cur/max))%]\t$1\t-> $dst"
+
+    [ -f "$1" ] || die "$1 does not exist"
+    (! [ -e "$dst" ]) || die "$dst already exists"
+
+    read W H <<EOF
+        $(identify $1 |cut -f3 -d\ |tr x \ )
+EOF
+
+    [ $W -ge 100 ] && [ $H -ge 100 ] || die "image is too small"
+    
+    if [ $W -ge 1000 ]; then DW=$((W / 100)); else DW=10; fi
+    if [ $H -ge 1000 ]; then DH=$((H / 100)); else DH=10; fi
+    
+    W=$(($W-1))
+    H=$(($H-1))
+    
+    convert $1 \
+       -colorspace RGB \
+       -distort Perspective "$(
+        (   echo $(r $DW)           $(r $DH)           0  0
+           echo $(($W - $(r $DW))) $(r $DH)           $W 0
+           echo $(r $DW)           $(($H - $(r $DH))) 0  $H
+           echo $(($W - $(r $DW))) $(($H - $(r $DH))) $W $H
+        ) | tr " \n" ", ")" \
+       -filter gaussian -define filter:support=5 -define filter:sigma=0.5 \
+       -attenuate 2 +noise Uniform \
+       -resize 50% \
+       -colorspace sRGB \
+       "$dst"
+
+    jhead -purejpg -q "$dst" || die "removing meta-data failed"
+
+    cur=$(($cur + 1))
+    shift
+done