diff --git a/.gitignore b/.gitignore
index f418d8d..3d981c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 *~
 \#*
 .\#*
+*.swp
+*.vcf
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e4e6a59
--- /dev/null
+++ b/README.md
@@ -0,0 +1,17 @@
+# VCF Compressor
+
+A simple bash script that compress images inside a vCard 3.0.
+
+
+## Requirements
+
+* bash
+* imagemagick
+
+
+## Further reading
+
+* [vCard on Wikipedia](https://en.wikipedia.org/wiki/VCard)
+* vCard 3.0: [RFC 2425](https://tools.ietf.org/html/rfc2425) and [RFC 2426](https://tools.ietf.org/html/rfc2426)
+* vCard 4.0: [RFC 6350](https://tools.ietf.org/html/rfc6350)
+* CardDAV: [RFC 6352](https://tools.ietf.org/html/rfc6352)
diff --git a/vcf_compressor.sh b/vcf_compressor.sh
index 3ddc164..99ff3ae 100755
--- a/vcf_compressor.sh
+++ b/vcf_compressor.sh
@@ -1,16 +1,16 @@
 #!/bin/bash
 ## Copyright (c) 2015 Rodolphe Breard
-## 
+##
 ## This program is free software: you can redistribute it and/or modify
 ## it under the terms of the GNU General Public License as published by
 ## the Free Software Foundation, either version 3 of the License, or
 ## (at your option) any later version.
-## 
+##
 ## This program is distributed in the hope that it will be useful,
 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ## GNU General Public License for more details.
-## 
+##
 ## You should have received a copy of the GNU General Public License
 ## along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ##
@@ -29,21 +29,46 @@ usage () {
     echo ""
     echo "Options:"
     echo "  -o, --output"
-    echo "  -v, --verbose"
-    echo "  -V, --version"
+    echo "  --version"
     echo "  -h, --help"
     exit "$exit_status"
 }
 
-echo_verbose () {
-    if [ $verbose -gt 0 ]; then
-        echo "$@"
+raw_img () {
+    line="$1"
+
+    echo "$line" | cut -d ":" -f2 | base64 -d
+}
+
+compress_photo () {
+    line="$1"
+    max_width="300"
+    max_height="300"
+
+    prefix=$(echo "$line" | cut -d ":" -f1)
+    width=$(raw_img "$line" | identify -format '%w' -)
+    height=$(raw_img "$line" | identify -format '%h' -)
+    if [ "$width" -gt "$max_width" ] || [ "$height" -gt "$max_height" ] ; then
+        picture=$(raw_img "$line" | convert "-" -quality 50 -resize "${max_width}x${max_height}>" "-" | base64 -w0)
+        echo "$prefix:$picture"
+    else
+        echo "$line"
+    fi
+}
+
+process_line () {
+    line="$1"
+
+    echo "$line" | egrep "^PHOTO;" | grep ";ENCODING=b;" >/dev/null 2>&1
+    if [ $? -eq 0 ]; then
+        compress_photo "$line"
+    else
+        echo "$line"
     fi
 }
 
 input_file=""
 output_file=""
-verbose=0
 
 while :; do
     test $# -gt 0 || break
@@ -57,11 +82,7 @@ while :; do
                 usage
             fi
             ;;
-        -v|--verbose)
-            verbose=1
-            shift
-            ;;
-        -V|--version)
+        --version)
             version
             ;;
         -h|--help)
@@ -79,12 +100,19 @@ while :; do
     esac
 done
 test -z "$input_file" && usage
+if [ ! -f "$input_file" ]; then
+    echo "$input_file: file not found"
+    exit 1
+fi
 if [ -z "$output_file" ]; then
     dir=$(dirname "$input_file")
     name=$(basename "$input_file" ".vcf")
     output_file="$dir/$name.new.vcf"
 fi
 
-echo "in:  $input_file"
-echo "out: $output_file"
-echo_verbose "verbose mode on"
+echo -n > "$output_file"
+
+while IFS='' read -r line || [[ -n "$line" ]]; do
+    line=$(process_line "$line")
+    echo "$line" >> "$output_file"
+done < "$input_file"