#! /bin/bash

# Shell script to resize JPG files
# Gowtham, 26 July 2004
# 

# This makes a list of all JPEG files
# Modify the extension to pick other type of images
export JPEG_LIST=`find . -iname "*.jpg" | sort`

# ImageMagick's convert utility
export CONVERT="/usr/bin/convert"

# Width of resized images
# Modify the value to meet requirements and make sure
# that the original images are larger than this size.
export WIDTH="640"

# If the directory called 'resized' does not exist,
# resize the images and put them in that folder.
# If such a folder already exists, then quit without
# resizing images.
if [ ! -d ./resized ]
then
  mkdir ./resized

  for x in $JPEG_LIST
  do
    echo "Working on $x"
    $CONVERT $x -sample $WIDTH resized/$x
  done

  echo

else 
  echo "A directory called 'resized' already exists"
  echo "Check its contents, rename it if need be and"
  echo "run this script later."
  echo
  exit
fi