Create noisy copies of images

create-noise.sh

#!/bin/sh
usage() 
{
        echo -e "Usage: $0 -c <number of noisy copies per image> -s <source folder containing images> -p <image name pattern> -d <destination folder to keep noisy images>" \
        "\nExample Usage: ./create-noise.sh -c 10 -s /home/satyadeep/Pictures/000 -p '*.jpg' -d /home/satyadeep/temp/tst" 1>&2; exit 1;
}
while getopts c:s:p:d: option
do
        case "${option}"
        in
                c) LOOP_COUNT=${OPTARG};;
                s) SOURCE_FOLDER=${OPTARG};;
                p) PATTERN=${OPTARG};;
                d) DEST_FOLDER=${OPTARG};;
                *) usage;;
        esac
done

echo COUNT=$LOOP_COUNT
echo SOURCE=$SOURCE_FOLDER
echo PATTERN=$PATTERN
echo DEST_FOLDER=$DEST_FOLDER

for BASE_IMG in $SOURCE_FOLDER/$PATTERN
do
        echo $BASE_IMG
        counter=0
        until [ ! $counter -lt $LOOP_COUNT ]
        do
                convert $BASE_IMG +noise Gaussian $DEST_FOLDER/$counter-`basename $BASE_IMG`
                echo "Generated " $DEST_FOLDER/$counter-`basename $BASE_IMG`
                counter=`expr $counter + 1`
        done
done