hflip.sh

#!/bin/bash

# Implementation of a tool used to horizontally flip images (and save them as
# new images in a new folder '<dir_name>/flipped/').
#
# Usage: bash hflip.sh <dir_name>

#############
# Variables #
#############

if [ $# -lt 1 ]; then
    echo "Usage: bash hflip.sh <dir_name>"

    exit
fi

# Name of the directory to apply flip
DIR=$1


########
# Main #
########

count=0

mkdir -p ${DIR}flipped

for f in ${DIR}*.png; do
    base=$(basename -- "$f")
    base="${base%.*}"

    convert -flop $f ${DIR}flipped/flipped_${base}_$count.png

    count=$((count + 1))
done