A script to scale images using ImageMagick

scaler.sh

#!/usr/bin/env bash

SOURCE_DIRECTORY=$1 # Provide absolute path
TARGET_DIRECTORY=$2 # Provide absolute path

if [ ! -d $SOURCE_DIRECTORY ]
then
    echo "Source directory ${SOURCE_DIRECTORY} does not exist"
    exit 1
fi

if [ ! -d $TARGET_DIRECTORY ]
then
    echo "Target directory ${TARGET_DIRECTORY} does not exist"
    exit 1
fi

cd $SOURCE_DIRECTORY

# Update file extension as needed
for file in $(ls -1 *.JPG)
do
    # Resize to specific dimensions and keep aspect ratio
    # Update dimmentions as needed
    convert -verbose $file -resize 3500x3500 "${TARGET_DIRECTORY}/$file"
done

cd -