dipnlik

#!/bin/bash
shopt -s nullglob # won't error if a glob has no match

wallpaper_dir="$HOME/Dropbox/Photos/Wallpapers"
cd $wallpaper_dir

files=(*jpg *jpeg *png *bmp)

for file in "${files[@]}"
do  read -r width height <<< $(sips -g pixelWidth -g pixelHeight "$file" | awk '/pixel(Width|Height)/ {print $2}')