Find all images in a directory, create a backup subdirectory in the current directory, and then copy these images to the backup folder. Preparation for keeping track (poorly) of original files that are being optimized.

backup-all-images.sh

#!/bin/sh

mkdir backup; \                                                                                                                                                                  
for file in $(
  find . -exec \
  file {} \; | \
  awk -F':' '{ if ($2 ~/[Ii]mage|EPS/) print $1,"\n"}'| \
  sed s/\.//); 
do
  cp  -R -v .$file ./backup/
done