FZF user input example #1 greyscale images

#!/bin/bash
######################################################################
#Copyright (C) 2020  Kris Occhipinti
#https://filmsbykris.com

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
#####################################################################

dir="output"
mkdir -p "$dir"

[[ $1 ]] && imgs="$*" || imgs="$(ls *.jpg|fzf --prompt "Files: " -m)"

echo "$imgs"|tr " " "\n"|while read img
do
  echo $img
  convert "$img" -set colorspace Gray "$dir/$img"
done

xdg-open "$dir"