This script compares the similarity between

gistfile1.txt

#!/bin/bash
# This command expects two params. 
# First param is the directory of the png. 
# Second param is the directory of the webp.
# It will traverse the first directory and compare that file with the same webp in the second directory
# This script requires to download similar script from http://www.fmwconcepts.com/imagemagick/similar/index.php 
# and leave it the same directory as this script. This script will be the one leveraging imagemagick
pngDir=$1  
webpDir=$2
find $1 -name "*.png" | cut -sd / -f 11- | sed 's/\.png$//1'|while read fname; do
   pngFilePath="${pngDir}/${fname}.png"
   webPFilePath="${webpDir}/${fname}.webp"
	 output=$(eval similar -m rgb "$pngFilePath" "$webPFilePath" ) 
	 echo "Comparing $pngFilePath & $webPFilePath: $output"
done