title: Find Percentage of differences between two Images using Python "imgdiff" library
body: <p>I am working with Image comparison using python "Imgdiff" library. I have images name "image1 and image2". I can find the difference between two images using following command,</p>
  
  <blockquote>
    <p>imgdiff "D:\Project Doc\image mining\Compare images\image1.jpg"
    "D:\Project Doc\image mining\Compare images\image2.jpg" -H</p>
  </blockquote>
  
  <p>It shows the result image with highlight the difference. But here I want to find how many percent (ie: 20%) image1 different from image2. How to achieve this? </p>