title: How to Create Image Fingerprint using Opencv?
body: <p>I have a project about image similarity. I've tried Opencv feature [detector-discrioptor-matcher] methods. The combination is that ORB-ORB-BruteForce is best. But, want to create a fingerprint using this methods and save on DB. </p>
  
  <p>How to create a fingerprint for image similarity search?</p>
  
  <p>Thanks.</p>