title: What is the simplest way to check if two images are the same?
body: <p>I'm not talking titles / name, I mean pixel analyzation or perhaps bitmapping... perhaps an OCR? </p>
  
  <p>I need to reduce the server usage by not using duplicate media so if a person is trying to upload a photo that is already on the server uploaded by someone else, that photo will not be uploaded. </p>