title: How to make a .bmp file (some hex data) display as a qr-code
body: <p>I am a college student dealing with some file problems.</p>
  
  <p>I have saved a .bmp file which I knew it should be a qr-code.</p>
  
  <p>Instead, it displayed as a meaningless picture.</p>
  
  <p><a href="https://i.stack.imgur.com/TAKke.png" rel="nofollow noreferrer">Example meaningless picture</a></p>
  
  <p>I'm wondering what's might be happening and what can I do ?</p>
  
  <p>Thanks.  </p>