title: How is exif info encoded?
body: <p>Greetings, </p>
  
  <p>I'm going to get exif info from some images using android. I know there are some standard java lib's out there that I could use with the device. I'm sure I will end up using one. </p>
  
  <p>But in the meantime can someone explain to me how this information is encoded inside a JPG?  Where / how would you usually get the info from the document. When I opent he document up with a text editor its all binary. </p>
  
  <p>Curious as to how it works and how I could potentially read the data in question.</p>