title: How does card.io image processing work?
body: <p>How do services like <a href="https://www.card.io/">card.io</a> work behind the scenes? Do they use an OCR library like Tesseract or is it more complex?</p>
  
  <p>Also, in this <a href="https://www.youtube.com/watch?v=7lg0nMH4NFk">video</a>, it looks like the app is waiting for you to hold your card in a specific range from the camera inside the green boundaries on the camera, and when you do it takes the photo automatically. If the image recognition is happening on the server, how did they do that?</p>
  
  <p>How can I implement my own mobile 2D object scanner? Where do I start?</p>