title: Ruby - fetch image from URL and convert it to text
body: <p>I need to fetch images from a website and parse the text on it in Ruby.</p>
  
  <p>The images are very simple, they're just digits represented in picture form:</p>
  
  <p><a href="http://www.telelistas.net/ImgFactory.ashx?t=6A7B&amp;s=0" rel="nofollow">http://www.telelistas.net/ImgFactory.ashx?t=6A7B&amp;s=0</a></p>
  
  <p>Using this example, I'd like to convert this picture to the text "56".</p>