title: Automatically blur numbers and letters using ruby or imagemagick?
body: <p>I have an application where users upload images of cars. I want to build a script that will scan these images for number plates and automatically blur them, partially or fully.</p>
  
  <p>How would I achieve this? I am using Ruby on Rails and ImageMagick for my app. Is there a script that will allow me to recognise numbers and letters, or maybe the shape of a number plate?</p>