Have you ever wanted to relax with a good book but couldn’t due to the hassle of having to actually read and turn pages? Well, now BrickPi offers 2 solutions to that problem. They have you covered regardless if your document is on a tablet or resides in a physical book.
The original Bookreader will read out loud the displayed text on a tablet. This is not an application that runs on the tablet, it is a completely separate device that ‘reads’ the tablet screen. As you could guess from the BrickPi name, the brains behind the operation is a Raspberry Pi. A camera takes a photograph of the displayed text and the Raspberry Pi converts that image file to text using Optical Character Recognition. A Text-to-Speech engine then speaks the text in a robotic sounding voice. In order to change the page the Raspberry Pi controls a Lego Mindstorms arm that swipes across the tablet screen and the entire process is repeated.

http://hackaday.com/2014/05/10/brick...ud-you-choose/