Software Ideas : video based comunicator.

The idea is simple:
application based on light emitting (using the flash or lcd) and receiving (using the camera).
It is like using Morse Code with light to send messages to people that around you.

Sending message :

1. Write the message on you phone.
   
2. Push start transmit , and the Flash (or LCD) will start blinking to transmit the typed text(or image).
   

Receiving Message :

1. Set the application in receive mode
   
2. Capture the flashing light with the camera (or use a already captured movie)
   
3. Select the region from the movie that has to be analyzed (also possible to analyze all the frame).
   
4. After the message end code, the program will show you the content of the message.
   

The speed should be from 1 char/s.

Probably not much practical use from this speed, but the idea should have some practical value anyway.