This is the last post of this roadtest

The initial idea was to transmit a unique code using the visible light. This has applications in indoor navigation (in museum, shops, etc)

 

I got a working prototype (I will publish a video in the next days), with several limitations

 

1. the algorithm used is tailored for my smartphone, so I don't expect it to work on another model. In particular, the algorithm is affected by the frame rate and by the exposure time. Also, not all the possible image formats supplied by the smartphone camera are supported. A more robust algorithm in my hopinion should be based on FFT transform

 

2. the application works only with reflected light

 

3. There is no way to "isolate" codes transmitted by LEDS that are installed close to each other

 

So, far from being a commercial application, in these roadtest I got the opportunity to explore this new (at least for me) field of application