On the university we made a robot using Lego, which communicated on bluetooth with a tablet. We wrote a smile detector using opencv for the tablet. On the tablet you saw the view of the front camera. And when you smiled into the camera, the tablet notified the Lego robot which gave you a chewgum. The purpose of this project was to demonstrate on a fair what our robotics group did. People really liked it. 🙂

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