For the prototype we made a little installation to mirror the behaviour of the big one. It registers and projects the movements of one person on a white screen of 1.5 x 0.8 m.
To build the screen we take a table without the board, and carefully sew a bed sheet to it. Then we build a pressure sensor to be placed in front of the screen (for an exhaustive explanation of how to build a floor sensor, please see how marco and margherita did it).
To have the lightning conditions under control, we add white background for the floor and part of the wall, and add a lamp on the left side, pointed to the wall (it would be fantastic to have 2 lamps, allows total control over the white balance and helps processing).
We connected then the floor switch to a bread board and a wiring board, and add a led to check the correct behaviour of the sensor and the program running on the wiring microprocessor.
The wiring board was attached to a computer and a webcam was added to finish the mix.
