This is what I posted on arduino forums:

Hello everyone,

I'm studying architecture and we are set to design an interactive pavillion this semester using various tools (arduino preferably).

We first made an animation using 3dsmax etc to explain a number of black and white graphics which later lead on to exploring space in various forms.

I want to have a part of the pavillion interactive where a camera would track peoples movement and that it would be projected very pixelated and in black and white on a wall in real time. Visitors would create a graphic space depending on how they move and act.

The diagram is trying to explain how the camera would track people.

And my question is: would this be possible to do? I thought of using the wii motion camera somehow but wanted to ask for tips here first.

Maybe it would be processing and not arduino. Thanks  

Sam

Diagram1:
http://img254.imageshack.us/i/diagrameh.jpg/  

Diagram2:
http://img43.imageshack.us/i/diagram2.jpg/

Screenshot from film:
http://img190.imageshack.us/i/vlcsnap7211244.png/

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I got a tips to use http://s373.net/code/flob/flob.html but I cant find the Processing sketchbook/libraries folder on my mac.

Any input is helpful!