Simple Silhouette Detection

Design things so that users will appear significantly different from background

Videoplace method:

Have user stand in front of giant white lightbox
Point camera at lightbox
Any dark pixels are the user

Bubbles, Haptomat, Shadow Garden method:

Have user stand between projector & screen
Make sure all the graphics are very light colored
User casts a dark shadow
Dark pixels are the user

Possible problems: video noise, lighting, detecting user as well as user's shadow

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