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I've always thought a Thermal Imaging camera mounted above the bed would be the best sleep tracking system. It could even be hooked up to a feedback loop where if it detects your body temperature rising it can increase your fan speed, things like that. It would be a fun computer vision project.

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An averaged heat-map would also help solve the pirennial relationship question of who encroaches on whose side of the bed the most :)

I think you’d find that the actual physical locations of the bed’s occupants are less relevant than you might think to these accusations, ;)

we've done projectd with kinect sensors for fall prevention in hospitals. one con is that many people are uneasy if there's a camera-looking sensor pointing at their bed.

n=? ...would like to know more.

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