gesture recognition

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Interface with computers using gestures of the human body, typically hand movements. In gesture recognition technology, a camera reads the movements of the human body and communicates the data to a computer that uses the gestures as input to control devices or applications. For example, a person clapping his hands together in front of a camera can produce the sound of cymbals being crashed together when the gesture is fed through a computer.Unlike haptic interfaces, gesture recognition does not require the user to wear any special equipment or attach any devices to the body. The gestures of the body are read by a camera instead of sensors attached to a device such as a data glove

http://www.youtube.com/watch?v=tEWS4ubg

The basic concept of Gesture Technology lies in a recognition device. This device can be suspended from the ceiling or could be clamped like a web cam on top of your LCD display. The built in cameras detects the movements of finger and hand in real time, simultaneously transmitting the information back to a computer. The same concept applies in catching the movements of other body parts. Large amount of gestures data are fed into computers. These gestures data could be used later to detect and identify future movement of users.