Gesture recognition is a dynamic area of research in human-computer interfaces. New input methods, closer to the human nature, are searched for replacing the traditional ones. Gestures are a very spread mean of communication among people. There are two implementations of gesture recognizing systems: sensor-based and vision-based. The sensor-based solutions use accelerometers or gyros for detecting the gestures. This paper presents a hand gesture recognition system built around an accelerometer sensor. The system is made by a sensing and transmitting part and a computer. The computer receives the data describing the motion trajectory and interprets it, through OCR, as a letter. It can be used in a more complex human-computer friendly interface, in which the commands are given by gestures. Without the OCR part, the system can be also used in gaming systems, embedded systems, intelligent peripherals and so on.
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