Human beings usually interact with each other either by via a natural language channel such as speech and writing, or by body languag, e.g. hand gestures, head gestures, facial expression, lip motion and so on. As a part of natural language understanding, sign language recognition is very important. On one hand, it is one of the main methods of human-computer interaction in virtual reality; on the other hand, it is an auxiliary tool for a deaf-mute to communicate with ordinary people through computer. In this paper the process of building a simple word-level sign language recognition system is presented, and the method for recognizing sign language words is also proposed.
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